Equality operator on inputted strings returning unexpected value in java

Here is a general form of part of my code, it asks the user for an input read by in.next(); which then is used in an if statement: if (input == "one") { do whatever }, however when i type in one, the if statement is skipped despite, what seems to me like a valid comparision, what am i doing wrong?

Scanner in = new Scanner(System.in);

String input = in.next();
                if (input == "one") {
                }

user inputs one.