Here you can find the source of compare(String str1, String str2)
public static boolean compare(String str1, String str2)
//package com.java2s; /*/*from w w w. ja va 2 s . c o m*/ * Copyright (C) 2013 kk-team.com. * * Licensed 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. */ public class Main { public static boolean compare(String str1, String str2) { return (str1 == null || str2 == null) ? str1 == str2 : str1 .equals(str2); } }