ListUtils.java
| Index Score | ||
|---|---|---|
 |
 |
org.apache.commons.collections |
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Commons Collections |
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 | |
| JAVA0254 | JAVA0254 Use enhanced for loop construct instead of Iterator | |
| JAVA0034 | JAVA0034 Missing braces in if statement | |
| DECL_COMMENTS | Comments in declarations | |
| JAVA0081 | JAVA0081 Boolean literal in comparison | |
| SIZE | Size of the file in bytes | |
| LOOPS | Number of loops | |
| JAVA0117 | JAVA0117 Missing javadoc: method 'method' | |
| PROGRAM_VOLUME | Halstead program volume | |
| EXEC_COMMENTS | Comments in executable code | |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0110 | JAVA0110 Incorrect javadoc: no @return tag | |
| LINE_COMMENT | Number of line comments | |
| PARAMS | Number of formal parameter declarations | |
| JAVA0108 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| ELOC | Effective lines of code | |
| WHITESPACE | Number of whitespace lines | |
| LOC | Lines of code | |
| LOGICAL_LINES | Number of statements | |
| JAVA0145 | JAVA0145 Tab character used in source file | |
/*
* 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.collections;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import org.apache.commons.collections.list.FixedSizeList;
import org.apache.commons.collections.list.LazyList;
import org.apache.commons.collections.list.PredicatedList;
import org.apache.commons.collections.list.SynchronizedList;
import org.apache.commons.collections.list.TransformedList;
import org.apache.commons.collections.list.TypedList;
import org.apache.commons.collections.list.UnmodifiableList;
/**
* Provides utility methods and decorators for {@link List} instances.
*
* @since Commons Collections 1.0
* @version $Revision: 638227 $ $Date: 2008-03-18 02:11:16 -0400 (Tue, 18 Mar 2008) $
*
* @author Federico Barbieri
* @author Peter Donald
* @author Paul Jack
* @author Stephen Colebourne
* @author Neil O'Toole
* @author Matthew Hawthorne
* @author Dave Meikle
*/
public class ListUtils {
/**
* An empty unmodifiable list.
* This uses the {@link Collections Collections} implementation
* and is provided for completeness.
*/
public static final List EMPTY_LIST = Collections.EMPTY_LIST;
/**
* <code>ListUtils</code> should not normally be instantiated.
*/
public ListUtils() {
}
//-----------------------------------------------------------------------
/**
* Returns a new list containing all elements that are contained in
* both given lists.
*
* @param list1 the first list
* @param list2 the second list
* @return the intersection of those two lists
* @throws NullPointerException if either list is null
*/
public static List intersection(final List list1, final List list2) {
final ArrayList result = new ArrayList();
final Iterator iterator = list2.iterator();
while (iterator.hasNext()) {
final Object o = iterator.next();
if (list1.contains(o)) {
result.add(o);
}
}
return result;
}
/**
* Subtracts all elements in the second list from the first list,
* placing the results in a new list.
* <p>
* This differs from {@link List#removeAll(Collection)} in that
* cardinality is respected; if <Code>list1</Code> contains two
* occurrences of <Code>null</Code> and <Code>list2</Code> only
* contains one occurrence, then the returned list will still contain
* one occurrence.
*
* @param list1 the list to subtract from
* @param list2 the list to subtract
* @return a new list containing the results
* @throws NullPointerException if either list is null
*/
public static List subtract(final List list1, final List list2) {
final ArrayList result = new ArrayList(list1);
final Iterator iterator = list2.iterator();
while (iterator.hasNext()) {
result.remove(iterator.next());
}
return result;
}
/**
* Returns the sum of the given lists. This is their intersection
* subtracted from their union.
*
* @param list1 the first list
* @param list2 the second list
* @return a new list containing the sum of those lists
* @throws NullPointerException if either list is null
*/
public static List sum(final List list1, final List list2) {
return subtract(union(list1, list2), intersection(list1, list2));
}
/**
* Returns a new list containing the second list appended to the
* first list. The {@link List#addAll(Collection)} operation is
* used to append the two given lists into a new list.
