Change JFrame image icon : ImageIcon « 2D Graphics « Java Tutorial

1. Java Tutorial
2. 2D Graphics
3. ImageIcon

import java.awt.Dimension;
import java.awt.image.BufferedImage;

import javax.imageio.ImageIO;
import javax.swing.JFrame;

public class Main extends JFrame {
  public static void main(String[] args) throws Exception {
    Main frame = new Main();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    frame.setSize(new Dimension(300, 200));
    BufferedImage image = ImageIO.read(frame.getClass().getResource("/colors.jpg"));
    frame.setIconImage(image);
    frame.setVisible(true);
  }
}