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Swing Timer Demo
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.Timer;
/*
* SwingTimerDemo.java
*
* Created on May 2, 2007, 3:25 PM
*
* Copyright (c) 2007, Sun Microsystems, Inc
* 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 the TimingFramework project nor 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.
*/
/**
*
* @author Chet
*/
public class SwingTimerDemo implements ActionListener {
private static long prevTime = 0;
private static long startTime = 0;
private static final int DELAY = 100;
private static final int DURATION = 5 * DELAY;
private static final int PROCESSING_TIME = 30;
private static final long INITIAL_PROCESSING_TIME = 2 * DELAY;
private static Timer timer = null;
private boolean firstTime = true;
/**
* This method will be called during every tick of the Timers.
* We insert an artificial delay each time, to simulate some processing.
* The first time through, this delay is greater than the delay between
* timing events, so that we can see how this hiccup is handled by
* fixed-rate and fixed-delay timers.
*/
public void actionPerformed(ActionEvent ae) {
long nowTime = System.currentTimeMillis();
long elapsedTime = nowTime - prevTime;
long totalTime = nowTime - startTime;
System.out.println("Elapsed time = " + elapsedTime);
if (totalTime > DURATION) {
timer.stop();
}
prevTime = nowTime;
try {
if (firstTime) {
Thread.sleep(INITIAL_PROCESSING_TIME);
firstTime = false;
} else {
Thread.sleep(PROCESSING_TIME);
}
} catch (Exception e) {}
}
public SwingTimerDemo() {
firstTime = true;
}
public static void main(String[] args) {
// Run a default fixed-delay timer
timer = new Timer(DELAY, new SwingTimerDemo());
startTime = prevTime = System.currentTimeMillis();
System.out.println("Fixed Delay Times");
timer.start();
// Sleep for long enough that the first timer ends
try {
Thread.sleep(DURATION*2);
} catch (Exception e) {}
// Run a timer with no coalescing to get fixed-rate behavior
timer = new Timer(DELAY, new SwingTimerDemo());
startTime = prevTime = System.currentTimeMillis();
timer.setCoalesce(false);
System.out.println("
Fixed Rate Times");
timer.start();
}
}
