SystemUtils.java
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org.apache.commons.lang |
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Commons Lang |
View: Reasons, Metrics, Source Code
These are the metrics that contribute to the Enerjy Score for this file, ranked by impact. So the metrics listed at the top influence the score to a greater extent that the metrics listed at the bottom.
| Metric | Description | |
|---|---|---|
| DOC_COMMENT | Number of javadoc comment lines |  |
| COMMENTS | Comment lines | |
| DECL_COMMENTS | Comments in declarations | |
| SIZE | Size of the file in bytes | |
| LINES | Number of lines in the source file | |
| LINE_COMMENT | Number of line comments | |
| JAVA0034 | JAVA0034 Missing braces in if statement | |
| JAVA0084 | JAVA0084 Should use compound assignment operator | |
| COMMENT_DENSITY | Comment density | |
| JAVA0117 | JAVA0117 Missing javadoc: method 'method' | |
| JAVA0166 | JAVA0166 Generic exception caught | |
| PROGRAM_VOLUME | Halstead program volume | |
| EXEC_COMMENTS | Comments in executable code | |
| UNIQUE_OPERANDS | Number of unique operands | |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| PROGRAM_VOCAB | Halstead program vocabulary | |
| JAVA0110 | JAVA0110 Incorrect javadoc: no @return tag | |
| LOOPS | Number of loops | |
| JAVA0108 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0267 | JAVA0267 Use of System.err | |
| PARAMS | Number of formal parameter declarations | |
| JAVA0145 | JAVA0145 Tab character used in source file | |
| EXITS | Procedure exits | |
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.commons.lang;
import java.io.File;
/**
* <p>Helpers for <code>java.lang.System</code>.</p>
*
* <p>If a system property cannot be read due to security restrictions,
* the corresponding field in this class will be set to <code>null</code>
* and a message will be written to <code>System.err</code>.</p>
*
* @author Based on code from Avalon Excalibur
* @author Based on code from Lucene
* @author Stephen Colebourne
* @author <a href="mailto:sdowney@panix.com">Steve Downey</a>
* @author Gary Gregory
* @author Michael Becke
* @author Tetsuya Kaneuchi
* @author Rafal Krupinski
* @author Jason Gritman
* @since 1.0
* @version $Id: SystemUtils.java 595798 2007-11-16 20:01:43Z bayard $
*/
public class SystemUtils {
/**
* The prefix String for all Windows OS.
*/
private static final String OS_NAME_WINDOWS_PREFIX = "Windows";
// System property constants
//-----------------------------------------------------------------------
// These MUST be declared first. Other constants depend on this.
/**
* The System property key for the user home directory.
*/
private static final String USER_HOME_KEY = "user.home";
/**
* The System property key for the user directory.
*/
private static final String USER_DIR_KEY = "user.dir";
/**
* The System property key for the Java IO temporary directory.
*/
private static final String JAVA_IO_TMPDIR_KEY = "java.io.tmpdir";
/**
* The System property key for the Java home directory.
*/
private static final String JAVA_HOME_KEY = "java.home";
/**
* <p>The <code>awt.toolkit</code> System Property.</p>
* <p>Holds a class name, on Windows XP this is <code>sun.awt.windows.WToolkit</code>.</p>
* <p><b>On platforms without a GUI, this value is <code>null</code>.</b></p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since 2.1
*/
public static final String AWT_TOOLKIT = getSystemProperty("awt.toolkit");
/**
* <p>The <code>file.encoding</code> System Property.</p>
* <p>File encoding, such as <code>Cp1252</code>.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since 2.0
* @since Java 1.2
*/
public static final String FILE_ENCODING = getSystemProperty("file.encoding");
/**
* <p>The <code>file.separator</code> System Property.
* File separator (<code>"/"</code> on UNIX).</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.1
*/
public static final String FILE_SEPARATOR = getSystemProperty("file.separator");
/**
* <p>The <code>java.awt.fonts</code> System Property.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since 2.1
*/
public static final String JAVA_AWT_FONTS = getSystemProperty("java.awt.fonts");
/**
* <p>The <code>java.awt.graphicsenv</code> System Property.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since 2.1
*/
public static final String JAVA_AWT_GRAPHICSENV = getSystemProperty("java.awt.graphicsenv");
/**
* <p>
* The <code>java.awt.headless</code> System Property.
* The value of this property is the String <code>"true"</code> or <code>"false"</code>.
* </p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @see #isJavaAwtHeadless()
* @since 2.1
* @since Java 1.4
*/
public static final String JAVA_AWT_HEADLESS = getSystemProperty("java.awt.headless");
/**
* <p>The <code>java.awt.printerjob</code> System Property.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since 2.1
*/
public static final String JAVA_AWT_PRINTERJOB = getSystemProperty("java.awt.printerjob");
/**
* <p>The <code>java.class.path</code> System Property. Java class path.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.1
*/
public static final String JAVA_CLASS_PATH = getSystemProperty("java.class.path");
/**
* <p>The <code>java.class.version</code> System Property.
* Java class format version number.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.1
*/
public static final String JAVA_CLASS_VERSION = getSystemProperty("java.class.version");
/**
* <p>The <code>java.compiler</code> System Property. Name of JIT compiler to use.
* First in JDK version 1.2. Not used in Sun JDKs after 1.2.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.2. Not used in Sun versions after 1.2.
