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interthreadcommunication3.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) {

/* 1 */System.out.println("child thread start calculation");

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

tot += i;

}

/* 2 */System.out.println("Child thread trying to give notification");

/* 3 */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 interthreadcommunication3 // this thred expecting updation so called wait method

{

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

ThreadB b = new ThreadB();

b.start();

Thread.sleep(10000);

synchronized (b) {

/* 4 */System.out.println("main thread trying to call wait method");

//Problem in interthreadcommunication2.java solved in just below statement

b.wait(10000);//main therad wait only for 10 sec if not notificaion came then rest of code is executes

// after calling this main thread go into waiting state

//here thread does not get noification only executed rest of part present below

/*5*/System.out.println(b.tot);

}

}

}