Re: Strange OutOfMemory Exception

Lew <>
Thu, 12 Apr 2007 10:02:08 -0400
<> wrote:


The following code produces an "OutOfMemoryError: Java heap space"-

class test{
public static void main(String[] args)
boolean[][][] Matrix=new boolean[31125][1632][2];

Variable names should start with a lower-case letter.


This array should have a size of about 12Mb. I even get the error when

My rough calculations indicate that that array would occupy about 100 MB,
assuming a boolean occupies one byte.

31125 * 1632 * 2 == 101592000

Of course, it's possible that a boolean occupies an entire int, which would
make that array occupy about 400 MB.

 From <>:

When a compiler translates Java source code into bytecodes, it uses ints or bytes to represent booleans. wrote:

i start it with
"-Xmx30M". With "-Xmx400M" it takes quite a while and steadily fills
up my complete memory.

Is there any other code in your program? Could it use memory? Perhaps the
other code is using more memory than even the 100 MB or 400 MB boolean array.


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