*/
public static final String JAVA_COMPILER = getSystemProperty("java.compiler");
/**
* <p>The <code>java.endorsed.dirs</code> System Property. Path of endorsed directory
* or directories.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.4
*/
public static final String JAVA_ENDORSED_DIRS = getSystemProperty("java.endorsed.dirs");
/**
* <p>The <code>java.ext.dirs</code> System Property. Path of extension directory
* or directories.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.3
*/
public static final String JAVA_EXT_DIRS = getSystemProperty("java.ext.dirs");
/**
* <p>The <code>java.home</code> System Property. Java installation directory.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.1
*/
public static final String JAVA_HOME = getSystemProperty(JAVA_HOME_KEY);
/**
* <p>The <code>java.io.tmpdir</code> System Property. Default temp file path.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.2
*/
public static final String JAVA_IO_TMPDIR = getSystemProperty(JAVA_IO_TMPDIR_KEY);
/**
* <p>The <code>java.library.path</code> System Property. List of paths to search
* when loading libraries.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.2
*/
public static final String JAVA_LIBRARY_PATH = getSystemProperty("java.library.path");
/**
* <p>The <code>java.runtime.name</code> System Property. Java Runtime Environment
* name.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since 2.0
* @since Java 1.3
*/
public static final String JAVA_RUNTIME_NAME = getSystemProperty("java.runtime.name");
/**
* <p>The <code>java.runtime.version</code> System Property. Java Runtime Environment
* version.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since 2.0
* @since Java 1.3
*/
public static final String JAVA_RUNTIME_VERSION = getSystemProperty("java.runtime.version");
/**
* <p>The <code>java.specification.name</code> System Property. Java Runtime Environment
* specification name.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.2
*/
public static final String JAVA_SPECIFICATION_NAME = getSystemProperty("java.specification.name");
/**
* <p>The <code>java.specification.vendor</code> System Property. Java Runtime Environment
* specification vendor.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.2
*/
public static final String JAVA_SPECIFICATION_VENDOR = getSystemProperty("java.specification.vendor");
/**
* <p>The <code>java.specification.version</code> System Property. Java Runtime Environment
* specification version.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.3
*/
public static final String JAVA_SPECIFICATION_VERSION = getSystemProperty("java.specification.version");
/**
* <p>The <code>java.util.prefs.PreferencesFactory</code> System Property. A class name.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since 2.1
* @since Java 1.4
*/
public static final String JAVA_UTIL_PREFS_PREFERENCES_FACTORY =
getSystemProperty("java.util.prefs.PreferencesFactory");
/**
* <p>The <code>java.vendor</code> System Property. Java vendor-specific string.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.1
*/
public static final String JAVA_VENDOR = getSystemProperty("java.vendor");
/**
* <p>The <code>java.vendor.url</code> System Property. Java vendor URL.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.1
*/
public static final String JAVA_VENDOR_URL = getSystemProperty("java.vendor.url");
/**
* <p>The <code>java.version</code> System Property. Java version number.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.1
*/
public static final String JAVA_VERSION = getSystemProperty("java.version");
/**
* <p>The <code>java.vm.info</code> System Property. Java Virtual Machine implementation
* info.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since 2.0
* @since Java 1.2
*/
public static final String JAVA_VM_INFO = getSystemProperty("java.vm.info");
/**
* <p>The <code>java.vm.name</code> System Property. Java Virtual Machine implementation
* name.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.2
*/
public static final String JAVA_VM_NAME = getSystemProperty("java.vm.name");
/**
* <p>The <code>java.vm.specification.name</code> System Property. Java Virtual Machine
* specification name.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.2
*/
public static final String JAVA_VM_SPECIFICATION_NAME = getSystemProperty("java.vm.specification.name");
/**
* <p>The <code>java.vm.specification.vendor</code> System Property. Java Virtual
* Machine specification vendor.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.2
*/
public static final String JAVA_VM_SPECIFICATION_VENDOR = getSystemProperty("java.vm.specification.vendor");
/**
* <p>The <code>java.vm.specification.version</code> System Property. Java Virtual Machine
* specification version.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.2
*/
public static final String JAVA_VM_SPECIFICATION_VERSION = getSystemProperty("java.vm.specification.version");
/**
* <p>The <code>java.vm.vendor</code> System Property. Java Virtual Machine implementation
* vendor.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.2
*/
public static final String JAVA_VM_VENDOR = getSystemProperty("java.vm.vendor");
/**
* <p>The <code>java.vm.version</code> System Property. Java Virtual Machine
* implementation version.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.2
*/
public static final String JAVA_VM_VERSION = getSystemProperty("java.vm.version");
/**
* <p>The <code>line.separator</code> System Property. Line separator
* (<code>"\n"</code> on UNIX).</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.1
*/
public static final String LINE_SEPARATOR = getSystemProperty("line.separator");
/**
* <p>The <code>os.arch</code> System Property. Operating system architecture.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.1
*/
public static final String OS_ARCH = getSystemProperty("os.arch");
/**
* <p>The <code>os.name</code> System Property. Operating system name.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.1
*/
public static final String OS_NAME = getSystemProperty("os.name");
/**
* <p>The <code>os.version</code> System Property. Operating system version.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.1
*/
public static final String OS_VERSION = getSystemProperty("os.version");
/**
* <p>The <code>path.separator</code> System Property. Path separator
* (<code>":"</code> on UNIX).</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.1
*/
public static final String PATH_SEPARATOR = getSystemProperty("path.separator");
/**
* <p>The <code>user.country</code> or <code>user.region</code> System Property.
* User's country code, such as <code>GB</code>. First in JDK version 1.2 as
* <code>user.region</code>. Renamed to <code>user.country</code> in 1.4</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since 2.0
* @since Java 1.2
*/
public static final String USER_COUNTRY =
getSystemProperty("user.country") == null ?
getSystemProperty("user.region") : getSystemProperty("user.country");
/**
* <p>The <code>user.dir</code> System Property. User's current working
* directory.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.1
*/
public static final String USER_DIR = getSystemProperty(USER_DIR_KEY);
/**
* <p>The <code>user.home</code> System Property. User's home directory.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.1
*/
public static final String USER_HOME = getSystemProperty(USER_HOME_KEY);
/**
* <p>The <code>user.language</code> System Property. User's language code,
* such as <code>"en"</code>.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since 2.0
* @since Java 1.2
*/
public static final String USER_LANGUAGE = getSystemProperty("user.language");
/**
* <p>The <code>user.name</code> System Property. User's account name.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since Java 1.1
*/
public static final String USER_NAME = getSystemProperty("user.name");
/**
* <p>The <code>user.timezone</code> System Property.
* For example: <code>"America/Los_Angeles"</code>.</p>
*
* <p>Defaults to <code>null</code> if the runtime does not have
* security access to read this property or the property does not exist.</p>
*
* <p>
* This value is initialized when the class is loaded. If {@link System#setProperty(String,String)}
* or {@link System#setProperties(java.util.Properties)} is called after this class is loaded, the value
* will be out of sync with that System property.
