image_background_dekstop

//buat class baru bernama BackgroundDekstop dan sesuaikan script dengan yang di bawah
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package image;

import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import javax.swing.ImageIcon;
import javax.swing.JDesktopPane;

/**
 *
 * @author root
 */
public class BackgroundDekstop extends JDesktopPane{
    @Override
    protected void paintComponent(Graphics g) {
        Graphics2D graphics = (Graphics2D) g.create();
        Image img = new ImageIcon(getClass().getResource("background.jpg")).getImage();
        graphics.drawImage(img, 0, 0, getWidth(), getHeight(), null);
        graphics.dispose();
    }
}


//untuk mengaplikasikan script diatas, klik kanan jdekstop pane -> customize code -> ubah line pertama menjadi Main_Desktop = new BackgroundDekstop(); , jangan lupa setting combo box di kiri menjadi customize code