soal_1 uts2

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package uts_105314069;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.GeneralPath;
import java.util.Random;
import javax.swing.JPanel;

/**
 *
 * @author admin
 */
public class Soal_1 extends JPanel {
   // draw general paths
    @Override
   public void paintComponent( Graphics g )
   {
      super.paintComponent( g ); // call superclass's paintComponent
      Random random = new Random(); // get random number generator
     
      int xPoints[] = { 0,60,60,0 };
      int yPoints[] = { 0,0,60,60};
      Graphics2D g2d = ( Graphics2D ) g;
      GeneralPath star = new GeneralPath(); // create GeneralPath object
     
      star.moveTo( xPoints[ 0 ], yPoints[ 0 ] );

      // create the star--this does not draw the star
      for ( int count = 1; count < xPoints.length; count++ )
         star.lineTo( xPoints[ count ], yPoints[ count ] );

      star.closePath(); // close the shape

      g2d.translate( 200, 200 ); // translate the origin to (200, 200)

      // rotate around origin and draw stars in random colors
      for ( int count = 1; count <= 18; count++ )
      {
         g2d.rotate( Math.PI / 4.0 ); // rotate coordinate system

         // set random drawing color
         g2d.setColor( new Color( random.nextInt( 256 ),
            random.nextInt( 256 ), random.nextInt( 256 ) ) );

         g2d.fill( star ); // draw filled star
      } // end for
   } // end method paintComponent
} // end class Shapes2JPanel

kelas Main

/*
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package uts_105314069;

import java.awt.Color;
import javax.swing.JFrame;

/**
 *
 * @author admin
 */
public class Tes_Soal_1 extends Thread {
    // execute application

    private static Soal_1 shapes2JPanel;

    public static void main(String args[]) {
        // create frame for Shapes2JPanel
        JFrame frame = new JFrame("Drawing 2D");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        shapes2JPanel = new Soal_1();
        frame.add(shapes2JPanel); // add shapes2JPanel to frame
        frame.setBackground(Color.WHITE); // set frame background color
        frame.setSize(400, 400); // set frame size
        frame.setVisible(true); // display frame
        Tes_Soal_1 sh = new Tes_Soal_1();
        sh.start();
    } // end main

    @Override
    public void run() {
        while (true) {
            try {
                Tes_Soal_1.sleep(500);
            } catch (InterruptedException ie) {
                break;
            }
            shapes2JPanel.repaint();
        }
    }
} // end class Shapes2