java/56_JLayeredPane at main · PeiHui369/java · GitHub

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// JLayeredPane = Swing container that provides a third dimension for positioning componnets ex. depth; Z-index
import javax.swing.*;
import java.awt.*;

public class Main{
    public static void main(String[] args){

        JLabel label1 = new JLabel();
        label1.setOpaque((true));
        label1.setBackground((Color.RED));
        label1.setBounds(50, 50, 200, 200);

        JLabel label2 = new JLabel();
        label2.setOpaque((true));
        label2.setBackground((Color.GREEN));
        label2.setBounds(100, 100, 200, 200);

        JLabel label3 = new JLabel();
        label3.setOpaque((true));
        label3.setBackground((Color.BLUE));
        label3.setBounds(150, 150, 200, 200);

        JLayeredPane layeredPane = new JLayeredPane();
        layeredPane.setBounds(0,0,500,500);

       /* layeredPane.add(label1, JLayeredPane.DEFAULT_LAYER);
        layeredPane.add(label2, JLayeredPane.DEFAULT_LAYER);
        layeredPane.add(label3, JLayeredPane.DRAG_LAYER); or below*/

        layeredPane.add(label1, Integer.valueOf(0));
        layeredPane.add(label2, Integer.valueOf(2));
        layeredPane.add(label3, Integer.valueOf(1));

        JFrame frame = new JFrame("JLayeredPane");

        frame.add(layeredPane);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(500,500);
        frame.setLayout(null);
        frame.setVisible(true);

    }
}