Distinguish between single click and double click in Java

I searched the forum and saw this Code:

public void mouseClicked(MouseEvent e) {
            if (e.getClickCount() == 2) {
                System.out.println("  and it's a double click!");
                wasDoubleClick = true;
            } else {
                Integer timerinterval = (Integer) Toolkit.getDefaultToolkit().getDesktopProperty(
                        "awt.multiClickInterval");
                timer = new Timer(timerinterval.intValue(),new ActionListener() {

                    public void actionPerformed(ActionEvent evt) {
                        if (wasDoubleClick) {
                            wasDoubleClick = false; // reset flag
                        } else {
                            System.out.println("  and it's a simple click!");
                        }
                    }
                });
                timer.setRepeats(false);

                timer.start();
            }

        }

But the code does not run correctly (sometimes it prints out, it only needs one click! "2 times, it should print out, this is double click!") Can someone tell me why, or can you give me some better ways to do it? thank you!

Solution

This is normal. Double clicking occurs only when you click twice within the specified time interval So sometimes if you don't click fast enough, you get two single clicks

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

The above line of code determines how fast double clicking must be

Why its value here is some code I've done the same thing Don't know if it's 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);
     }
}