*
* @param list1 the first list
* @param list2 the second list
* @return a new list containing the union of those lists
* @throws NullPointerException if either list is null
*/
public static List union(final List list1, final List list2) {
final ArrayList result = new ArrayList(list1);
result.addAll(list2);
return result;
}
/**
* Tests two lists for value-equality as per the equality contract in
* {@link java.util.List#equals(java.lang.Object)}.
* <p>
* This method is useful for implementing <code>List</code> when you cannot
* extend AbstractList. The method takes Collection instances to enable other
* collection types to use the List implementation algorithm.
* <p>
* The relevant text (slightly paraphrased as this is a static method) is:
* <blockquote>
* Compares the two list objects for equality. Returns
* <tt>true</tt> if and only if both
* lists have the same size, and all corresponding pairs of elements in
* the two lists are <i>equal</i>. (Two elements <tt>e1</tt> and
* <tt>e2</tt> are <i>equal</i> if <tt>(e1==null ? e2==null :
* e1.equals(e2))</tt>.) In other words, two lists are defined to be
* equal if they contain the same elements in the same order. This
* definition ensures that the equals method works properly across
* different implementations of the <tt>List</tt> interface.
* </blockquote>
*
* <b>Note:</b> The behaviour of this method is undefined if the lists are
* modified during the equals comparison.
*
* @see java.util.List
* @param list1 the first list, may be null
* @param list2 the second list, may be null
* @return whether the lists are equal by value comparison
*/
public static boolean isEqualList(final Collection list1, final Collection list2) {
if (list1 == list2) {
return true;
}
if (list1 == null || list2 == null || list1.size() != list2.size()) {
return false;
}
Iterator it1 = list1.iterator();
Iterator it2 = list2.iterator();
Object obj1 = null;
Object obj2 = null;
while (it1.hasNext() && it2.hasNext()) {
obj1 = it1.next();
obj2 = it2.next();
if (!(obj1 == null ? obj2 == null : obj1.equals(obj2))) {
return false;
}
}
return !(it1.hasNext() || it2.hasNext());
}
/**
* Generates a hash code using the algorithm specified in
* {@link java.util.List#hashCode()}.
* <p>
* This method is useful for implementing <code>List</code> when you cannot
* extend AbstractList. The method takes Collection instances to enable other
* collection types to use the List implementation algorithm.
*
* @see java.util.List#hashCode()
* @param list the list to generate the hashCode for, may be null
* @return the hash code
*/
public static int hashCodeForList(final Collection list) {
if (list == null) {
return 0;
}
int hashCode = 1;
Iterator it = list.iterator();
Object obj = null;
while (it.hasNext()) {
obj = it.next();
hashCode = 31 * hashCode + (obj == null ? 0 : obj.hashCode());
}
return hashCode;
}
//-----------------------------------------------------------------------
/**
* Returns a List containing all the elements in <code>collection</code>
* that are also in <code>retain</code>. The cardinality of an element <code>e</code>
* in the returned list is the same as the cardinality of <code>e</code>
* in <code>collection</code> unless <code>retain</code> does not contain <code>e</code>, in which
* case the cardinality is zero. This method is useful if you do not wish to modify
* the collection <code>c</code> and thus cannot call <code>collection.retainAll(retain);</code>.
*
* @param collection the collection whose contents are the target of the #retailAll operation
* @param retain the collection containing the elements to be retained in the returned collection
* @return a <code>List</code> containing all the elements of <code>c</code>
* that occur at least once in <code>retain</code>.
