Java tutorial
/* * Copyright 2000-2013 Enonic AS * http://www.enonic.com/license */ package com.enonic.cms.core.structure; import java.io.Serializable; import org.apache.commons.lang.builder.HashCodeBuilder; import com.enonic.cms.core.AbstractIntegerBasedKey; public class SiteKey extends AbstractIntegerBasedKey implements Serializable { public SiteKey(String key) { init(key); } public SiteKey(int key) { init(key); } public SiteKey(Integer key) { init(key); } public boolean equals(Object o) { if (this == o) { return true; } if (o == null || getClass() != o.getClass()) { return false; } SiteKey key = (SiteKey) o; return intValue == key.intValue; } public int hashCode() { final int initialNonZeroOddNumber = 657; final int multiplierNonZeroOddNumber = 461; return new HashCodeBuilder(initialNonZeroOddNumber, multiplierNonZeroOddNumber).append(intValue) .toHashCode(); } }