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  1. import java.awt.*;
  2. import javax.swing.*;
  3. import java.awt.event.*; 
  4. public  class SunPanel extends JPanel implements ActionListener{
  5.   int width = 700; int height = 300;
  6.   int delay = 50;
  7.   JButton starter = new JButton("Start");
  8.   Timer ticker = new Timer(delay,this); 
  9.   int x = 0; int y = 300; int r = 50;
  10.  
  11.   public SunPanel(){
  12.     setPreferredSize(new Dimension(width,height));
  13.     this.add(starter);
  14.     starter.addActionListener(this);
  15.   }
  16.  
  17.   public void paintComponent(Graphics g){
  18.     super.paintComponent(g);
  19.     g.setColor(Color.yellow);
  20.     g.fillOval(x,y,r,r);
  21.   }
  22.  
  23.   public void actionPerformed(ActionEvent e){ 
  24.       if(x<250){
  25.     if (e.getSource() == ticker) {
  26.       x = x + 2; y = y - 2;
  27.     }
  28. 	  }
  29. 	  if(x>=250&&x<350){
  30. 		  x = x + 2; y = y - 1;
  31. 	  }
  32. 	  if(x>=350&&x<450){
  33. 		    if (e.getSource() == ticker) {
  34. 		      x = x + 2; y = y + 1;
  35. 		    }
  36. 		}
  37. 	  if(x>=450){
  38. 		  if (e.getSource() == ticker) {
  39. 		      x = x + 2; y = y + 2;
  40. 		    }
  41. 	  }
  42.     if(e.getSource() == starter){
  43.       ticker.start();
  44.     }
  45.       repaint();
  46.     }
  47.   }
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https://ideone.com/z61FPN
language:
Java (HotSpot 12)
created:
11 years ago
visibility:
public

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