java - Java SWING 程序中的事件调度线程

Question

我完全是Java新手。我想制作一个动画。但我没有成功。 mouseClicked() 将在事件调度线程中执行。为什么不起作用？事件派发会不会被其他线程占用，其他什么线程？

public class DemoThreadGUI {

    public static void main(String [] args) {
        DemoThreadGUI app = new DemoThreadGUI();
        app.go();
    }

    public void go() {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                generateGUI();
            }
        });     
    }
    public void generateGUI() {
        JFrame frame = new JFrame("Demo");
        frame.add(new MyPanel());
        frame.pack();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }

    class MyPanel extends JPanel implements MouseListener {
        private int x,y;
        private int r;
        public MyPanel() {
            this.setPreferredSize(new Dimension(100,100));
            this.addMouseListener(this);
            x = 50;
            y = 50;
            r = 25;
        }
        public void paintComponent(Graphics g) {
            super.paintComponent(g);
            g.fillOval(x-r,y-r,r*2,r*2);
        }

        public void mouseClicked(MouseEvent event) {
            int targetX = event.getX();
            int targetY = event.getY();
            for(int i=0;i<10;++i) {
                x = (x+targetX)/2;
                y = (y+targetY)/2;
                repaint();
                try {
                    Thread.sleep(100);
                } catch (InterruptedException e) { }
            }
        }

        public void mouseEntered(MouseEvent event) {}
        public void mouseExited(MouseEvent event) {}
        public void mousePressed(MouseEvent event) {}
        public void mouseReleased(MouseEvent event) {}

    }

}

Answer 1

在 mouseClicked() 中启动一个新线程并将代码放入线程中

       for(int i=0;i<10;++i) {
            x = (x+targetX)/2;
            y = (y+targetY)/2;
            repaint();
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) { }
        }

repaint() 调用应包装到 SwingUtilities.invokeAndWait() 中以将控制权传递给 EDT