java - How to display a picture on JFrame? -

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i'm doing exercise i'm supposed write program simulates race between 2 cars.

i've created jframe , added 2 rectangles supposed tracks.

but can't insert cars. have googled , tried solutions doesn not work out.

here code. 

public class race extends jcomponent { private imageicon image; public void paint(graphics g) {     g.setcolor(color.gray);     g.fill3drect(30, 150, 530, 55,true);     g.setcolor(color.gray);     g.fill3drect(30, 250, 530, 55, true);     g.setcolor(color.black);     g.fill3drect(90, 130, 12, 189, true); } public static void main(string[] a) {     jframe window = new jframe();     window.setpreferredsize(new dimension(600, 400));     window.getcontentpane().setbackground(color.green);     window.setresizable(false);     window.setdefaultcloseoperation(jframe.exit_on_close);     window.getcontentpane().add(new race());     window.pack();     window.setvisible(true); } }

where , how can add 2 pictures?

thanks

this how add image jframe 

frame.add(new jlabel(new imageicon("path/to/your/image.png")));

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