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Reference nulling to "help the garbage collector" is unnecessary. It adds clutter to the code and can introduce subtle bugs. Assigning null
to local variables is also unnecessary; the Java Just-In-Time compiler (JIT) can perform an equivalent liveness analysis — most implementations do this. A related bad practice is use of a finalizer to null
out references; see OBJ08MET18-J. Avoid using finalizers for additional details.
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