Opposite Thread in Java

Question

I want to make Opposite Thread in java.

If Thread A is running, then Thread B is waiting. The other way, Thread B is running, then Thread A is waiting.

A : -----　　　　　　　------------------　　　　　-----------

B : 　　　------------　　　　　　　　　　--------

I want to write code with wait(), notify function(not suspend(), resume) But it is very difficult for me.

Help me

ok.. where are you stucked? What do you think is difficult? Did you tried solving? — SMA, Mar 10 '15 at 07:09
possible duplicate of [Printing Even and Odd using two Threads in Java](http://stackoverflow.com/questions/16689449/printing-even-and-odd-using-two-threads-in-java) — Kedar Parikh, Mar 10 '15 at 07:12
Documentation is your friend - start with the [Java Concurrency Tutorial](http://docs.oracle.com/javase/tutorial/essential/concurrency/), and try experiments with some code. It'll work a lot better than us trying to explain these concepts to you in a very broad question like this. Come back if you have a specific question based on what you learn. — Krease, Mar 10 '15 at 07:15

score 0 · Answer 1 · answered Mar 10 '15 at 08:14

You need to synchronize on two variables.

public class T1 implements Runnable {
    public static final Object LOCK = new Object();  

    public void run() {
        try {
            while (true) {
                // Your code here
                T2.LOCK.notify();
                T1.LOCK.wait();
            }
        } catch (Exception e) {
            // Handle exception
        }
    }
}

public class T2 implements Runnable {
    public static final Object LOCK = new Object();

    public void run() {
        try {
            T2.LOCK.wait();
            while (true) {
            // Your code here
                T1.LOCK.notify();
                T2.LOCK.wait();
            }
        } catch (Exception e) {
            // Handle exception
        }
    }
}

Opposite Thread in Java

1 Answers1