java - 用户不 Activity 后如何关闭JFrame？

用户不活动后如何关闭JFrame？

到目前为止，

Thread.sleep(10000);

如果有人可以给我代码来执行此操作，我将不胜感激？

我是Java新手，想进一步了解系统安全性

最佳答案

这是Braj使用javax.swing.Timer的想法的示例。

由于您不需要监视事件之间的时间，因此可以简化流程，并确保在触发计时器时，事件发生在事件调度线程中，从而进一步降低了复杂性。

另请注意，为方便起见，我加入了AWTEvent.MOUSE_MOTION_EVENT_MASK和AWTEvent.MOUSE_WHEEL_EVENT_MASK事件;）

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();
            }
        });
    }

}