Here you can find the source of valueOf(String value, boolean defaultValue)
public static boolean valueOf(String value, boolean defaultValue)
//package com.java2s; /**/* www. j a v a 2 s . c om*/ * The MIT License (MIT) * Copyright (c) 2009-2015 HONG LEIMING * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ public class Main { public static String valueOf(String value, String defaultValue) { if (value == null) return defaultValue; return value; } public static int valueOf(String value, int defaultValue) { if (value == null) return defaultValue; return Integer.valueOf(value); } public static boolean valueOf(String value, boolean defaultValue) { if (value == null) return defaultValue; return Boolean.valueOf(value); } }