Java Assignment

Drwawing Polygon with java

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Polygon extends JFrame {
  public Polygon() {
    setSize(400, 500);
    setLayout(null);
    setVisible(true);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setTitle("Drawing Polygons");
  }
  public void paint(Graphics g) {
    int [] x = {200, 400, 450, 400, 200, 150};
    int [] y = {50, 50, 150, 250, 250, 150};
    g.drawPolygon(x, y, 6);
  }
  public static void main (String [] args) {
    new Polygon();
    System.out.println("Hello java");
  }
}