Partially constructed objects in a thread-safe singleton

Question

In a multi-threaded environment, how can a stream see a “partially constructed object”? I realized that it is not thread safe, as multiple threads can create multiple instances.

class LazyInit
{  private static Resource resource = null;

    public static getInstance()
    {  if (resource == null) { resource = new Resource();  }
       return instance;
    }
}

Answer 1

Because of the record because of the order.

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