Here you can find the source of randomChar()
public static char randomChar()
//package com.java2s; /**/*ww w.j av a 2 s . co m*/ * Copyright [2012] [Datasalt Systems S.L.] * * 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 char randomChar() { return (char) (int) (Math.random() * 26.0D + 97.0D); } }