Why does String.replace not work? [duplicate]

Question

I am a little bit confused at the moment. I tried that:

String test = "KP 175.105"; test.replace("KP", ""); System.out.println(test); 

and got:

KP 175.105 

However, I want:

175.105 

What's wrong with my code?

Answer 1

You did not assign it to test. Strings are immutable.

test = test.replace("KP", ""); 

You need to assign it back to test.