[java]écrire prg main

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.GridLayout;
//import java.awt.BorderLayout;
import javax.swing.JButton; 
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Fenetre extends JFrame
{
   private Panneau pan=new Panneau();	
   private JButton bouton=new JButton("mon bouton");
   private JPanel container=new JPanel();
 
   public Fenetre()
   {
      this.setTitle("Animation");
      this.setSize(300,300);
      this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      this.setLocationRelativeTo(null);
      container.setBackground(Color.white);
      container.setLayout(new BorderLayout());
      container.add(pan,BorderLayout.CENTER);
      container.add(bouton,BorderLayout.SOUTH);
      this.setContentPane(container);
      this.setVisible(true);
      go ( ); 
   }
     private void go ( )
	     {	       
	         int x=pan.getPosX(),y=pan.getPosY();	     
	         boolean backX=false;	     
	         boolean backY=false;	      
	          while(true)
	          {	              
		   if(x<1)backX=false;		
		    if(x>pan.getWidth()-50)backX=true;		
		    if(y<1)backY=false;
		      if(y>pan.getHeight()-50)backY=true;		        		   		
		   if(!backX)
		          pan.setPosX(++x);		
		   else
		          pan.setPosX(--x);		        		   		
		   if(!backY)
		         pan.setPosY(++y);	               
		   else		             pan.setPosY(--y);		        		   	              		        pan.repaint();		        		              		        	           
		  try
		    {
		         Thread.sleep(3);
		    }
		    catch(InterruptedException e)
		    {
		         e.printStackTrace();
		    }
	          }
	     }
}
 
import java.awt.BasicStroke;
	import java.awt.Color;
	import java.awt.Graphics;
	import javax.swing.JFrame;
	import javax.swing.JPanel;
public class Panneau extends JPanel
{
	   private int posX=-50;
	   private int posY=-50;
 
	   public void paintComponent (Graphics g)
	   { 	      
	     g.setColor (Color.white);		  
	     g.fillRect (0,0,this.getWidth ( ),this.getHeight ());			     
	     g.setColor (Color.red);		
	     g.fillOval (posX,posY,50,50);
	  }
 
	    public int getPosX( )
	    {
	      return posX;
	    }
	    public void setPosX (int posX)
	   {
	     this.posX=posX;
	   }
	   public int getPosY ( )
	   {
	     return posY;
	   }
	   public void setPosY (int posY)
	   {
	     this.posY=posY;
	   }
	}
 
import javax.swing.JFrame;
import javax.swing.JButton;
import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
public class Bouton extends JButton 
{
  private String name;
  private Bouton(String str)
  {
	  super(str);
	  this.name=str;
  }
  public void paintComponent(Graphics g)
  {
	  Graphics2D g2d=(Graphics2D)g;
	  GradientPaint gp=new GradientPaint(0,0,Color.blue,0,20,Color.cyan,true);
	  g2d.setPaint(gp);
	  g2d.fillRect(0,0,this.getWidth(),this.getHeight());
 
	  g2d.setColor(Color.white);
	  g2d.drawString(this.name, this.getWidth()/2-(this.getWidth()/2/4),(this.getHeight()/2)+5);
  }
 
public static void main(String[]args)
{
  JFrame frame=new JFrame();
  frame.getContentPane().add(new Bouton("Mon Bouton"));
  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  frame.setSize(200,200);
  frame.setVisible(true);
}
}