Java random applet

Draw Dots at Random Locations in an Applet

import java.applet.Applet;

import java.awt.Dimension;

import java.awt.Graphics;

public class DrawDotsAtRandomLocationsExample extends Applet implements Runnable

{    

Thread t;

public void init()

{

t = new Thread(this);

t.start();

}       

public void run()

{

try

{                    

while(true)

{

repaint();

Thread.sleep(200);

}

}

catch(Exception e)

{

   }             

}

public void update(Graphics g)

{

paint(g);

}

public void paint(Graphics g)

{       

Dimension d = getSize();

int x = (int)(Math.random() * d.width);

int y = (int)(Math.random() * d.height);

g.fillRect(x,y,2,2); 

   }

}

Draw Line in Applet Window

import java.applet.Applet;

import java.awt.Graphics;

public class DrawLineExample extends Applet

{

public void paint(Graphics g)

{

g.drawLine(10,10,50,50);

g.drawLine(10,50,10,100);         

g.drawLine(10,10,50,10);

   }

}

Draw Oval & Circle in Applet Window

import java.applet.Applet;

import java.awt.Color;

import java.awt.Graphics;

public class DrawOvalsExample extends Applet

{

public void paint(Graphics g)

{             

setForeground(Color.red);       

g.drawOval(10,10,50,100);

g.fillOval(100,20,50,100);

             }

}

Draw Rectangle & Square in Applet Window

import java.applet.Applet;

import java.awt.Graphics; 

public class DrawRectanglesExample extends Applet

{

public void paint(Graphics g)

{

g.drawRect(10,10,50,100);

g.drawRect(100,100,50,50);

   }

}

Draw Rounded Corner Rectangle & Square in Applet

import java.applet.Applet;

import java.awt.Color;

import java.awt.Graphics;

public class DrawRoundedRectExample extends Applet

{

public void paint(Graphics g)

{

setForeground(Color.red);

g.drawRoundRect(10,10,50,100,10,10);

g.drawRoundRect(100,100,50,50,10,10);

g.fillRoundRect(200,20,50,100,10,10);

g.fillRoundRect(200,200,50,50,10,10);

   }

}

Draw Smiley In Applet

import java.awt.*;

import java.applet.*;

public class Smiley extends Applet

{

public void paint(Graphics g)

{

Font f = new Font("Helvetica", Font.Bold,20);

g.setFont(f);

g.drawString("Keep Smiling!!!", 50, 30);

g.drawOval(60, 60, 200, 200);

g.fillOval(90, 120, 50, 20);

g.fillOval(190, 120, 50, 20);

g.drawLine(165, 125, 165, 175);

g.drawArc(110, 130, 95, 95, 0, -180);

   }

}

Fill Rectangle & Square in Applet Window 

import java.applet.Applet;

import java.awt.Color;

import java.awt.Graphics;

public class FilledRectangleExample extends Applet

{

public void paint(Graphics g)

{

setForeground(Color.red);

g.fillRect(10,10,50,100);

g.fillRect(100,100,50,50);

   }

}