设置MouseListener

Question

我正在编写一个二十一点程序，我正在尝试为我拥有的标签设置MouseListener，但我无法让它工作。我在StackOverflow上查看了许多网站和其他人的问题，但是没有一个是有用的，或者我无法正确使用它们。为什么这段代码不起作用：

JLabel lbl1 = new JLabel(new ImageIcon("C:\\Users\\rawlc\\Pictures\\kings1.jpg"));
lbl1.addMouseListener(new MouseListener() {
    @Override
    public void mouseClicked(MouseEvent e) {
        if (mode == false)
            if (bet > 0)
                bet -= 1;
        else
            if (bank > bet + 1)
                bet += 1;
        lblBet1.setText(String.valueOf(bet));
        if (bet == 0)
            btnMode.setEnabled(false);
        else
            btnMode.setEnabled(true);
    }

    @Override
    public void mousePressed(MouseEvent me) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    @Override
    public void mouseReleased(MouseEvent me) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    @Override
    public void mouseEntered(MouseEvent me) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    @Override
    public void mouseExited(MouseEvent me) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }
});
c.gridy = 2;
c.gridx = 0;
panel4.add(lbl1, c);

Answer 1

当您使用MouseListener方法mouseEntered时，会在致电mouseClicked之前致电。尝试使用MouseAdapter示例：

       label.addMouseListener(new MouseAdapter() {
           @Override
            public void mouseClicked(MouseEvent e) {
                System.out.println(".mouseClicked()");
            }

        });

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