Question

我正在制作一个需要用户输入鼠标的程序，因此我创建了一个扩展MouseAdapter的Mouse类。通过单击窗口进行测试时，它什么也没做。代码如下。任何帮助表示赞赏。

主类

public class Main extends JFrame {

    private static final long serialVersionUID = 1L;

    public Main() {
        add(new Window());

        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(720, 480);
        setLocationRelativeTo(null);
        setTitle("Mouse Input");
        setVisible(true);
        setResizable(false);
    }

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

}

窗口类

public class Window extends JPanel implements ActionListener {

    private static final long serialVersionUID = 1L;

    public Window() {       
        addMouseMotionListener(new Mouse());

        Timer timer = new Timer(10, this);
        timer.start();

    }

    @Override
    public void actionPerformed(ActionEvent arg0) {

    }

}

鼠标类

class Mouse extends MouseAdapter{

    public void mouseClicked(MouseEvent e) {
        System.out.println("Clicked");
    }

    public void mouseDragged(MouseEvent e) {
        System.out.println("Dragged");
    }

}

Answer 1

它在点击时不会执行任何操作，因为您已将其作为MouseMotionListener添加到JPanel但不是作为MouseListener添加。您还需要通过addMouseListener(...)方法将Mouse实例传递到JPanel，以便发生MouseListener事件。

即，

public Window() {
  Mouse myMouse = new Mouse();
  addMouseMotionListener(myMouse); // you already have this
  addMouseListener(myMouse);  // **** add this!! ****

Answer 2

addMouseMotionListener（new Mouse（））; addMouseListener（new MouseListener（）{

        @Override
        public void mouseReleased(MouseEvent arg0) {
            // TODO Auto-generated method stub

        }

        @Override
        public void mousePressed(MouseEvent arg0) {
            // TODO Auto-generated method stub

        }

        @Override
        public void mouseExited(MouseEvent arg0) {
            // TODO Auto-generated method stub

        }

        @Override
        public void mouseEntered(MouseEvent arg0) {
            // TODO Auto-generated method stub

        }

        @Override
        public void mouseClicked(MouseEvent arg0) {
            System.out.println("asdasd");

        }
    });

Eclipse Java中未检测到鼠标输入

2 个答案: