Here you can find the source of booleanValue(Object arg)
public static boolean booleanValue(Object arg)
//package com.java2s; /**/*from w w w . j a v a 2s .c o m*/ * 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 booleanValue(Object arg) { if (arg instanceof Boolean) return ((Boolean) arg).booleanValue(); else return Boolean.parseBoolean(arg.toString()); } }