Create Beeper controlled by Timer - Java Swing

Java examples for Swing:Timer

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Description

Create Beeper controlled by Timer

Demo Code

/*//from w  w w.j  a va2  s. c  o m
 * Beeper2.java is a version of the 1.4 Beeper.java example
 * that allows the user to select from 1 to 10 beeps and then
 * beeps that many times when the ClickMe button is pressed.
 * This solution uses a JSpinner to select the number of beeps.
 * Your solution could use a different widget, such as a combo
 * box or a group of radio buttons.
 */

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public class Beeper2 extends JPanel implements ActionListener {
    JButton button;
    SpinnerNumberModel beepsModel;
    javax.swing.Timer timer;
    final static String BUTTON_CMD = "Button";
    int beepsRemaining;

    public Beeper2() {
        super(new BorderLayout());

        //Create and set up the spinner.
        String numBeepsString = "Number of Beeps: ";
        beepsModel = new SpinnerNumberModel(1, 1, 10, 1);
        JLabel numBeepsLabel = new JLabel(numBeepsString);
        add(numBeepsLabel, BorderLayout.PAGE_START);
        JSpinner spinner = new JSpinner(beepsModel);
        numBeepsLabel.setLabelFor(spinner);
        add(spinner, BorderLayout.CENTER);

        button = new JButton("Click Me");
        button.setPreferredSize(new Dimension(200, 80));
        add(button, BorderLayout.PAGE_END);
        button.setActionCommand(BUTTON_CMD);
        button.addActionListener(this);
    }

    public void actionPerformed(ActionEvent e) {
        if (BUTTON_CMD.equals(e.getActionCommand())) {
            startBeeping(beepsModel.getNumber().intValue());
        } else { //called by the Timer
            Toolkit.getDefaultToolkit().beep();
            if (--beepsRemaining < 1) {
                timer.stop();
            }
        }
    }

    private void startBeeping(int numBeeps) {
        Toolkit.getDefaultToolkit().beep();

        if (numBeeps > 1) {
            if (timer == null) {
                timer = new Timer(500, this);
            }
            beepsRemaining = numBeeps - 1;
            timer.start();
        }
    }

    /**
     * Create the GUI and show it.  For thread safety,
     * this method should be invoked from the
     * event-dispatching thread.
     */
    private static void createAndShowGUI() {
        //Create and set up the window.
        JFrame frame = new JFrame("Beeper2");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        //Create and set up the content pane.
        JComponent newContentPane = new Beeper2();
        newContentPane.setOpaque(true); //content panes must be opaque
        frame.setContentPane(newContentPane);

        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        //Schedule a job for the event-dispatching thread:
        //creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
}

/*
 * Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle or the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

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