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commons-lang-2.6.jar - Apache Commons Lang
commons-lang-2.6.jar is the JAR file for Apache Commons Lang 2.6, which provides a host of helper utilities for the java.lang API.
JAR File Size and Download Location:
File name: commons-lang-2.6.jar File size: 284220 bytes Date modified: 01/13/2011 Download: Apache Commons Lang Website
✍: FYIcenter
⏎ org/apache/commons/lang/builder/IDKey.java
/* * 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.builder; // adapted from org.apache.axis.utils.IDKey /** * Wrap an identity key (System.identityHashCode()) * so that an object can only be equal() to itself. * * This is necessary to disambiguate the occasional duplicate * identityHashCodes that can occur. * * @author Apache Software Foundation */ final class IDKey { private final Object value; private final int id; /** * Constructor for IDKey * @param _value The value */ public IDKey(Object _value) { // This is the Object hashcode id = System.identityHashCode(_value); // There have been some cases (LANG-459) that return the // same identity hash code for different objects. So // the value is also added to disambiguate these cases. value = _value; } /** * returns hashcode - i.e. the system identity hashcode. * @return the hashcode */ public int hashCode() { return id; } /** * checks if instances are equal * @param other The other object to compare to * @return if the instances are for the same object */ public boolean equals(Object other) { if (!(other instanceof IDKey)) { return false; } IDKey idKey = (IDKey) other; if (id != idKey.id) { return false; } // Note that identity equals is used. return value == idKey.value; } }
⏎ org/apache/commons/lang/builder/IDKey.java
⇒ commons-lang-1.0.1.jar - Apache Commons Lang
⇐ What Is commons-lang3-3.1.jar
2009-12-24, 76015👍, 0💬
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