* </p>
*
* @since 2.1
*/
public static final String USER_TIMEZONE = getSystemProperty("user.timezone");
// Java version
//-----------------------------------------------------------------------
// This MUST be declared after those above as it depends on the
// values being set up
/**
* <p>Gets the Java version as a <code>String</code> trimming leading letters.</p>
*
* <p>The field will return <code>null</code> if {@link #JAVA_VERSION} is <code>null</code>.</p>
*
* @since 2.1
*/
public static final String JAVA_VERSION_TRIMMED = getJavaVersionTrimmed();
// Java version values
//-----------------------------------------------------------------------
// These MUST be declared after the trim above as they depend on the
// value being set up
/**
* <p>Gets the Java version as a <code>float</code>.</p>
*
* <p>Example return values:</p>
* <ul>
* <li><code>1.2f</code> for JDK 1.2
* <li><code>1.31f</code> for JDK 1.3.1
* </ul>
*
* <p>The field will return zero if {@link #JAVA_VERSION} is <code>null</code>.</p>
*
* @since 2.0
*/
public static final float JAVA_VERSION_FLOAT = getJavaVersionAsFloat();
/**
* <p>Gets the Java version as an <code>int</code>.</p>
*
* <p>Example return values:</p>
* <ul>
* <li><code>120</code> for JDK 1.2
* <li><code>131</code> for JDK 1.3.1
* </ul>
*
* <p>The field will return zero if {@link #JAVA_VERSION} is <code>null</code>.</p>
*
* @since 2.0
*/
public static final int JAVA_VERSION_INT = getJavaVersionAsInt();
// Java version checks
//-----------------------------------------------------------------------
// These MUST be declared after those above as they depend on the
// values being set up
/**
* <p>Is <code>true</code> if this is Java version 1.1 (also 1.1.x versions).</p>
*
* <p>The field will return <code>false</code> if {@link #JAVA_VERSION} is
* <code>null</code>.</p>
*/
public static final boolean IS_JAVA_1_1 = getJavaVersionMatches("1.1");
/**
* <p>Is <code>true</code> if this is Java version 1.2 (also 1.2.x versions).</p>
*
* <p>The field will return <code>false</code> if {@link #JAVA_VERSION} is
* <code>null</code>.</p>
*/
public static final boolean IS_JAVA_1_2 = getJavaVersionMatches("1.2");
/**
* <p>Is <code>true</code> if this is Java version 1.3 (also 1.3.x versions).</p>
*
* <p>The field will return <code>false</code> if {@link #JAVA_VERSION} is
* <code>null</code>.</p>
*/
public static final boolean IS_JAVA_1_3 = getJavaVersionMatches("1.3");
/**
* <p>Is <code>true</code> if this is Java version 1.4 (also 1.4.x versions).</p>
*
* <p>The field will return <code>false</code> if {@link #JAVA_VERSION} is
* <code>null</code>.</p>
*/
public static final boolean IS_JAVA_1_4 = getJavaVersionMatches("1.4");
/**
* <p>Is <code>true</code> if this is Java version 1.5 (also 1.5.x versions).</p>
*
* <p>The field will return <code>false</code> if {@link #JAVA_VERSION} is
* <code>null</code>.</p>
*/
public static final boolean IS_JAVA_1_5 = getJavaVersionMatches("1.5");
/**
* <p>Is <code>true</code> if this is Java version 1.6 (also 1.6.x versions).</p>
*
* <p>The field will return <code>false</code> if {@link #JAVA_VERSION} is
* <code>null</code>.</p>
*/
public static final boolean IS_JAVA_1_6 = getJavaVersionMatches("1.6");
// Operating system checks
//-----------------------------------------------------------------------
// These MUST be declared after those above as they depend on the
// values being set up
// OS names from http://www.vamphq.com/os.html
// Selected ones included - please advise dev@commons.apache.org
// if you want another added or a mistake corrected
/**
* <p>Is <code>true</code> if this is AIX.</p>
*
* <p>The field will return <code>false</code> if <code>OS_NAME</code> is
* <code>null</code>.</p>
*
* @since 2.0
*/
public static final boolean IS_OS_AIX = getOSMatches("AIX");
/**
* <p>Is <code>true</code> if this is HP-UX.</p>
*
* <p>The field will return <code>false</code> if <code>OS_NAME</code> is
* <code>null</code>.</p>
*
* @since 2.0
*/
public static final boolean IS_OS_HP_UX = getOSMatches("HP-UX");
/**
* <p>Is <code>true</code> if this is Irix.</p>
*
* <p>The field will return <code>false</code> if <code>OS_NAME</code> is
* <code>null</code>.</p>
*
* @since 2.0
*/
public static final boolean IS_OS_IRIX = getOSMatches("Irix");
/**
* <p>Is <code>true</code> if this is Linux.</p>
*
* <p>The field will return <code>false</code> if <code>OS_NAME</code> is
* <code>null</code>.</p>
*
* @since 2.0
*/
public static final boolean IS_OS_LINUX = getOSMatches("Linux") || getOSMatches("LINUX");
/**
* <p>Is <code>true</code> if this is Mac.</p>
*
* <p>The field will return <code>false</code> if <code>OS_NAME</code> is
* <code>null</code>.</p>
*
* @since 2.0
*/
public static final boolean IS_OS_MAC = getOSMatches("Mac");
/**
* <p>Is <code>true</code> if this is Mac.</p>
*
* <p>The field will return <code>false</code> if <code>OS_NAME</code> is
* <code>null</code>.</p>
*
* @since 2.0
*/
public static final boolean IS_OS_MAC_OSX = getOSMatches("Mac OS X");
/**
* <p>Is <code>true</code> if this is OS/2.</p>
*
* <p>The field will return <code>false</code> if <code>OS_NAME</code> is
* <code>null</code>.</p>
*
* @since 2.0
*/
public static final boolean IS_OS_OS2 = getOSMatches("OS/2");
/**
* <p>Is <code>true</code> if this is Solaris.</p>
*
* <p>The field will return <code>false</code> if <code>OS_NAME</code> is
* <code>null</code>.</p>
*
* @since 2.0
*/
public static final boolean IS_OS_SOLARIS = getOSMatches("Solaris");
/**
* <p>Is <code>true</code> if this is SunOS.</p>
