Timer wont stop...

Hi,
I made a timer, and it wont stop... I wanted it to only initiate the action once, so i setReapets(false) but it still just keeps on going. Even when i but timer.stop() it keeps on going... How do i fix this?

Code :

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import javax.swing.*;
import java.awt.*;
import javax.swing.Timer;
import java.awt.event.ActionEvent;
 
public class TimerTest
{
    public static void main(String[] args) {
        JFrame frame = new JFrame ("Timer Test");
        frame.setSize (400,400);
        JPanel panel = new JPanel();
        // make new action
        Action action = new AbstractAction() {
            public void actionPerformed (ActionEvent e){
                System.out.println ("hello");
    }
};
Timer timer;
timer = new Timer(5000, action);
timer.setRepeats(false);
System.out.println ("The timer has started");
timer.start();
timer.stop();
}
}

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I would use java.util.Timer.

It has scheduling methods for single use and repeated use.

Single use:

Code Java:

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Timer timer = new Timer();
		timer.schedule(new TimerTask()
		{
 
			@Override
			public void run()
			{
				//put code here
			}
		}, longDelay);

---

Repeat use:

Code Java:

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Timer timer = new Timer();
		timer.scheduleAtFixedRate(new TimerTask()
		{
 
			@Override
			public void run()
			{
				//put code here
			}
		}, longDelay, longPeriodBeforeRepeat);

---

The Swing Timer works fine. I ran that code, and it runs exactly how I'd expect- it prints "hello" once. Are you sure you're running this code? Try deleting any .class files, recompiling, and trying again.

Hey, I got it to work. I dont know what was wrong with it before, but when i switched computers it started working fine. However, i have moved to my home computer now instead of my school one and i use eclipse. Eclipse is giving me an error on AbstractAction saying that "The serializable class does not declare a static final serialVersionUID feild of type long". The code compiles and runs, but the action isnt working. So the timer starts (i think) but the action doesnt work...
Any advice?

That's not an error, it's just a warning, and it's pretty self-explanatory. It should not affect runtime behavior at all.

Hey, i downloaded BlueJ and my code worked in that, so there must be something wrong with my eclipse... Ill let you know if i figure it out...

Quote:

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Originally Posted by pottsiex5

Hey, i downloaded BlueJ and my code worked in that, so there must be something wrong with my eclipse... Ill let you know if i figure it out...

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I highly doubt it. You were probably just using an old .class file. Simply cleaning the project in eclipse would have probably done the trick, but you never followed my advice to delete the .class files and recompile.

I did take your advice and recompile it. Though i did find out that if i reduce the speed to anywhere below 1062 milliseconds it works... I also noticed in the title of the console it says terminated<TimerTest.java> before the 5 seconds are up, so it is ending the file before the timer has a chance to output the "hello"...

Quote:

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Originally Posted by pottsiex5

I did take your advice and recompile it. Though i did find out that if i reduce the speed to anywhere below 1062 milliseconds it works... I also noticed in the title of the console it says terminated<TimerTest.java> before the 5 seconds are up, so it is ending the file before the timer has a chance to output the "hello"...

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Yup, that would make sense. Try popping up a JFrame to keep the program going.