Java substring not working

Question

Forgive me, I'm new to Java and have an extremely basic question. I have a string and want a substring of it, for example:

String str = "hello";
str.substring(1);
System.out.println(str);

Instead of getting "ello" I get the original "hello", any idea why this is? Thanks.

Answer 1

Strings in Java are immutable. I believe you want to do this:

String str = "hello";
str = str.substring(1);
System.out.println(str);

Answer 2

Strings cannot be changed in Java, so you will need to re-assign the substring as such:

str = str.substring(1)

as opposed to calling the method by itself.