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import javax.swing.ImageIcon;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

class MyFrame extends JFrame {

JButton bu;

ImageIcon icon1;

ImageIcon icon2;

ImageIcon icon3;

MyFrame() throws InterruptedException {

bu = new JButton();

icon1 = new ImageIcon("1.png");

icon2 = new ImageIcon("2.png");

icon3 = new ImageIcon("3.png");

setSize(600, 400);

setVisible(true);

JPanel panel = new JPanel();

panel.add(bu);

add(panel);

showImage();

}

public void showImage() throws InterruptedException {

bu.setIcon(icon1);

Thread.sleep(1000);

bu.setIcon(icon3);

}

}

public class CircleTest extends JFrame {

public static void main(String[] args) throws InterruptedException {

MyFrame ct = new MyFrame();

}

}