Query related to == in case of Wrapper classes

Question

I have been playing with == in wrapper classes. There's some weird thing that I encountered.

Integer i1 = 3;
Integer i2 = 3;

if(i1 != i2)
{
    System.out.println("i1 and i2 are not equal");     // if condition returns false in this case
}

which is working perfectly fine as far as my knowledge is concerned.

whereas, If I instantiate wrapper with

Integer i1 = 1000;
Integer i2 = 1000;


if(i1 != i2)
{
        System.out.println("i1 and i2 are not equal");    // if condition returns true in here
}

Then I am getting confused with the dual behavior of JVM with respect to the different values assigned to wrapper. Why is this happening so? Please share your thought on this.

Thanks

dup of http://stackoverflow.com/questions/4638023/strange-wrapper-classes-behavior-with-and?rq=1 — dkatzel, Jul 10 '14 at 19:57
I don't understand the question.`// if condition returns true in here` in particular, after `i1 != i2` — njzk2, Jul 10 '14 at 19:59

score 0 · Answer 1 · answered Jul 10 '14 at 19:58

0

You need to use !i1.equals(i2)

answered Jul 10 '14 at 19:58

ltalhouarne

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Good answer beside solution also *explains* problem. – Pshemo Jul 10 '14 at 20:02

Query related to == in case of Wrapper classes

1 Answers1