Is the weakReference.get() method safe to call from multiple threads at the same time?

Question

Is the weakReference.get() method safe to call from multiple threads at the same time?

The documentation says that

Once an object has been determined to be garbage collectable at that time it will atomically clear all weak references to that object

Answer 1

WeakReference.get() when updated by the GC or it couldn't be updated by the GC thread. Otherwise, there would be a risk you could see an object which has previously been collected.

Note: As @Pillar may be suggesting, there is one operation which is not thread safe clear(), it is possible another thread might still get() the value after this is called.