Pemrograman Grapik

selamat pagi,
salam bahagia
kali ini saya akan membuat Program tentang Bola(Ball).

1. Perintah Ball:
   
   package Bola;
   import java.awt.Color;
   import java.awt.Graphics;
   import java.awt.Polygon;
   import java.awt.event.ActionEvent;
   import java.awt.event.ActionListener;
   import javax.swing.Timer;
   import javax.swing.JPanel;
   
   /**
    *
    * @author Aris
    */
   public class Ball extends JPanel {
   private int delay = 50;
   // Create a timer with delay 1000 ms
      protected Timer timer = new Timer(delay, new TimerListener());
   
      public int x = 0; private int y = 0; // Current ball position
      private int radius = 5; // Ball radius
      private int dx = 2; // Increment on ball's x-coordinate
      private int dy = 2; // Increment on ball's y-coordinate
   
      public Ball() {
        timer.start();
   }
       private class TimerListener implements ActionListener {
        /** Handle the action event */
        public void actionPerformed(ActionEvent e) {
          repaint();
   
        }
      }
      protected void paintComponent(Graphics g) {
        super.paintComponent(g);
   
        g.setColor(Color.ORANGE);
   
        // Check boundaries
        if (x < radius) dx = Math.abs(dx);
        if (x > getWidth() - radius) dx = -Math.abs(dx);
        if (y < radius) dy = Math.abs(dy);
        if (y > getHeight() - radius) dy = -Math.abs(dy);
   
        // Adjust ball position
           x += dx;
           y += dy;
           g.fillOval(x - radius, y - radius, radius * 2, radius * 2);
   
          Polygon anu=new Polygon();
          anu.addPoint(0, 0);
           anu.addPoint(x - radius, y - radius);
          g.drawPolygon(anu);
   
         
   }
   
   public void suspend() {
   timer.stop(); // Suspend timer
   }
   
   public void resume() {
   timer.start(); // Resume timer
   }
   
   public void setDelay(int delay) {
   this.delay = delay;
   timer.setDelay(delay);
      }
   
   }
    
2. Perintah BallControl:
   
   package Bola;
   import java.awt.BorderLayout;
   import java.awt.Color;
   import java.awt.event.ActionEvent;
   import java.awt.event.ActionListener;
   import java.awt.event.AdjustmentEvent;
   import java.awt.event.AdjustmentListener;
   import javax.swing.JButton;
   import javax.swing.JPanel;
   import javax.swing.JScrollBar;
   
   /**
    *
    * @author Aris
    */
   public class BallControl extends JPanel {
       private Ball ball = new Ball();
       private JButton jbtStop = new JButton("Stop");
       private JButton jbtResume = new JButton("Lanjut");
       private JScrollBar jsbDelay = new JScrollBar();
   
      public BallControl() {
            JPanel panel = new JPanel();
        panel.add(jbtStop);
        panel.add(jbtResume);
            ball.setBorder(new javax.swing.border.LineBorder(Color.red));
           jsbDelay.setOrientation(JScrollBar.HORIZONTAL);
        ball.setDelay(jsbDelay.getMaximum());
        setLayout(new BorderLayout());
        add(jsbDelay, BorderLayout.NORTH);
        add(ball, BorderLayout.CENTER);
        add(panel, BorderLayout.SOUTH);
   
         jbtStop.addActionListener(new ActionListener() {
          public void actionPerformed(ActionEvent e) {
            ball.suspend();
          }
        });
          jbtResume.addActionListener(new ActionListener() {
          public void actionPerformed(ActionEvent e) {
            ball.resume();
          }
        });
        jsbDelay.addAdjustmentListener(new AdjustmentListener() {
          public void adjustmentValueChanged(AdjustmentEvent e) {
            ball.setDelay(jsbDelay.getMaximum() - e.getValue());
          }
        });
      }
   }
   
3. Perintah BounceBallApp:
   package Bola;
   import javax.swing.JApplet;
   /**
    *
    * @author Aris
    */
   public class BounceBallApp extends JApplet{
      public BounceBallApp(){
           add(new BallControl());
      }
   }
   
4. Hasilnya: