import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
import javax.swing.JFrame;
public class MainClass extends JFrame {
private BufferedImage bi;
public static void main(String[] args) {
new MainClass().setVisible(true);
}
public MainClass() {
setDefaultCloseOperation(EXIT_ON_CLOSE);
try {
bi = ImageIO.read(new File("your.jpg"));
} catch (Exception e) {
e.printStackTrace();
}
setSize(bi.getWidth(), bi.getHeight());
}
public void paint(Graphics g) {
g.drawImage(bi, 0, 0, getWidth(), getHeight(), this);
}
}