Here you can find the source of valueOf(final Boolean value)
public static boolean valueOf(final Boolean value)
//package com.java2s; /*// ww w . j a va 2 s . c o m This file is part of Cyclos. Cyclos is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. Cyclos is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Cyclos; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ public class Main { /** * Returns false when the value is null. Otherwise, value.booleanValue() */ public static boolean valueOf(final Boolean value) { return value == null ? false : value.booleanValue(); } /** * Returns 0 when the value is null. Otherwise, value.intValue() */ public static int valueOf(final Integer value) { return value == null ? 0 : value.intValue(); } }