Sticky Oval in JAVA

import java.awt.*;
import java.awt.event.*;
import java.applet.*;

public class sticky_oval extends Applet implements MouseMotionListener {
 int x,y;
 public void init() {
  addMouseMotionListener(this);
 }
 public void mouseMoved(MouseEvent me) {
  x=me.getX();
  y=me.getY();
  repaint();
 }
 public void mouseDragged(MouseEvent me) {
 
 }
 public void paint(Graphics g) {
  try {
   g.drawOval(x,y,x,y);
   if(x==y) {
    g.setColor(Color.blue);
    g.fillOval(x,y,x,y);
    showStatus("THIS IS PERFECT CIRCLE.");
    Thread.sleep(4000);
   } else showStatus("");
  } catch(InterruptedException e) {
  
  }
 }
} 

Moving Circle in JAVA

An applet program to move circle in JAVA

import java.applet.*;
import java.awt.*;

/*
  <applet code="moving_circle" width=300 height=100>
  </applet>
*/

public class moving_circle extends Applet implements Runnable
{
    int x=0;
    Thread t;
    Image buffer;
    Graphics bufferg;

    public void init()
    {
        t=new Thread(this);
        t.start();
        Dimension d=getSize();
        buffer=createImage(d.width,d.height);
    }
    public void run()
    {
        try
        {
            while(true)
            {
               repaint();
               Thread.sleep(500);
            }
        }
        catch(Exception e)
        {
        }
    }

    public void update(Graphics g)
    {
        paint(g);
    }

    public void paint(Graphics g)
    {
        if(bufferg==null)
            bufferg=buffer.getGraphics();

        Dimension d=getSize();
        bufferg.setColor(Color.black);
        bufferg.fillRect(0,0,d.width,d.height);
        bufferg.setColor(Color.white);
        bufferg.fillOval(x,d.height/4,50,50);

        g.drawImage(buffer,0,0,this);
        x+=5;
        if(x+50>d.width)
            x=0;
    }
}