Put JLabel in front of Graphics 2D Rectangle in JPanel

问题

Is there any way to put the JLabel in front of the rectangle? Currently, the JLabel is underneath the rectangle.

Here is my relevant code:

public class MainMenu_South extends JPanel {
        MainMenu_BlueJay t; 
        JLabel start=new JLabel("START");

    @Override
    public void paint(Graphics g) {
        super.paint(g);
        Graphics2D g2d = (Graphics2D) g;
        g2d.setColor(Color.blue);
        g2d.drawRect(0, 30, 900, 30); 
        g2d.fillRect(0, 30, 900, 30);
    }

    public MainMenu_South(MainMenu_BlueJay t){

        setLayout(null);
        this.t=t;
        setBackground(Color.white);

        start.setForeground(Color.red);
        start.setFont(new Font("Arial", Font.BOLD, 16));

        add(start);
        start.setBounds(100, 10, 100, 50);
        start.addMouseListener(ml);
    }

    MouseListener ml=new MouseListener() {

        @Override
        public void mouseEntered(MouseEvent e) {//hover
           start.setForeground(Color.white);
        }

        @Override
        public void mouseExited(MouseEvent e) {
            start.setForeground(Color.red);
        }
    };

}

回答1:

for better help sooner post an MCVE
use paintComponent() for Swing JComponents instead of paint()
there isn't reason to use NullLayout, use LayoutManager,
override getPreferredSize for JPanel, then JFrame.pack() will generate expected Dimension on the screen
JLabel is transparent, you have to setOpaque if you to want to dispaly Color as Backgroung in Jlabel
you have to use repaint(last code line) for MouseEvents and Color for JLabel, override MouseAdapter
miss any, no idea if you would need use transparency or tranclucency, or remove the JLabel

来源：https://stackoverflow.com/questions/21076693/put-jlabel-in-front-of-graphics-2d-rectangle-in-jpanel

标签

java

swing

panel

graphics2d