MyMutableObject.java

public class MyMutableObject
{
    private int value;

    public MyMutableObject(int value)
    {
        this.value = value;
    }

    public synchronized int getValue()
    {
        return value;
    }

    public static MyMutableObject object;
    public static void main(String[] args)
    {
        for (int i = 0; i < 1000; i++) {
            new Thread(new Runnable() {
                @Override
                public void run()
                {
                    while (true) {
                        MyMutableObject instance = object;
                        if (instance != null && instance.getValue() == 0) {
                            System.out.println("The impossible happened");
                        }
                        try {
                            Thread.sleep(10);
                        }
                        catch (InterruptedException e) {
                            Thread.currentThread().interrupt();
                            return;
                        }
                    }
                }
            }).start();
        }
        object = new MyMutableObject(42);
    }
}