import java.awt.*;
import javax.swing.*;

class Img extends JComponent {
    private Image img;

    public Img() {
        // Chargement de l'image
        img = Toolkit.getDefaultToolkit().getImage("triangles-1430105_1280.png");
    }

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        if (img != null) {
            g.drawImage(img, 0, 0, this);
        }
    }

}

class Fenetre extends JFrame {
    public Fenetre() {
        this.setLocation(100, 100);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        Img imagePanel = new Img();
        this.add(imagePanel);
        
        this.pack(); // Ajuste la fenêtre à la taille du contenu
    }
}

public class Main {
    public static void main(String[] args) {
        Fenetre fenetre = new Fenetre();
        fenetre.setVisible(true);
    }
}