*
* <p>The field will return <code>false</code> if <code>OS_NAME</code> is
* <code>null</code>.</p>
*
* @since 2.0
*/
public static final boolean IS_OS_SUN_OS = getOSMatches("SunOS");
/**
* <p>Is <code>true</code> if this is a POSIX compilant system,
* as in any of AIX, HP-UX, Irix, Linux, MacOSX, Solaris or SUN OS.</p>
*
* <p>The field will return <code>false</code> if <code>OS_NAME</code> is
* <code>null</code>.</p>
*
* @since 2.1
*/
public static final boolean IS_OS_UNIX =
IS_OS_AIX || IS_OS_HP_UX || IS_OS_IRIX || IS_OS_LINUX ||
IS_OS_MAC_OSX || IS_OS_SOLARIS || IS_OS_SUN_OS;
/**
* <p>Is <code>true</code> if this is Windows.</p>
*
* <p>The field will return <code>false</code> if <code>OS_NAME</code> is
* <code>null</code>.</p>
*
* @since 2.0
*/
public static final boolean IS_OS_WINDOWS = getOSMatches(OS_NAME_WINDOWS_PREFIX);
/**
* <p>Is <code>true</code> if this is Windows 2000.</p>
*
* <p>The field will return <code>false</code> if <code>OS_NAME</code> is
* <code>null</code>.</p>
*
* @since 2.0
*/
public static final boolean IS_OS_WINDOWS_2000 = getOSMatches(OS_NAME_WINDOWS_PREFIX, "5.0");
/**
* <p>Is <code>true</code> if this is Windows 95.</p>
*
* <p>The field will return <code>false</code> if <code>OS_NAME</code> is
* <code>null</code>.</p>
*
* @since 2.0
*/
public static final boolean IS_OS_WINDOWS_95 = getOSMatches(OS_NAME_WINDOWS_PREFIX + " 9", "4.0");
// JDK 1.2 running on Windows98 returns 'Windows 95', hence the above
/**
* <p>Is <code>true</code> if this is Windows 98.</p>
*
* <p>The field will return <code>false</code> if <code>OS_NAME</code> is
* <code>null</code>.</p>
*
* @since 2.0
*/
public static final boolean IS_OS_WINDOWS_98 = getOSMatches(OS_NAME_WINDOWS_PREFIX + " 9", "4.1");
// JDK 1.2 running on Windows98 returns 'Windows 95', hence the above
/**
* <p>Is <code>true</code> if this is Windows ME.</p>
*
* <p>The field will return <code>false</code> if <code>OS_NAME</code> is
* <code>null</code>.</p>
*
* @since 2.0
*/
public static final boolean IS_OS_WINDOWS_ME = getOSMatches(OS_NAME_WINDOWS_PREFIX, "4.9");
// JDK 1.2 running on WindowsME may return 'Windows 95', hence the above
/**
* <p>Is <code>true</code> if this is Windows NT.</p>
*
* <p>The field will return <code>false</code> if <code>OS_NAME</code> is
* <code>null</code>.</p>
*
* @since 2.0
*/
public static final boolean IS_OS_WINDOWS_NT = getOSMatches(OS_NAME_WINDOWS_PREFIX + " NT");
// Windows 2000 returns 'Windows 2000' but may suffer from same JDK1.2 problem
/**
* <p>Is <code>true</code> if this is Windows XP.</p>
*
* <p>The field will return <code>false</code> if <code>OS_NAME</code> is
* <code>null</code>.</p>
*
* @since 2.0
*/
public static final boolean IS_OS_WINDOWS_XP = getOSMatches(OS_NAME_WINDOWS_PREFIX, "5.1");
//-----------------------------------------------------------------------
/**
* <p>Is <code>true</code> if this is Windows Vista.</p>
*
* <p>The field will return <code>false</code> if <code>OS_NAME</code> is
* <code>null</code>.</p>
*
* @since 2.4
*/
public static final boolean IS_OS_WINDOWS_VISTA = getOSMatches(OS_NAME_WINDOWS_PREFIX, "6.0");
//-----------------------------------------------------------------------
/**
* <p>SystemUtils instances should NOT be constructed in standard
* programming. Instead, the class should be used as
* <code>SystemUtils.FILE_SEPARATOR</code>.</p>
*
* <p>This constructor is public to permit tools that require a JavaBean
* instance to operate.</p>
*/
public SystemUtils() {
super();
}
//-----------------------------------------------------------------------
/**
* <p>Gets the Java version number as a <code>float</code>.</p>
*
* <p>Example return values:</p>
* <ul>
* <li><code>1.2f</code> for JDK 1.2
* <li><code>1.31f</code> for JDK 1.3.1
* </ul>
*
* @return the version, for example 1.31f for JDK 1.3.1
* @deprecated Use {@link #JAVA_VERSION_FLOAT} instead.
* Method will be removed in Commons Lang 3.0.
*/
public static float getJavaVersion() {
return JAVA_VERSION_FLOAT;
}
/**
* <p>Gets the Java version number as a <code>float</code>.</p>
*
* <p>Example return values:</p>
* <ul>
* <li><code>1.2f</code> for JDK 1.2
* <li><code>1.31f</code> for JDK 1.3.1
* </ul>
*
* <p>Patch releases are not reported.
* Zero is returned if {@link #JAVA_VERSION_TRIMMED} is <code>null</code>.</p>
*
* @return the version, for example 1.31f for JDK 1.3.1
*/
private static float getJavaVersionAsFloat() {
if (JAVA_VERSION_TRIMMED == null) {
return 0f;
}
String str = JAVA_VERSION_TRIMMED.substring(0, 3);
if (JAVA_VERSION_TRIMMED.length() >= 5) {
str = str + JAVA_VERSION_TRIMMED.substring(4, 5);
}
try {
return Float.parseFloat(str);
} catch (Exception ex) {
return 0;
}
}
/**
* <p>Gets the Java version number as an <code>int</code>.</p>
*
* <p>Example return values:</p>
* <ul>
* <li><code>120</code> for JDK 1.2
* <li><code>131</code> for JDK 1.3.1
* </ul>
*
* <p>Patch releases are not reported.
* Zero is returned if {@link #JAVA_VERSION_TRIMMED} is <code>null</code>.</p>
*
* @return the version, for example 131 for JDK 1.3.1
*/
private static int getJavaVersionAsInt() {
if (JAVA_VERSION_TRIMMED == null) {
return 0;
}
String str = JAVA_VERSION_TRIMMED.substring(0, 1);
str = str + JAVA_VERSION_TRIMMED.substring(2, 3);
if (JAVA_VERSION_TRIMMED.length() >= 5) {
str = str + JAVA_VERSION_TRIMMED.substring(4, 5);
} else {
str = str + "0";
}
try {
return Integer.parseInt(str);
} catch (Exception ex) {
return 0;
}
}
/**
* Trims the text of the java version to start with numbers.
