Here you can find the source of toBoolean(String flag)
private static Boolean toBoolean(String flag) throws IllegalArgumentException
//package com.java2s; /**// w ww.j a v a2 s . c o m * Copyright 2012 The Kuali Foundation Licensed under the * Educational Community 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.osedu.org/licenses/ECL-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. * * Created by Mezba Mahtab on 7/12/12 */ public class Main { /** * Converts a one-char Y/N String to Boolean. */ private static Boolean toBoolean(String flag) throws IllegalArgumentException { if ("Y".equals(flag)) { return true; } if ("N".equals(flag)) { return false; } throw new IllegalArgumentException("Flag should be Y/N"); } }