Java Swing:在应用程序的JFrame上跟随鼠标光标的“永久工具提示”提示

JFrame frame = new JFrame("My Application");

frame.setLayout(new BorderLayout());

JLabel label = new JLabel("Hello World");
JToolTip toolTip = new JToolTip();

label.setToolTipText("This is a tooltip");
label.setComponentTipped(toolTip);

label.addMouseListener(new MouseAdapter() {
    @Override
    public void mouseEntered(MouseEvent e) {
        // 显示工具提示
        toolTip.setTipText(label.getToolTipText());
        toolTip.setLocation(e.getLocationOnScreen());
        toolTip.setVisible(true);
    }

    @Override
    public void mouseExited(MouseEvent e) {
        // 隐藏工具提示
        toolTip.setVisible(false);
    }
});

frame.add(label, BorderLayout.CENTER);
frame.setSize(400, 300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);