*
* @return the trimmed java version
*/
private static String getJavaVersionTrimmed() {
if (JAVA_VERSION != null) {
for (int i = 0; i < JAVA_VERSION.length(); i++) {
char ch = JAVA_VERSION.charAt(i);
if (ch >= '0' && ch <= '9') {
return JAVA_VERSION.substring(i);
}
}
}
return null;
}
/**
* <p>Decides if the java version matches.</p>
*
* @param versionPrefix the prefix for the java version
* @return true if matches, or false if not or can't determine
*/
private static boolean getJavaVersionMatches(String versionPrefix) {
if (JAVA_VERSION_TRIMMED == null) {
return false;
}
return JAVA_VERSION_TRIMMED.startsWith(versionPrefix);
}
/**
* <p>Decides if the operating system matches.</p>
*
* @param osNamePrefix the prefix for the os name
* @return true if matches, or false if not or can't determine
*/
private static boolean getOSMatches(String osNamePrefix) {
if (OS_NAME == null) {
return false;
}
return OS_NAME.startsWith(osNamePrefix);
}
/**
* <p>Decides if the operating system matches.</p>
*
* @param osNamePrefix the prefix for the os name
* @param osVersionPrefix the prefix for the version
* @return true if matches, or false if not or can't determine
*/
private static boolean getOSMatches(String osNamePrefix, String osVersionPrefix) {
if (OS_NAME == null || OS_VERSION == null) {
return false;
}
return OS_NAME.startsWith(osNamePrefix) && OS_VERSION.startsWith(osVersionPrefix);
}
//-----------------------------------------------------------------------
/**
* <p>Gets a System property, defaulting to <code>null</code> if the property
* cannot be read.</p>
*
* <p>If a <code>SecurityException</code> is caught, the return
* value is <code>null</code> and a message is written to <code>System.err</code>.</p>
*
* @param property the system property name
* @return the system property value or <code>null</code> if a security problem occurs
*/
private static String getSystemProperty(String property) {
try {
return System.getProperty(property);
} catch (SecurityException ex) {
// we are not allowed to look at this property
System.err.println(
"Caught a SecurityException reading the system property '" + property
+ "'; the SystemUtils property value will default to null."
);
return null;
}
}
/**
* <p>Is the Java version at least the requested version.</p>
*
* <p>Example input:</p>
* <ul>
* <li><code>1.2f</code> to test for JDK 1.2</li>
* <li><code>1.31f</code> to test for JDK 1.3.1</li>
* </ul>
*
* @param requiredVersion the required version, for example 1.31f
* @return <code>true</code> if the actual version is equal or greater
* than the required version
*/
public static boolean isJavaVersionAtLeast(float requiredVersion) {
return JAVA_VERSION_FLOAT >= requiredVersion;
}
/**
* <p>Is the Java version at least the requested version.</p>
*
* <p>Example input:</p>
* <ul>
* <li><code>120</code> to test for JDK 1.2 or greater</li>
* <li><code>131</code> to test for JDK 1.3.1 or greater</li>
* </ul>
*
* @param requiredVersion the required version, for example 131
* @return <code>true</code> if the actual version is equal or greater
* than the required version
* @since 2.0
*/
public static boolean isJavaVersionAtLeast(int requiredVersion) {
return JAVA_VERSION_INT >= requiredVersion;
}
/**
* Returns whether the {@link #JAVA_AWT_HEADLESS} value is <code>true</code>.
*
* @return <code>true</code> if <code>JAVA_AWT_HEADLESS</code> is <code>"true"</code>,
* <code>false</code> otherwise.
*
* @see #JAVA_AWT_HEADLESS
* @since 2.1
* @since Java 1.4
*/
public static boolean isJavaAwtHeadless() {
return JAVA_AWT_HEADLESS != null ? JAVA_AWT_HEADLESS.equals(Boolean.TRUE.toString()) : false;
}
/**
* <p>Gets the Java home directory as a <code>File</code>.</p>
*
* @return a directory
* @throws SecurityException if a security manager exists and its
* <code>checkPropertyAccess</code> method doesn't allow
* access to the specified system property.
* @see System#getProperty(String)
* @since 2.1
*/
public static File getJavaHome() {
return new File(System.getProperty(JAVA_HOME_KEY));
}
/**
* <p>Gets the Java IO temporary directory as a <code>File</code>.</p>
*
* @return a directory
* @throws SecurityException if a security manager exists and its
* <code>checkPropertyAccess</code> method doesn't allow
* access to the specified system property.
* @see System#getProperty(String)
* @since 2.1
*/
public static File getJavaIoTmpDir() {
return new File(System.getProperty(JAVA_IO_TMPDIR_KEY));
}
/**
* <p>Gets the user directory as a <code>File</code>.</p>
*
* @return a directory
* @throws SecurityException if a security manager exists and its
* <code>checkPropertyAccess</code> method doesn't allow
* access to the specified system property.
* @see System#getProperty(String)
* @since 2.1
*/
public static File getUserDir() {
return new File(System.getProperty(USER_DIR_KEY));
}
/**
* <p>Gets the user home directory as a <code>File</code>.</p>
*
* @return a directory
* @throws SecurityException if a security manager exists and its
* <code>checkPropertyAccess</code> method doesn't allow
* access to the specified system property.
