java - How many objects are created by using the Integer wrapper class? -

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integer = 3;  = + 1;  integer j = i;  j = + j;

how many objects created result of statements in sample code above , why? there ide in can see how many objects created (maybe in debug mode)?

the answer, surprisingly, zero.

all integers -128 +127 pre-computed jvm.

your code creates references these existing objects.


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