GrafikMain.java

package de.klg71;

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

public class GrafikMain {
  public static void main(String... args) {
    JFrame frame = new JFrame("My Drawing");
    Canvas canvas = new Zeichnung();
    canvas.setSize(400, 400);
    frame.add(canvas);
    frame.pack();
    frame.setVisible(true);
  }
}