* @see System#getProperty(String)
* @since 2.1
*/
public static File getUserHome() {
return new File(System.getProperty(USER_HOME_KEY));
}
}
The table below shows all metrics for SystemUtils.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 33.00 | Number of blocks | |
| BLOCK_COMMENT | 16.00 | Number of block comment lines | |
| COMMENTS | 1083.00 | Comment lines | |
| COMMENT_DENSITY | 7.17 | Comment density | |
| COMPARISONS | 26.00 | Number of comparison operators | |
| CYCLOMATIC | 36.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 105.00 | Comments in declarations | |
| DOC_COMMENT | 1036.00 | Number of javadoc comment lines | |
| ELOC | 151.00 | Effective lines of code | |
| EXEC_COMMENTS | 1.00 | Comments in executable code | |
| EXITS | 18.00 | Procedure exits | |
| FUNCTIONS | 16.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 43.16 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 32.00 | Interface complexity | |
| JAVA0001 | 0.00 | JAVA0001 Package name does not contain only lower case letters | |
| JAVA0002 | 0.00 | JAVA0002 Package name does not begin with a top level domain name or country code | |
| JAVA0003 | 0.00 | JAVA0003 Minimize use of on-demand (.*) imports | |
| JAVA0004 | 0.00 | JAVA0004 Unnecessary import from java.lang | |
| JAVA0005 | 0.00 | JAVA0005 Imports not in specified order | |
| JAVA0006 | 0.00 | JAVA0006 Empty finally block | |
| JAVA0007 | 0.00 | JAVA0007 Should not declare public field | |
| JAVA0008 | 0.00 | JAVA0008 Empty catch block | |
| JAVA0009 | 0.00 | JAVA0009 Protected member in final class | |
| JAVA0010 | 0.00 | JAVA0010 Non-instantiable class does not contain a non-private static member | |
| JAVA0011 | 0.00 | JAVA0011 Abstract class does not contain an abstract method | |
| JAVA0012 | 0.00 | JAVA0012 Non-constructor method with same name as declaring class | |
| JAVA0013 | 0.00 | JAVA0013 Non-blank final field is not static | |
| JAVA0014 | 1.00 | JAVA0014 Class with only static members has non-private constructor | |
| JAVA0015 | 0.00 | JAVA0015 Package class contains public nested type | |
| JAVA0016 | 0.00 | JAVA0016 Abstract class contains public constructor | |
| JAVA0017 | 0.00 | JAVA0017 Class name does not have required form | |
| JAVA0018 | 0.00 | JAVA0018 Method name does not have required form | |
| JAVA0019 | 0.00 | JAVA0019 Interface name does not have required form | |
| JAVA0020 | 0.00 | JAVA0020 Field name does not have required form | |
| JAVA0021 | 0.00 | JAVA0021 Interface method name does not have required form | |
| JAVA0022 | 0.00 | JAVA0022 Static final field name does not have required form | |
| JAVA0023 | 0.00 | JAVA0023 Empty finalize method | |
| JAVA0024 | 0.00 | JAVA0024 Empty class | |
| JAVA0025 | 0.00 | JAVA0025 Method override is empty | |
| JAVA0026 | 0.00 | JAVA0026 Finalize method with parameters | |
| JAVA0029 | 0.00 | JAVA0029 Private method not used | |
| JAVA0030 | 0.00 | JAVA0030 Private field not used | |
| JAVA0031 | 0.00 | JAVA0031 Case statement not properly closed | |
| JAVA0032 | 0.00 | JAVA0032 Switch statement missing default | |
| JAVA0033 | 0.00 | JAVA0033 default: not last case in switch statement | |
| JAVA0034 | 0.00 | JAVA0034 Missing braces in if statement | |
| JAVA0035 | 0.00 | JAVA0035 Missing braces in for statement | |
| JAVA0036 | 0.00 | JAVA0036 Missing braces in while statement | |
| JAVA0038 | 0.00 | JAVA0038 Non-case label in switch statement | |
| JAVA0039 | 0.00 | JAVA0039 Break statement with label | |
| JAVA0040 | 0.00 | JAVA0040 Switch statement contains N cases (maximum: M) | |
| JAVA0041 | 0.00 | JAVA0041 Nested synchronized block | |
| JAVA0042 | 0.00 | JAVA0042 Empty synchronized statement | |
| JAVA0043 | 0.00 | JAVA0043 Inner class does not use outer class | |
| JAVA0044 | 0.00 | JAVA0044 Serializable class with no instance variables | |
| JAVA0045 | 0.00 | JAVA0045 Serializable class with only transient fields | |
| JAVA0046 | 0.00 | JAVA0046 Name of class not derived from Exception ends with 'Exception' | |
| JAVA0047 | 0.00 | JAVA0047 Serializable class derives from invalid base class | |
| JAVA0048 | 0.00 | JAVA0048 Name of class derived from Exception does not end with 'Exception' | |
| JAVA0049 | 0.00 | JAVA0049 Nested block at depth N (maximum: M) | |
| JAVA0050 | 0.00 | JAVA0050 Class derives from java.lang.Error | |
| JAVA0051 | 0.00 | JAVA0051 Class derives from java.lang.RuntimeException | |
| JAVA0052 | 0.00 | JAVA0052 Class derives from java.lang.Throwable | |
| JAVA0053 | 0.00 | JAVA0053 Unused label | |
| JAVA0054 | 0.00 | JAVA0054 Inheritance depth N exceeds maximum M | |
| JAVA0055 | 0.00 | JAVA0055 Class should be interface | |
| JAVA0056 | 0.00 | JAVA0056 Unnecessary abstract modifier for interface or annotation | |
| JAVA0057 | 1.00 | JAVA0057 Unnecessary default constructor | |
| JAVA0058 | 1.00 | JAVA0058 Constructor calls super() | |
| JAVA0059 | 0.00 | JAVA0059 Method override only calls super() | |
| JAVA0061 | 0.00 | JAVA0061 Inaccessible member in anonymous class | |
| JAVA0062 | 0.00 | JAVA0062 Public class missing public member or protected constructor | |
| JAVA0063 | 0.00 | JAVA0063 Identifier name should not contain '$' | |
| JAVA0064 | 0.00 | JAVA0064 N variations of identifier name (maximum: M) | |
| JAVA0065 | 0.00 | JAVA0065 Unnecessary final modifier for method in final class | |
| JAVA0066 | 0.00 | JAVA0066 Unnecessary modifier for interface nested type | |
