I want to know Size of operator in java like cpp

[Srinu]

how do we know how much mewmory allocated to class

 

[Manish Pandit]

http://martin.nobilitas.com/java/sizeof.html

http://www.glenmccl.com/tip_038.htm

Hope this helps.

-cheers,
Manish

 

[Hendrik Maryns]

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Srinu schreef:

how do we know how much mewmory allocated to class

Google is you friend.
H.
- --
Hendrik Maryns
http://tcl.sfs.uni-tuebingen.de/~hendrik/
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[Mark Jeffcoat]

how do we know how much mewmory allocated to class

Java doesn't need a sizeof operator, because it doesn't
have C's platform-dependence in the size of various
types.

Don't try to roll your own profiler. There are plenty
of good ones available, even for free; I'm using JRat
(jrat.sourceforge.net) myself.

 

[maas]

and you just can't rely on the results you get using any 'indirect
approach' (as the freeMemory one, posted above)... the underlying
implementation can change even among different JRE/SDK versions...

but there are some 'rules of the thumb' for using memory wisely:

.. byte, short and int are at most as big as an 'int', and a int
occupies at least 4 bytes
.. a char occupies at least two bytes
.. an object is as big as the sum of its componets
.. an array is an object too

and etc.

but there's no way to precisely define the space used by your data
structures, you can not get to know the size of the data structures
maintained by the garbage collector and by the virtual machine...

maas

-
http://www.marcosaurelio.com

 

[marco.rosi]

Srinu ha scritto:

how do we know how much mewmory allocated to class

try this: http://sourceforge.net/projects/sizeof/
it's based on the "new" java.lang.Instrumentation package
bye