TImage für Java

[Christian18]

hier mein code:

Code:

import javax.swing.JFrame;
import javax.swing.JLabel;
import java.awt.Graphics;

public class test {
    private JFrame f;
    private JLabel l;
    
    public test() {
        f = new JFrame("Test");
        l = new JLabel();
        
        f.setSize(1000, 700);
        f.setLayout(null);

        l.setBounds(10, 10, 400, 300);
        
        f.getContentPane().add(l);
        
        zeichne(l.getGraphics());
        
        f.setVisible(true);
    }
    
    public void zeichne(Graphics g) {
        g.drawLine(0, 0, 100, 100);
    }
    
    public static void main(String[] args) {
        new test();
    }
}