How string concat method works

Question

I know String in Java is immutable. Consider:

String s = "Java";
s = s.concat(" is simple");
System.out.println(s); //prints Java is simple

Here the value of String s is changed? Can someone explain me, how String concat actually works?

Don't confuse variables, reference values, and objects. This has nothing to do with immutability. — Sotirios Delimanolis, Sep 10 '16 at 15:35

score 0 · Answer 1 · edited Sep 10 '16 at 16:59

0

s.concat(" is simple") returns a new string and s = s.concat(" is simple") assigns this new string to variable s.

edited Sep 10 '16 at 16:59

reformed

answered Sep 10 '16 at 15:40

akm.rocks

1 Answers1