* @throws NullPointerException if either parameter is null
* @since Commons Collections 3.2
*/
public static List retainAll(Collection collection, Collection retain) {
List list = new ArrayList(Math.min(collection.size(), retain.size()));
for (Iterator iter = collection.iterator(); iter.hasNext();) {
Object obj = iter.next();
if (retain.contains(obj)) {
list.add(obj);
}
}
return list;
}
/**
* Removes the elements in <code>remove</code> from <code>collection</code>. That is, this
* method returns a list containing all the elements in <code>c</code>
* that are not in <code>remove</code>. The cardinality of an element <code>e</code>
* in the returned collection is the same as the cardinality of <code>e</code>
* in <code>collection</code> unless <code>remove</code> contains <code>e</code>, in which
* case the cardinality is zero. This method is useful if you do not wish to modify
* <code>collection</code> and thus cannot call <code>collection.removeAll(remove);</code>.
*
* @param collection the collection from which items are removed (in the returned collection)
* @param remove the items to be removed from the returned <code>collection</code>
* @return a <code>List</code> containing all the elements of <code>c</code> except
* any elements that also occur in <code>remove</code>.
* @throws NullPointerException if either parameter is null
* @since Commons Collections 3.2
*/
public static List removeAll(Collection collection, Collection remove) {
List list = new ArrayList();
for (Iterator iter = collection.iterator(); iter.hasNext();) {
Object obj = iter.next();
if (remove.contains(obj) == false) {
list.add(obj);
}
}
return list;
}
//-----------------------------------------------------------------------
/**
* Returns a synchronized list backed by the given list.
* <p>
* You must manually synchronize on the returned buffer's iterator to
* avoid non-deterministic behavior:
*
* <pre>
* List list = ListUtils.synchronizedList(myList);
* synchronized (list) {
* Iterator i = list.iterator();
* while (i.hasNext()) {
* process (i.next());
* }
* }
* </pre>
*
* This method uses the implementation in the decorators subpackage.
*
* @param list the list to synchronize, must not be null
* @return a synchronized list backed by the given list
* @throws IllegalArgumentException if the list is null
*/
public static List synchronizedList(List list) {
return SynchronizedList.decorate(list);
}
/**
* Returns an unmodifiable list backed by the given list.
* <p>
* This method uses the implementation in the decorators subpackage.
*
* @param list the list to make unmodifiable, must not be null
* @return an unmodifiable list backed by the given list
* @throws IllegalArgumentException if the list is null
*/
public static List unmodifiableList(List list) {
return UnmodifiableList.decorate(list);
}
/**
* Returns a predicated (validating) list backed by the given list.
* <p>
* Only objects that pass the test in the given predicate can be added to the list.
* Trying to add an invalid object results in an IllegalArgumentException.
* It is important not to use the original list after invoking this method,
* as it is a backdoor for adding invalid objects.
*
* @param list the list to predicate, must not be null
* @param predicate the predicate for the list, must not be null
* @return a predicated list backed by the given list
* @throws IllegalArgumentException if the List or Predicate is null
*/
public static List predicatedList(List list, Predicate predicate) {
return PredicatedList.decorate(list, predicate);
}
/**
* Returns a typed list backed by the given list.
* <p>
* Only objects of the specified type can be added to the list.
*
* @param list the list to limit to a specific type, must not be null
* @param type the type of objects which may be added to the list
* @return a typed list backed by the specified list
*/
public static List typedList(List list, Class type) {
return TypedList.decorate(list, type);
}
/**
* Returns a transformed list backed by the given list.
* <p>
* This method returns a new list (decorating the specified list) that
* will transform any new entries added to it.
* Existing entries in the specified list will not be transformed.
* <p>
* Each object is passed through the transformer as it is added to the
* List. It is important not to use the original list after invoking this
* method, as it is a backdoor for adding untransformed objects.
* <p>
* Existing entries in the specified list will not be transformed.
* If you want that behaviour, see {@link TransformedList#decorateTransform}.
