UncaughtExceptionManager.java
| Index Score | ||
|---|---|---|
 |
 |
org.xnap.util |
 |
 |
XNap 3 |
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 | |
|---|---|---|
| EXITS | Procedure exits |  |
| JAVA0008 | JAVA0008 Empty catch block | |
| JAVA0267 | JAVA0267 Use of System.err | |
| JAVA0034 | JAVA0034 Missing braces in if statement | |
| JAVA0177 | JAVA0177 Variable declaration missing initializer | |
| JAVA0117 | JAVA0117 Missing javadoc: method 'method' | |
| NEST_DEPTH | Maximum nesting depth | |
| PROGRAM_VOCAB | Halstead program vocabulary | |
| JAVA0108 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| UNIQUE_OPERANDS | Number of unique operands | |
| JAVA0076 | JAVA0076 Use of magic number | |
| UNIQUE_OPERATORS | Number of unique operators | |
| PROGRAM_VOLUME | Halstead program volume | |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0264 | JAVA0264 Integer math in long context - check for overflow | |
| EXEC_COMMENTS | Comments in executable code | |
| JAVA0123 | JAVA0123 Use all three components of for loop | |
| JAVA0265 | JAVA0265 Use of Throwable.printStackTrace() | |
| JAVA0173 | JAVA0173 Unused method parameter | |
| JAVA0254 | JAVA0254 Use enhanced for loop construct instead of Iterator | |
| DOC_COMMENT | Number of javadoc comment lines | |
| JAVA0130 | JAVA0130 Non-static method does not use instance fields | |
| LINE_COMMENT | Number of line comments | |
| COMPARISONS | Number of comparison operators | |
| COMMENTS | Comment lines | |
| WHITESPACE | Number of whitespace lines | |
/*
* XNap - A P2P framework and client.
*
* See the file AUTHORS for copyright information.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.xnap.util;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Locale;
import java.util.Properties;
import java.util.StringTokenizer;
import java.util.Vector;
import org.apache.log4j.Logger;
import org.xnap.plugin.PluginInfo;
import org.xnap.plugin.PluginManager;
public class UncaughtExceptionManager {
private static final String BLACKLIST_FILENAME
= FileHelper.getHomeDir() + "problemreport";
protected static Logger logger = Logger.getLogger(UncaughtExceptionManager.class);
private static Preferences prefs = Preferences.getInstance();
private static UncaughtExceptionManager singleton = new UncaughtExceptionManager();
private Vector listeners = new Vector();
private HashSet blacklist = new HashSet();
private UncaughtExceptionManager()
{
readBlackList();
}
public static UncaughtExceptionManager getInstance() {
return singleton;
}
public void addExceptionListener(UncaughtExceptionListener l) {
listeners.add(l);
}
public void removeExceptionListener(UncaughtExceptionListener l) {
listeners.remove(l);
}
/**
* Handles e thrown by t. Notifies all listeners in case e is not
* blacklisted.
*/
public void notify(Thread t, Throwable e)
{
// if exception on blacklist do nothing!
if (!notifyAgain(e)) {
logger.warn("Blacklisted error occured!");
e.printStackTrace(System.err);
return;
}
Object[] l = listeners.toArray();
if (l != null && l.length > 0) {
for (int i = l.length - 1; i >= 0; i--) {
((UncaughtExceptionListener)l[i]).uncaughtException(t, e);
}
}
else {
e.printStackTrace(System.err);
}
}
public void notify(Throwable e)
{
notify(Thread.currentThread(), e);
}
public void dontNotifyAgain(Throwable e) {
blacklist.add(buildMD5Hash(e));
writeBlacklist();
}
/**
* Returns stacktrace as String
*
* @param e
*/
public static String getStackTrace(Throwable e)
{
if (e == null) {
return "";
}
ByteArrayOutputStream baos = new ByteArrayOutputStream();
PrintWriter printWriter = new PrintWriter(baos);
e.printStackTrace(printWriter);
printWriter.close();
return removeExceptionDescription
(removeExceptionDescription
(removeExceptionDescription
(baos.toString(),
"java.lang.IndexOutOfBoundsException"),
"java.lang.ArrayIndexOutOfBoundsException"),
"java.lang.RuntimeException");
}
public static String removeExceptionDescription(String trace,
String prefix)
{
if (trace.startsWith(prefix + ": ")) {
int i = trace.indexOf("\n");
if (i != -1) {
return prefix + trace.substring(i);
}
}
return trace;
}
// public static String getLoadedJars() {
// StringBuffer s = new StringBuffer();
// s.append("\nLoaded jars:\n");
// URL[] urls = XNapClassLoader.getInstance().getURLs();
// for (int i=0; i < urls.length; i++) {
// s.append(urls[i].toString()+"\n");
// }
// return s.toString();
// }
public static String getPlugin(Throwable e)
{
return getPlugin(getStackTrace(e));
}
/**
* Scans the stack trace of e for an plugin packages and returns the plugin
* name and version in case of success.
