双对象内存泄漏？

Question

here's the setup for c# program:

Inside Main class: ObjA MyObjA = new ObjA();

Inside ObjA: ObjB MyObjB = new ObjB();

So main has a reference to ObjA, and ObjA has a reference to ObjB.

Now let's say in the main class, i set MyObjA = null; Will the garbage collector come along and destroy ObjA? Or will it save it since it has a reference to ObjB (which is not destroyed yet)?

You can see how this would be a huge memory leak in the latter case. But as a side note, if the former case is true, then would it take 1 pass or 2 passes of the GC before ObjB is destroyed?

Also, could someone tell me what would happen in Android Java too? Those are the two languages I'm working with atm.

Answer 1

Both MyObjA and MyObjB will be destroyed since they're unreachable from any GC roots (things like static variables, stack variables, or things that are recursively pointed to by things like this).

I'm not exactly sure what you mean by two passes. The details of the Java garbage collector are somewhat complicated but, if the objects are unreachable they should be cleaned up in a single GC cycle.