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Asked: 2026-06-10T12:45:00+00:00

Possible Duplicate: How to get adress of a Java Object? Memory address of variables

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Possible Duplicate:
How to get adress of a Java Object?
Memory address of variables in Java

Is there a way in Java to see or write the heap address of an object. Say I have a Long Object

Long mylong = Long.valueof(1);

I want to see the heap address of mylong instead of its value (1). I am just curious if it is possible! I know it is possible and may be it is not useful in the application. But I just looking for a way to know how the JVM is working in some cases.

If you a tool which do this like an eclipse plugin I will appreciate if you let me know about it!

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1 Answer

  1. Editorial Team

    Is there a way in Java to see or write the heap address of an object

    Short answer; no.

    Long answer is; you don’t want to as it’s not useful. You can use Unsafe to get this information but the reference can change at any time.

    Note: the reference is the address in 32-bit Java, but in 64-bit Java the reference is often multiplied by 8 and/or offset to allow the JVM to use 32-bit references for up to 32 GB of heap.

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