import java.awt.*;
import java.awt.event.*;

class GraphTest01 extends Frame {
  GraphTest01(String s) {
    super(s);
    setBounds(0, 0, 500, 300);
    setVisible(true);
  }

  public void paint(Graphics g) {
    Dimension d = getSize();
    int dx = d.width / 20, dy = d.height / 20;
    int myWidth = 250, myHeight = 250;
    g.drawLine(0, 0, myWidth, myHeight);
    g.drawLine(0, 0, d.width, d.height);
    setBackground(Color.blue);
    setForeground(Color.red);
  }
  
  public static void main(String[] args) {
    GraphTest01 f = new GraphTest01("Пример рисования");
    f.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent ev) {
        System.exit(0);
      }
    });
  }
}