기본 메서드의 스레드에서 계산된 값을 어떻게 검색할 수 있나요?

<code class="java">public class Foo implements Runnable {
    private volatile int value;

    @Override
    public void run() {
        value = 2; // Compute the value in the thread
    }

    public int getValue() {
        return value;
    }
}</code>

<code class="java">Foo foo = new Foo();
Thread thread = new Thread(foo);
thread.start();
thread.join();
int value = foo.getValue(); // Retrieve the value computed in the thread</code>