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how to find the memory a String would occupy
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Chandhrasekar Saravanan
Ranch Hand
Joined: Jun 16, 2002
Posts: 57
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Hi ,
I would like to check the memory the string occupies using java.
is there also an way, i could find the memory a file would occupy
Thanks
Chandhrasekar Saravanan
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Cindy Glass
"The Hood"
Sheriff
Joined: Sep 29, 2000
Posts: 8521
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Well the String itself is implemented at a char array, so just count the chars.
Then there is a little overhead elsewhere to track it's location.
A file could be more complex. You could just read it out byte by byte and find out.
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"JavaRanch, where the deer and the Certified play" - David O'Meara
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Chandhrasekar Saravanan
Ranch Hand
Joined: Jun 16, 2002
Posts: 57
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hi cindy,
I really couldnt get your answer. i am able to count the charecters of the string. but i couldnt find any method to find the memeory it would occupy.
please help me with a little more detailed answer
Thanks
Chandhrasekar Saravanan
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Michael Morris
Ranch Hand
Joined: Jan 30, 2002
Posts: 3451
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I really couldnt get your answer. i am able to count the charecters of the string. but i couldnt find any method to find the memeory it would occupy.
Do you mean the physical address of the String object in memory?
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Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius - and a lot of courage - to move in the opposite direction. - Ernst F. Schumacher
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Layne Lund
Ranch Hand
Joined: Dec 06, 2001
Posts: 3061
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If you are referring to the AMOUNT of memory, rather than the LOCATION in memory, each char is 2 bytes long in Java. So if a String has 10 characters, it occupies 20 bytes, plus whatever overhead is needed for the String class itself.
HTH
Layne
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Java API Documentation
The Java Tutorial
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Ahetuki Neti
Greenhorn
Joined: May 29, 2003
Posts: 20
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Use getBytes() on the string object and find the length of the byte array.
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Ahetuki, the Constant.
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subject: how to find the memory a String would occupy
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