*
* @return null, if no plugin matched; the plugin name and version separated by a space, otherwise
*/
static String getPlugin(String s)
{
// in case we find no enabled plugin we might return a disabled plugin
// as some plugins could still have "zombie" threads arounds after
// they were disabled
String fallback = null;
StringTokenizer t = new StringTokenizer(s, "\n");
while (t.hasMoreTokens()) {
String line = t.nextToken();
if (line.indexOf("org.xnap.plugin") != -1) {
for (Iterator it = PluginManager.getInstance().infos(); it.hasNext();) {
PluginInfo info = (PluginInfo)it.next();
if (info.getClassName() != null && !info.isBase()) {
String packageName = StringHelper.lastPrefix(info.getClassName(), ".");
if (line.indexOf(packageName) != -1) {
if (info.isEnabled()) {
return info.getName() + " " + info.getVersion();
}
else if (fallback == null) {
fallback = info.getName() + " " + info.getVersion();
}
}
}
}
}
}
return fallback;
}
private static String asHex (byte hash[]) {
StringBuffer buf = new StringBuffer(hash.length * 2);
int i;
for (i = 0; i < hash.length; i++) {
if (((int) hash[i] & 0xff) < 0x10)
buf.append("0");
buf.append(Long.toString((int) hash[i] & 0xff, 16));
}
return buf.toString();
}
private static String buildMD5Hash(Throwable e)
{
return buildMD5Hash(getStackTrace(e));
}
private static String buildMD5Hash(String s)
{
MessageDigest md;
try {
md = MessageDigest.getInstance("MD5");
return asHex(md.digest(s.getBytes()));
} catch (NoSuchAlgorithmException ex) {
ex.printStackTrace(System.err);
}
return "";
}
private boolean notifyAgain(Throwable e) {
return !(blacklist.contains(buildMD5Hash(e)));
}
private String encode(Object o)
{
return (o != null) ? URLEncoder.encode(o.toString()) : "";
}
/**
* @param thread
* @param throwable
*/
public void sendProblemReport(Thread thread, Throwable throwable)
throws IOException
{
Properties p = System.getProperties();
StringBuffer report = new StringBuffer();
report.append("version=" + encode(PluginManager.getCoreVersion()));
report.append("&plugin=" + encode(getPlugin(throwable)));
report.append("&locale=" + encode(Locale.getDefault()));
report.append("&os_name=" + encode(p.get("os.name")));
report.append("&os_version=" + encode(p.get("os.version")));
report.append("&os_arch=" + encode(p.get("os.arch")));
report.append("&java_vendor=" + encode(p.get("java.vendor")));
report.append("&java_version=" + encode(p.get("java.version")));
report.append("&stacktrace=" + encode(getStackTrace(throwable)));
String hash = buildMD5Hash(report.toString());
String problemHash = buildMD5Hash(throwable);
report.append("&hash=" + encode(hash));
report.append("&problem_hash=" + encode(problemHash));
URL url=new URL(prefs.get("problemReportURL"));
HttpURLConnection conn = (HttpURLConnection)(url.openConnection());
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setRequestMethod("POST");
conn.setUseCaches(false);
conn.setAllowUserInteraction(false);
PrintWriter out=new PrintWriter(conn.getOutputStream());
out.println(report);
out.flush();
out.close();
BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String s;
while ((s = in.readLine())!=null) {
logger.debug(s);
}
in.close();
conn.disconnect();
//if(conn.getResponseCode()!=HttpURLConnection.HTTP_OK)
// logger.error("Problem sending problem report");
// throw new IOException(conn.getResponseMessage());
}
/**
*
*/
private void readBlackList()
{
logger.info("reading problem report blacklist: "
+ BLACKLIST_FILENAME);
FileInputStream in = null;
try {
in = new FileInputStream(BLACKLIST_FILENAME);
ObjectInputStream p = new ObjectInputStream(in);
blacklist = (HashSet)p.readObject();
}
catch (Throwable e) {
}
finally {
try {
if (in != null) {
in.close();
}
}
catch (IOException e) {
}
}
}
/**
*
*/
private void writeBlacklist()
{
logger.info("writing problem report blacklist: "
+ BLACKLIST_FILENAME);
FileOutputStream out = null;
try {
out = new FileOutputStream(BLACKLIST_FILENAME);
ObjectOutputStream p = new ObjectOutputStream(out);
