鼠標監聽事件MouseListener

public class Demo extends JFrame {
    private JTextArea textArea;

    public Demo() {
        setBounds(100, 100, 470, 300);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        Container c = getContentPane();
        c.setLayout(null);

        JLabel label1 = new JLabel("鼠標事件區域");
        label1.setBounds(284, 37, 160, 20);
        c.add(label1);

        JLabel label = new JLabel();
        label.setBounds(244, 57, 160, 141);
        label.setBorder(BorderFactory.createLineBorder(Color.RED));
        c.add(label);

        textArea = new JTextArea();//創建文本域
        JScrollPane scrollPane = new JScrollPane(textArea);//滾動面板
        scrollPane.setBounds(20, 30, 190, 190);
        c.add(scrollPane);

        label.addMouseListener(new MyMouseEvent());//調用自定義方法類

        setVisible(true);
    }

    //在MyMouseEvent上，Alt+Ins，快速創建方法。
    class MyMouseEvent implements MouseListener {
        @Override
        public void mouseClicked(MouseEvent e) {
            int btn = e.getButton();//獲取鼠標按鍵
            switch (btn) {
                case MouseEvent.BUTTON1:
                    textArea.append("鼠標左鍵被點擊\n");
                    break;
                case MouseEvent.BUTTON2:
                    textArea.append("鼠標滾輪被點擊\n");
                    break;
                case MouseEvent.BUTTON3:
                    textArea.append("鼠標右鍵被點擊\n");
                    break;
            }
            int count = e.getClickCount();
            textArea.append("鼠標被點擊了" + count + "次\n");
        }

        public void mousePressed(MouseEvent e) {
            textArea.append("鼠標被按下\n");
        }

        public void mouseReleased(MouseEvent e) {
            textArea.append("鼠標被釋放\n");
        }

        public void mouseEntered(MouseEvent e) {
            textArea.append("鼠標進入區域\n");
        }

        public void mouseExited(MouseEvent e) {
            textArea.append("鼠標離開區域\n");
        }
    }

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