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I’m just curious.
suppose I define a reference inside a while/for loop.
does the JVM define this reference every iteration, or it’s optimized to define it only once?
It defines every time and scoped to only that loop iteration.
As soon as loop iteration done, it is eligible for GC.
As Louis Wasserman commented, The variable will be reinitialized every time, but the memory space will probably get reused.