| JAVA0067 | 0.00 | JAVA0067 Array descriptor on identifier name | |
| JAVA0068 | 0.00 | JAVA0068 Modifiers not declared in recommended order | |
| JAVA0071 | 0.00 | JAVA0071 Strings compared with == | |
| JAVA0073 | 0.00 | JAVA0073 Integer division in floating-point context | |
| JAVA0074 | 0.00 | JAVA0074 Use of Object.notify() | |
| JAVA0075 | 0.00 | JAVA0075 Method parameter hides field | |
| JAVA0076 | 0.00 | JAVA0076 Use of magic number | |
| JAVA0077 | 0.00 | JAVA0077 Private field not used in declaring class | |
| JAVA0078 | 0.00 | JAVA0078 Floating point values compared with == | |
| JAVA0079 | 0.00 | JAVA0079 Use of instance to reference static member | |
| JAVA0080 | 0.00 | JAVA0080 Import declaration not used | |
| JAVA0081 | 0.00 | JAVA0081 Boolean literal in comparison | |
| JAVA0082 | 0.00 | JAVA0082 Unnecessary widening cast | |
| JAVA0083 | 0.00 | JAVA0083 Unnecessary instanceof test | |
| JAVA0084 | 4.00 | JAVA0084 Should use compound assignment operator | |
| JAVA0085 | 0.00 | JAVA0085 Use of sun.* class | |
| JAVA0087 | 0.00 | JAVA0087 Use of Thread.sleep() | |
| JAVA0089 | 0.00 | JAVA0089 Use of restricted package | |
| JAVA0092 | 0.00 | JAVA0092 Use of restricted type | |
| JAVA0093 | 0.00 | JAVA0093 Redundant assignment | |
| JAVA0094 | 0.00 | JAVA0094 Field hides a superclass field | |
| JAVA0095 | 0.00 | JAVA0095 Uninitialized private field | |
| JAVA0096 | 0.00 | JAVA0096 Field in nested class hides outer field | |
| JAVA0098 | 0.00 | JAVA0098 Minimize use of implicit field initializers | |
| JAVA0100 | 0.00 | JAVA0100 Class contains N non-final fields (maximum: M) | |
| JAVA0101 | 0.00 | JAVA0101 Unnecessary modifier for field in interface | |
| JAVA0102 | 0.00 | JAVA0102 Last statement in finalize() not super.finalize() | |
| JAVA0103 | 0.00 | JAVA0103 Explicit call to finalize() | |
| JAVA0104 | 0.00 | JAVA0104 finalize() only calls super.finalize() | |
| JAVA0105 | 0.00 | JAVA0105 Duplicate import declaration | |
| JAVA0106 | 0.00 | JAVA0106 Unnecessary import from current package | |
| JAVA0108 | 0.00 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0109 | 0.00 | JAVA0109 Incorrect javadoc: no parameter 'parameter' | |
| JAVA0110 | 0.00 | JAVA0110 Incorrect javadoc: no @return tag | |
| JAVA0111 | 0.00 | JAVA0111 Incorrect javadoc: @return tag for void method | |
| JAVA0112 | 0.00 | JAVA0112 Incorrect javadoc: no exception 'exception' in throws | |
| JAVA0113 | 0.00 | JAVA0113 Incorrect javadoc: no @author tag | |
| JAVA0114 | 0.00 | JAVA0114 Incorrect javadoc: no @version tag | |
| JAVA0115 | 0.00 | JAVA0115 Incorrect javadoc: no @throws or @exception tag for 'exception' | |
| JAVA0116 | 0.00 | JAVA0116 Missing javadoc: field 'field' | |
| JAVA0117 | 0.00 | JAVA0117 Missing javadoc: method 'method' | |
| JAVA0118 | 0.00 | JAVA0118 Missing javadoc: type 'type' | |
| JAVA0119 | 0.00 | JAVA0119 Control variable changed within body of for loop | |
| JAVA0123 | 0.00 | JAVA0123 Use all three components of for loop | |
| JAVA0125 | 0.00 | JAVA0125 Continue statement with label | |
| JAVA0126 | 0.00 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0128 | 0.00 | JAVA0128 Public constructor in non-public class | |
| JAVA0130 | 0.00 | JAVA0130 Non-static method does not use instance fields | |
| JAVA0131 | 0.00 | JAVA0131 Compatible method does not override base | |
| JAVA0132 | 0.00 | JAVA0132 Method overload with compatible signature | |
| JAVA0133 | 0.00 | JAVA0133 Non-synchronized method overrides synchronized method | |
| JAVA0135 | 0.00 | JAVA0135 Only one of Object.equals and Object.hashCode defined: missing 'method' | |
| JAVA0136 | 0.00 | JAVA0136 N methods defined in class (maximum: M) | |
| JAVA0137 | 0.00 | JAVA0137 Non-abstract class missing constructor | |
| JAVA0138 | 0.00 | JAVA0138 N parameters defined for method (maximum: M) | |
| JAVA0139 | 0.00 | JAVA0139 Definition of main other than public static void main(java.lang.String[]) | |
| JAVA0141 | 0.00 | JAVA0141 Unnecessary modifier for method in interface | |
| JAVA0143 | 0.00 | JAVA0143 Synchronized method | |
| JAVA0144 | 0.00 | JAVA0144 Line exceeds maximum M characters | |
| JAVA0145 | 0.00 | JAVA0145 Tab character used in source file | |
| JAVA0150 | 0.00 | JAVA0150 java.lang.Error (or subclass) thrown | |
| JAVA0153 | 0.00 | JAVA0153 Inefficient conversion of integer to string | |
| JAVA0159 | 0.00 | JAVA0159 Inefficient conversion of string to integer | |
| JAVA0160 | 0.00 | JAVA0160 Method does not throw specified exception | |
| JAVA0161 | 0.00 | JAVA0161 Conditional wait() not in loop | |
| JAVA0163 | 0.00 | JAVA0163 Empty statement | |
| JAVA0165 | 0.00 | JAVA0165 Conflicting return statement in finally block | |
| JAVA0166 | 2.00 | JAVA0166 Generic exception caught | |
| JAVA0167 | 0.00 | JAVA0167 ThreadDeath not rethrown | |
| JAVA0169 | 0.00 | JAVA0169 Unnecessary catch block: exception 'exception' | |
| JAVA0170 | 0.00 | JAVA0170 Caught exception not derived from java.lang.Exception | |
| JAVA0171 | 0.00 | JAVA0171 Unused local variable | |
| JAVA0173 | 0.00 | JAVA0173 Unused method parameter | |
| JAVA0174 | 0.00 | JAVA0174 Assigned local variable never used | |
| JAVA0175 | 0.00 | JAVA0175 Successive assignment to variable | |
| JAVA0176 | 0.00 | JAVA0176 Local variable name does not have required form | |
| JAVA0177 | 0.00 | JAVA0177 Variable declaration missing initializer | |
| JAVA0179 | 0.00 | JAVA0179 Local variable hides visible field | |
