Mine

import javax.swing.*;import javax.swing.JFrame;import javax.swing.event.*; import java.awt.*;import java.awt.event.*;import java.awt.Graphics;import java.awt.Color;/** * * @author phunk */public class Swtest extends JFrame{        /** Creates a new instance of Main */    public Swtest() {        setTitle("Malen und so");        setSize(800,600);        setVisible(true);    }    public void paint(Graphics g) {        g.setColor(Color.BLACK);        g.drawLine(0,300,800,300);        repaint();    }        /**     * @param args the command line arguments     */    public static void main(String[] args) {        new Swtest();                // TODO code application logic here    }    }