[java-dev] memory running wild

Hello,


Check these two links:
http://java.sun.com/docs/books/jls/second_edition/html/typesValues.doc.html#18470
http://www.yoda.arachsys.com/java/passing.html

In Java, a variable is something like pointers in C (except for 
primitive types). This means, that you'll never get "deep copies" of 
objects passed through the argument list of a function (except for 
primitive types). If you have a primitive type (int, float, boolean 
etc), you get it passed "by value", and if you have any other object, 
you get the variable (that is, the pointer to the object) passed "by 
value", not a copy of the object itself. (If you have a String, or any 
other immutable object, you'll get a variable that points to the same 
location in the internal string table of Java than the original string 
variable).

Hope this helps,
Adam


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jbmaxwell wrote:
> I seem to have created a memory leak of some kind.
>
> I have an object, say "Link", that makes associations between two instances of another type of objects, say "Thing". Basically, I'm testing for similarity between Things, and using Links to record the similarities found. 
>
> The Link has a constructor which takes two Things, and some analysis data indicating the ways in which they are similar. What I'm curious about is whether such a constructor would make deep copies of the two Thing objects, or just store references? The way my memory usage is spinning out of control, I'm guessing that actual copies are being made. Is there any way to check this? Is there any way to avoid this?
>
> Thanks for any thoughts.
>
> J.
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