如何在Java中将图像彼此叠加

Question

I have a background image of a road, which I have displayed on a JFrame using an ImageIcon. I want to put a car on top of that background image at a certain (x,y) location.

I tried using another ImageIcon and the background does not appear when I run the program , however the car does.

import javax.swing.ImageIcon;

import javax.swing.JFrame;

import javax.swing.JLabel;

public class Gui extends JFrame {

private ImageIcon northcar = new ImageIcon("src/north.gif");
private ImageIcon usIcon = new ImageIcon("src/trafficLight.jpg");


public Gui() {
    add(new JLabel(usIcon)); // background image does not appear after the i added the northcar label
    add(new JLabel(northcar)); // this picture can be seen 


}

public static void main(String[] args) {


    Gui frame = new Gui();
    frame.setTitle("TestImageIcon");
    frame.setLocationRelativeTo(null); // Center the frame
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setBounds(0, 0, 650, 650);
    frame.setVisible(true);

}
}

I heard about using a canvas but have no clue. Any ideas ?

Many Thanks

Answer 1

如何使用LayeredPane ， 这可能帮助。

Answer 2

add(new JLabel(usIcon)); 
add(new JLabel(northcar)); 

Change the order to:

add(new JLabel(northcar)); 
add(new JLabel(usIcon)); 

Read up on Z-Order. Simply the last component added gets painted first.