| JAVA0233 | 0.00 | JAVA0233 Definition of serialVersionUID other than 'private static final long serialVersionUID' | |
| JAVA0234 | 0.00 | JAVA0234 Class is Serializable but does not define serialVersionUID | |
| JAVA0235 | 0.00 | JAVA0235 Class defines serialVersionUID but does not implement Serializable | |
| JAVA0236 | 0.00 | JAVA0236 Attempt to clone an object which does not implement Cloneable | |
| JAVA0237 | 0.00 | JAVA0237 Class implements Cloneable but does not have public clone method | |
| JAVA0238 | 0.00 | JAVA0238 Clone method does not call super.clone() | |
| JAVA0239 | 0.00 | JAVA0239 Class declares 'readObject' or 'writeObject' but does not implement Serializable | |
| JAVA0240 | 0.00 | JAVA0240 Serializable class which declares readObject or writeObject but not both | |
| JAVA0241 | 0.00 | JAVA0241 'readObject' or 'writeObject' should be declared private in Serializable class | |
| JAVA0242 | 0.00 | JAVA0242 Transient field in non-Serializable class | |
| JAVA0243 | 0.00 | JAVA0243 'readResolve' or 'writeReplace' should be declared private or protected | |
| JAVA0244 | 0.00 | JAVA0244 Field or method name in subclass differs only by case from inherited field or method | |
| JAVA0245 | 0.00 | JAVA0245 JUnit TestCase with non-trivial constructor | |
| JAVA0246 | 0.00 | JAVA0246 JUnit assertXXX statement missing message parameter | |
| JAVA0247 | 0.00 | JAVA0247 JUnit 'setUp()' and 'tearDown()' should call super method | |
| JAVA0248 | 0.00 | JAVA0248 JUnit method 'setUp' or 'tearDown' with incorrect signature | |
| JAVA0249 | 0.00 | JAVA0249 JUnit TestCase 'suite()' should be declared static | |
| JAVA0250 | 0.00 | JAVA0250 JUnit TestCase declares testXXX method with incorrect signature | |
| JAVA0251 | 0.00 | JAVA0251 Use '%n' for line breaks in printf/format for platform independence | |
| JAVA0252 | 0.00 | JAVA0252 'enum' is a Java 1.5 reserved word | |
| JAVA0253 | 0.00 | JAVA0253 Not all enum constants consumed in switch statement | |
| JAVA0254 | 0.00 | JAVA0254 Use enhanced for loop construct instead of Iterator | |
| JAVA0255 | 0.00 | JAVA0255 Result of method invocation not used | |
| JAVA0256 | 0.00 | JAVA0256 Assignment of external collection/array to field | |
| JAVA0257 | 0.00 | JAVA0257 Use of 'Constant Interface' anti-pattern | |
| JAVA0258 | 0.00 | JAVA0258 Implement Iterable for foreach compatibility | |
| JAVA0259 | 0.00 | JAVA0259 Return of collection/array field | |
| JAVA0260 | 0.00 | JAVA0260 Use 'enum' instead of Enumerated Type pattern | |
| JAVA0261 | 0.00 | JAVA0261 Use specialized Enum collection types | |
| JAVA0262 | 0.00 | JAVA0262 Use of char in integer context | |
| JAVA0263 | 0.00 | JAVA0263 Long literal ends with 'l' instead of 'L' | |
| JAVA0264 | 0.00 | JAVA0264 Integer math in long context - check for overflow | |
| JAVA0265 | 0.00 | JAVA0265 Use of Throwable.printStackTrace() | |
| JAVA0266 | 0.00 | JAVA0266 Use of System.out | |
| JAVA0267 | 1.00 | JAVA0267 Use of System.err | |
| JAVA0269 | 0.00 | JAVA0269 Contents of StringBuffer never used | |
| JAVA0270 | 0.00 | JAVA0270 Use Java 5.0 enhanced for loop construct to iterate over all elements in an array | |
| JAVA0271 | 0.00 | JAVA0271 Minimize use of on-demand (.*) static imports | |
| JAVA0272 | 0.00 | JAVA0272 Thread.run() called | |
| JAVA0273 | 0.00 | JAVA0273 Non-final derivative of Thread calls start() in constructor | |
| JAVA0274 | 0.00 | JAVA0274 Serializable class has a synchronized readObject() | |
| JAVA0275 | 0.00 | JAVA0275 Serializable class has a synchronized writeObject() and no other synchronized methods | |
| JAVA0276 | 0.00 | JAVA0276 Unnecessary use of String constructor | |
| JAVA0277 | 0.00 | JAVA0277 Iterator.next() implementation does not throw NoSuchElementException | |
| JAVA0278 | 0.00 | JAVA0278 Unnecessary use of Boolean constructor | |
| JAVA0279 | 0.00 | JAVA0279 Serialization method readObject or readObjectNoData calls an overridable method | |
| JAVA0280 | 0.00 | JAVA0280 IllegalMonitorStateException caught | |
| JAVA0281 | 0.00 | JAVA0281 Iterator.next() not called in loop | |
| JAVA0282 | 0.00 | JAVA0282 Call to Iterator.next() in loop which does not test Iterator.hasNext() | |
| JAVA0283 | 0.00 | JAVA0283 Control variable not updated in loop body | |
| JAVA0284 | 0.00 | JAVA0284 Explicit garbage collection | |
| JAVA0285 | 0.00 | JAVA0285 Dereference of potentially null variable | |
| JAVA0286 | 0.00 | JAVA0286 Dereference of null variable | |
| JAVA0287 | 0.00 | JAVA0287 Unnecessary null check | |
| JAVA0288 | 0.00 | JAVA0288 Inconsistent null check | |
| LINES | 1361.00 | Number of lines in the source file | |
| LINE_COMMENT | 31.00 | Number of line comments | |
| LOC | 181.00 | Lines of code | |
| LOGICAL_LINES | 111.00 | Number of statements | |
| LOOPS | 1.00 | Number of loops | |
| NEST_DEPTH | 4.00 | Maximum nesting depth | |
| OPERANDS | 451.00 | Number of operands | |
| OPERATORS | 959.00 | Number of operators | |
| PARAMS | 7.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 1410.00 | Halstead program length | |
| PROGRAM_VOCAB | 249.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 25.00 | Number of return points from functions | |
| SIZE | 51560.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 209.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 40.00 | Number of unique operators | |
| WHITESPACE | 97.00 | Number of whitespace lines | |