Distinguish between a single click and a double click in Java

Sometime it prints out ” and it’s a single click!” 2 times . It should print out ” and it’s a double click!”).

That is normal. A double click only happens if you click twice within the specified time interval. So sometimes if you don’t click fast enough you will get two single clicks in a row.

Integer timerinterval = (Integer) Toolkit.getDefaultToolkit().getDesktopProperty("awt.multiClickInterval"); 

The above line of code determines how fast the double click must be.

For what its worth here is some code I have used to do the same thing. Don’t know if its any better or worse than the code you have:

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

public class ClickListener extends MouseAdapter implements ActionListener
{
    private final static int clickInterval = (Integer)Toolkit.getDefaultToolkit().
        getDesktopProperty("awt.multiClickInterval");

    MouseEvent lastEvent;
    Timer timer;

    public ClickListener()
    {
        this(clickInterval);
    }

    public ClickListener(int delay)
    {
        timer = new Timer( delay, this);
    }

    public void mouseClicked (MouseEvent e)
    {
        if (e.getClickCount() > 2) return;

        lastEvent = e;

        if (timer.isRunning())
        {
            timer.stop();
            doubleClick( lastEvent );
        }
        else
        {
            timer.restart();
        }
    }

    public void actionPerformed(ActionEvent e)
    {
        timer.stop();
        singleClick( lastEvent );
    }

    public void singleClick(MouseEvent e) {}
    public void doubleClick(MouseEvent e) {}

    public static void main(String[] args)
    {
        JFrame frame = new JFrame( "Double Click Test" );
        frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
        frame.addMouseListener( new ClickListener()
        {
            public void singleClick(MouseEvent e)
            {
                System.out.println("single");
            }

            public void doubleClick(MouseEvent e)
            {
                System.out.println("double");
            }
        });
        frame.setSize(200, 200);
        frame.setVisible(true);
     }
}