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interthreadcommunication1.java

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class ThreadB extends Thread //this thread performing updation so called notify method

{

int tot=0;

public void run()

{

synchronized(this)

{

/*2*/System.out.println("child thread start calculation");

for (int i = 1; i <= 100; i++) {

tot += i;

}

/*3*/System.out.println("Child thread trying to give notification");

/*4*/this.notify();//notify method

}

}

}

//Run this code and see o/p and also analyse

//most of time main thread get chance according to that flow indicated by numbers

class interthreadcommunication1 //this thred expecting updation so called wait method

{

public static void main(String[] args) throws InterruptedException

{

ThreadB b=new ThreadB();

b.start();

//most of time main thread got a chance

synchronized(b)

{

/*1*/System.out.println("main thread trying to call wait method");

b.wait();//after calling this main thread go into waiting state

//as wait method is called by main thread so immediately releases lock and it goes into waiting state

/*5*/System.out.println("main thread got notificaion ");

/*6*/System.out.println(b.tot);

}

}

}