class Reserve extends Thread{
     int available=1;
     int wanted; 
    Reserve(int i){ 
        wanted = i;
        }
        public  void run(){
            System.out.println("available berths = "+ available);
            if(available>=wanted){
                String name=Thread.currentThread().getName();
                System.out.println(wanted+"berths reserved for "+name); 
                try{
                    Thread.sleep(1500);
                    available = available - wanted;
                    } 
                    catch(InterruptedException ie){}
                    }
                    else System.out.println("sorry, no berths");
                    } 
                    }
                    class Train{ 
                        public static void main(String ar[]){

Reserve re = new Reserve(1);
Thread t=new Thread(re);

Thread t1= new Thread(re);
t.setName("first person");
t1.setName("second person");
t.start();
t1.start(); 
}
}