Here you can find the source of toBoolean(Object value)
public static boolean toBoolean(Object value)
//package com.java2s; /*/*from w w w .j a v a 2 s . 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 toBoolean(Object value) { if (null == value) { return false; } else if (Boolean.class.isInstance(value)) { Boolean b = (Boolean) value; return b.booleanValue(); } else { String s = value.toString(); return !"false".equals(s) && !"0".equals(s); } } }