Here you can find the source of beep()
public static void beep()
//package com.java2s; /***************************************************************************** * This file is part of Rinzo/*from w ww . j a v a 2 s . c o m*/ * * Author: Claudio Cancinos WWW: https://sourceforge.net/projects/editorxml Copyright (C): 2008, Claudio Cancinos * * This program is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General * Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any * later version. * * This program 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 Lesser General Public License along with this program; If not, see * <http://www.gnu.org/licenses/> ****************************************************************************/ import java.awt.Toolkit; public class Main { public static void beep() { Toolkit.getDefaultToolkit().beep(); } }