How to close JFrame after user inactivity?

Question

How would I go about closing a JFrame after user inactivity?

So far I have,

Thread.sleep(10000);

I would greatly appreciate it if someone could give me code to do this?

I am new to Java and want to know more about system security

Answer 1

This is an example of Braj's idea using a javax.swing.Timer.

It simplifies the process, as you don't need to monitor the time between events and ensures that when the timer is triggered, the event occurs within the Event Dispatching Thread, further reducing the complexity.

Also note that I included the AWTEvent.MOUSE_MOTION_EVENT_MASK and AWTEvent.MOUSE_WHEEL_EVENT_MASK events for good measure ;)

import java.awt.AWTEvent;
import java.awt.Component;
import java.awt.EventQueue;
import java.awt.Toolkit;
import java.awt.Window;
import java.awt.event.AWTEventListener;
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;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

public class AutoClose {

    public static void main(String[] args) {
        new AutoClose();
    }

    private Timer timer;
    private JLabel label;
    private JFrame frame;

    public AutoClose() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                }

                label = new JLabel("Waiting...");
                frame = new JFrame("Testing");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.add(label);
                frame.setSize(200, 200);
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);

                Toolkit.getDefaultToolkit().addAWTEventListener(new AWTEventListener() {

                    private int count;

                    @Override
                    public void eventDispatched(AWTEvent event) {
                        Object source = event.getSource();
                        if (source instanceof Component) {
                            Component comp = (Component) source;
                            Window win = null;
                            if (comp instanceof Window) {
                                win = (Window) comp;
                            } else {
                                win = SwingUtilities.windowForComponent(comp);
                            }
                            if (win == frame) {
                                timer.restart();
                                label.setText("Interrupted..." + (++count));
                            }
                        }
                    }
                }, AWTEvent.KEY_EVENT_MASK | AWTEvent.MOUSE_EVENT_MASK | AWTEvent.MOUSE_MOTION_EVENT_MASK | AWTEvent.MOUSE_WHEEL_EVENT_MASK);

                timer = new Timer(5000, new ActionListener() {
                    @Override
                    public void actionPerformed(ActionEvent e) {
                        frame.dispose();
                    }
                });
                // You could use a WindowListener to start this
                timer.start();
            }
        });
    }

}

Answer 2

Try this one

Steps to follow:

• Its listening for key event as well as mouse event.
• A new thread is started that will check.
• If the time difference is more than specified time (10 sec in below sample code) then dispose the window.
• That's all.

Here is the sample code:

    private long time;

    ...

    long eventMask = AWTEvent.KEY_EVENT_MASK | AWTEvent.MOUSE_EVENT_MASK;

    Toolkit.getDefaultToolkit().addAWTEventListener(new AWTEventListener() {
        public void eventDispatched(AWTEvent e) {
            time = System.currentTimeMillis();
        }
    }, eventMask);

    time = System.currentTimeMillis();
    new Thread(new Runnable() {

        @Override
        public void run() {
            while (true) {
                if (System.currentTimeMillis() - time > 10000) {
                    widnow.dispose();
                    break;
                }
            }
        }
    }).start();