Comparation doesnt work for certain values

Asked Dec 23 '20 at 13:20

Active Dec 23 '20 at 13:24

Viewed 31 times

Why does the code below:

List<Integer> elts = new ArrayList<Integer>();
elts.add(129);
elts.add(129);
System.out.println(elts.get(0) == elts.get(1));

returns (prints) false?

but it works for some other values (i.e if i replace 129 by 100/120/..etc). In fa

edited Dec 23 '20 at 13:24

asked Dec 23 '20 at 13:20

Ryan Tee

nothing wrong, what do you expet? – Alex Rmcf Dec 23 '20 at 13:23
its a typo it was supposed to be == not !=, i changed it. It prints false even though 129==129?? – Ryan Tee Dec 23 '20 at 13:25
2

Use `.equals` to compare objects (which Integers are). It works with `==` up to 128 due to the Integer cache – Aaron Dec 23 '20 at 13:27
I see, thanks alot! – Ryan Tee Dec 23 '20 at 13:30

0 Answers0