Interview Question

Counter.java

package com.pivincii;

public class Counter {
    private int count = 0;

    public void increment() {
        count ++;
    }

    public void decrement() {
        count --;
    }

    public int getCount() {
        return count;
    }

    public static void main(String[] args) {
        Counter counter = new Counter();
        Thread t1 = new Thread(new Runnable() {
            @Override
            public void run() {
                counter.increment();
            }
        });
        Thread t2 = new Thread(new Runnable() {
            @Override
            public void run() {
                counter.decrement();
            }
        });

        t1.start();
        t2.start();
        System.out.println(counter.getCount());
    }
}