*
* @param list the list to predicate, must not be null
* @param transformer the transformer for the list, must not be null
* @return a transformed list backed by the given list
* @throws IllegalArgumentException if the List or Transformer is null
*/
public static List transformedList(List list, Transformer transformer) {
return TransformedList.decorate(list, transformer);
}
/**
* Returns a "lazy" list whose elements will be created on demand.
* <p>
* When the index passed to the returned list's {@link List#get(int) get}
* method is greater than the list's size, then the factory will be used
* to create a new object and that object will be inserted at that index.
* <p>
* For instance:
*
* <pre>
* Factory factory = new Factory() {
* public Object create() {
* return new Date();
* }
* }
* List lazy = ListUtils.lazyList(new ArrayList(), factory);
* Object obj = lazy.get(3);
* </pre>
*
* After the above code is executed, <code>obj</code> will contain
* a new <code>Date</code> instance. Furthermore, that <code>Date</code>
* instance is the fourth element in the list. The first, second,
* and third element are all set to <code>null</code>.
*
* @param list the list to make lazy, must not be null
* @param factory the factory for creating new objects, must not be null
* @return a lazy list backed by the given list
* @throws IllegalArgumentException if the List or Factory is null
*/
public static List lazyList(List list, Factory factory) {
return LazyList.decorate(list, factory);
}
/**
* Returns a fixed-sized list backed by the given list.
* Elements may not be added or removed from the returned list, but
* existing elements can be changed (for instance, via the
* {@link List#set(int,Object)} method).
*
* @param list the list whose size to fix, must not be null
* @return a fixed-size list backed by that list
* @throws IllegalArgumentException if the List is null
*/
public static List fixedSizeList(List list) {
return FixedSizeList.decorate(list);
}
/**
* Finds the first index in the given List which matches the given predicate.
* <p>
* If the input List or predicate is null, or no element of the List
* matches the predicate, -1 is returned.
*
* @param list the List to search, may be null
* @param predicate the predicate to use, may be null
* @return the first index of an Object in the List which matches the predicate or -1 if none could be found
*/
public static int indexOf(List list, Predicate predicate) {
if (list != null && predicate != null) {
for (int i = 0; i < list.size(); i++) {
Object item = list.get(i);
if (predicate.evaluate(item)) {
return i;
}
}
}
return -1;
}
}
The table below shows all metrics for ListUtils.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 33.00 | Number of blocks | |
| BLOCK_COMMENT | 16.00 | Number of block comment lines | |
| COMMENTS | 277.00 | Comment lines | |
| COMMENT_DENSITY | 2.89 | Comment density | |
| COMPARISONS | 26.00 | Number of comparison operators | |
| CYCLOMATIC | 40.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 23.00 | Comments in declarations | |
| DOC_COMMENT | 258.00 | Number of javadoc comment lines | |
| ELOC | 96.00 | Effective lines of code | |
| EXEC_COMMENTS | 0.00 | Comments in executable code | |
| EXITS | 27.00 | Procedure exits | |
| FUNCTIONS | 17.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 50.83 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 50.00 | 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 | 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 | 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 | 1.00 | 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 | 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 | 0.00 | 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 | 5.00 | 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 | 0.00 | 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 | 440.00 | Number of lines in the source file | |
| LINE_COMMENT | 3.00 | Number of line comments | |
| LOC | 130.00 | Lines of code | |
| LOGICAL_LINES | 68.00 | Number of statements | |
| LOOPS | 7.00 | Number of loops | |
| NEST_DEPTH | 4.00 | Maximum nesting depth | |
| OPERANDS | 353.00 | Number of operands | |
| OPERATORS | 620.00 | Number of operators | |
| PARAMS | 28.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 973.00 | Halstead program length | |
| PROGRAM_VOCAB | 161.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 22.00 | Number of return points from functions | |
| SIZE | 17334.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 125.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 36.00 | Number of unique operators | |
| WHITESPACE | 33.00 | Number of whitespace lines | |