Slip 5 - B) Write a java program in multithreading using applet for Traffic signal.

Solution:

import java.applet.*;

import java.awt.*;

public class Slip333 extends Applet implements Runnable

{

static int x;

public void init()

{

Thread tx=new Thread(this);

tx.start();

}

public void run()

{

repaint();

}

public void paint(Graphics g)

{

g.drawRect(100,100,200,400);

g.drawOval(120,120,100,100);//red

g.drawOval(120,240,100,100);//yellow

g.drawOval(120,360,100,100);//green

if(x==0)

{

g.setColor(Color.red);

g.fillOval(120,120,100,100);

x=1;

}

else if(x==1)

{

g.setColor(Color.yellow);

g.fillOval(120,240,100,100);

x=2;

}

else if(x==2)

{

g.setColor(Color.green);

g.fillOval(120,360,100,100);

x=0;

}

try{

if(x==1){Thread.sleep(5000);}

else if(x==2){Thread.sleep(1000);}

else if(x==0){Thread.sleep(5000);}

}

catch(Exception e){}

repaint();

}

}