Make a Swing Timer execute N times?

Question

How can I adjust this Timer code so that it executes four times and then stops?

timer = new Timer(1250, new java.awt.event.ActionListener() {
    @Override
    public void actionPerformed(java.awt.event.ActionEvent e) {
         System.out.println("Say hello");
    }
});
timer.start();

can you be a bit more specific on what you are trying to do? elaborate more on the period of the timer. — Alexis Reyes, Apr 29 '13 at 13:57
Do you mean that you want your `ActionListener` to execute 4 times and then stop? — Guillaume Polet, Apr 29 '13 at 13:58
Sorry for my bad english fx = for example, I want the timer went just 4 times — JaLe29, Apr 29 '13 at 14:07
*"Sorry for my bad english"* It was not so much the English as the abbreviations, but I am satisfied. :) — Andrew Thompson, Apr 29 '13 at 14:09

Reimeus · Accepted Answer · 2013-04-29T14:59:42.067

3

You could do:

Timer timercasovac = new Timer(1250, new ActionListener() {
    private int counter;

    @Override
    public void actionPerformed(ActionEvent e) {
        System.out.println("Say hello");
        counter++;
        if (counter == 4) {
            ((Timer)e.getSource()).stop();
        }
    }
});
timercasovac.start();

edited Apr 29 '13 at 14:59

answered Apr 29 '13 at 13:54

Reimeus

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score 2 · Answer 2 · answered Apr 29 '13 at 14:09

You need to count yourself and then stop the Timer manually:

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.SwingUtilities;
import javax.swing.Timer;

public class TestTimer {

    private int count = 0;
    private Timer timer;
    private JLabel label;

    private void initUI() {
        JFrame frame = new JFrame("test");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        label = new JLabel(String.valueOf(count));
        frame.add(label);
        frame.pack();
        frame.setVisible(true);
        timer = new Timer(1250, new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                if (count < 4) {
                    count++;
                    label.setText(String.valueOf(count));
                } else {
                    timer.stop();
                }
            }
        });
        timer.start();
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                new TestTimer().initUI();
            }
        });
    }

}

Make a Swing Timer execute N times?

2 Answers2