p.writeObject(blacklist);
}
catch (IOException e) {
}
finally {
try {
if (out != null) {
out.close();
}
}
catch (IOException e) {
}
}
}
}
The table below shows all metrics for UncaughtExceptionManager.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 49.00 | Number of blocks | |
| BLOCK_COMMENT | 18.00 | Number of block comment lines | |
| COMMENTS | 59.00 | Comment lines | |
| COMMENT_DENSITY | 0.33 | Comment density | |
| COMPARISONS | 39.00 | Number of comparison operators | |
| CYCLOMATIC | 45.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 16.00 | Comments in declarations | |
| DOC_COMMENT | 25.00 | Number of javadoc comment lines | |
| ELOC | 179.00 | Effective lines of code | |
| EXEC_COMMENTS | 3.00 | Comments in executable code | |
| EXITS | 74.00 | Procedure exits | |
| FUNCTIONS | 19.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 0.55 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 48.00 | 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 | 4.00 | 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 | 0.00 | 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 non-protected 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 | 1.00 | 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 | 1.00 | 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 | 0.00 | JAVA0057 Unnecessary default constructor | |
| JAVA0058 | 0.00 | 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 | 4.00 | 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 | 0.00 | 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 | 3.00 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0109 | 0.00 | JAVA0109 Incorrect javadoc: no parameter 'parameter' | |
| JAVA0110 | 1.00 | 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 | 1.00 | JAVA0115 Incorrect javadoc: no @throws or @exception tag for 'exception' | |
| JAVA0116 | 0.00 | JAVA0116 Missing javadoc: field 'field' | |
| JAVA0117 | 7.00 | JAVA0117 Missing javadoc: method 'method' | |
| JAVA0118 | 1.00 | JAVA0118 Missing javadoc: type 'type' | |
| JAVA0119 | 0.00 | JAVA0119 Control variable changed within body of for loop | |
| JAVA0123 | 1.00 | 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 | 1.00 | 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 | 591.00 | 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 | 1.00 | JAVA0166 Generic exception caught | |
| JAVA0167 | 0.00 | JAVA0167 ThreadDeath not rethrown | |
| JAVA0169 | 0.00 | JAVA0169 Unnecessary catch block: exception 'exception' | |
| JAVA0170 | 1.00 | JAVA0170 Caught exception not derived from java.lang.Exception | |
| JAVA0171 | 0.00 | JAVA0171 Unused local variable | |
| JAVA0173 | 1.00 | 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 | 3.00 | 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 | 1.00 | 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 | 1.00 | JAVA0264 Integer math in long context - check for overflow | |
| JAVA0265 | 1.00 | JAVA0265 Use of Throwable.printStackTrace() | |
| JAVA0266 | 0.00 | JAVA0266 Use of System.out | |
| JAVA0267 | 3.00 | 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 | |
| JAVA0289 | 1.00 | null | |
| LINES | 345.00 | Number of lines in the source file | |
| LINE_COMMENT | 16.00 | Number of line comments | |
| LOC | 241.00 | Lines of code | |
| LOGICAL_LINES | 123.00 | Number of statements | |
| LOOPS | 5.00 | Number of loops | |
| NEST_DEPTH | 7.00 | Maximum nesting depth | |
| OPERANDS | 558.00 | Number of operands | |
| OPERATORS | 1011.00 | Number of operators | |
| PARAMS | 18.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 1569.00 | Halstead program length | |
| PROGRAM_VOCAB | 276.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 30.00 | Number of return points from functions | |
| SIZE | 8984.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 226.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 50.00 | Number of unique operators | |
| WHITESPACE | 45.00 | Number of whitespace lines | |