Java Thread example two

public class First {

public static void main(String[] args) {
// TODO Auto-generated method stub
Second sec = new Second(1);
Thread t = new Thread(sec);
Thread t1 = new Thread(sec);
t.start();
t1.start();
}

}

public class Second extends Thread{

int avail=1;

int req;

Second(int i){

this.req=i;

}

public void run(){

synchronized(this){

if((avail>0)&&(req==1)){

System.out.println("Allocating the seat");

avail=req-1;

try {

sleep(1000);

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

else{

System.out.println("No Seats");

}

}

}

}

output:-

Allocating the seat

No Seats