is there hash code / Heap address for primitive types in Java? -

i trying find approximization address on heap , , guys gave me function system.identityhashcode(object).

the problem - function doesn't fit primitive types. i'll explain why.

i'm given input java compiled program - class file. goal plot graphs contain information variable access between time. have no idea of how code looks in advance , , tactic instrumentation of own bytecode every load , store instruction. i'm using asm java bytecode instrumentation.

therefore, can't like:

identityhashcode(integer.valueof(...)) 

because have no indication whether type int, double, long, etc.

i want able determine between different instances of same class:

for example :

class foo { int a; } foo b; foo c; b.a++; c.a++; 

but when comes bytecode , there no relation between name "b" / "c" , attribute a. "see" is incremented. both regarded ! if object a have used system.identityhashcode() distinguish between them. can't.

to make myself clear, @ following example:

package manipulate;  public class test {         int c;         public static void main(string[] args) {             test a=new test();             test b=new test();             a.c++;             b.c++;         }     } 

which translated (main function) following bytecode:

   l0     linenumber 7 l0     new manipulate/test     dup     invokespecial manipulate/test.<init>()v     astore 1    l1     linenumber 8 l1     new manipulate/test     dup     invokespecial manipulate/test.<init>()v     astore 2    l2     linenumber 9 l2     aload 1     dup     getfield manipulate/test.c :     iconst_1     iadd     putfield manipulate/test.c :    l3     linenumber 10 l3     aload 2     dup     getfield manipulate/test.c :     iconst_1     iadd     putfield manipulate/test.c :    l4     linenumber 11 l4     return 

and can see, i've got on stack value of integer c. therefore, given code, can't determine between these 2 c's!

what i've got java bytecode . dont have b or c , i'm not aware of them . have value of on stack

if have local variables on stack, have variable numbers. these numbers local stack frame, in method executing, , 2 variables same if have same number.

if have 2 primitive values in evaluation (argument/operand/result) stack, same (in similar sense variables) if exist @ same time @ same stack index.

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in example, see 2 getfield manipulate/test.c : i instructions operate each on current value on stack (which put there aload 1 or aload 2). current value object variable belongs, insert there counting code object (do dup first).