AtomicVariable.java

package com.interview.basics.java.cocurrency;

import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * Created with IntelliJ IDEA.
 * User: stefanie
 * Date: 12/24/14
 * Time: 2:08 PM
 */
public class AtomicVariable implements Runnable {
    private AtomicInteger i = new AtomicInteger(0);

    public int getValue() {
        return i.get();
    }

    public void evenIncrement() {
        i.addAndGet(2);
    }

    @Override
    public void run() {
        while (true) {
            evenIncrement();
        }
    }

    public static void main(String[] args) {
        new Timer().schedule(new TimerTask() {
            @Override
            public void run() {
                System.err.print("Aborting");
                System.exit(0);
            }
        }, 5000);
        ExecutorService exec = Executors.newCachedThreadPool();
        AtomicVariable sample = new AtomicVariable();
        exec.execute(sample);
        while (true) {
            int val = sample.getValue();
            if (val % 2 != 0) {
                System.out.println(val);
                System.exit(0);
            }
        }
    }
}