Java: Why does if statement never resolve to true?

Question

I am trying to make a noughts-and-crosses prototype. The section of code I am struggling with is getting an user input, and if the input is y, it should change the gamestate to 0 which restarts the game. However this doesn't happen. Can anyone explain why?

Scanner s = new Scanner(System.in);
                System.out.println("Would you like to play again?");
                if (s.next().toLowerCase() == "y") {
                    System.out.println("Okay");
                    g.gamestate = 0;
                } else {
                    g.gamestate = 4;
                }

because you use `==` instead of equals. SO how to compare strings — XtremeBaumer, Dec 21 '16 at 11:59
Thank you, I've not been told about using equals instead of == before, I was also unaware that this was called "comparing strings". — Jade Rose, Dec 21 '16 at 12:10

score 1 · Answer 1 · answered Dec 21 '16 at 12:02

1

Try to use s.next().toLowerCase().equals("y") Operator "==" comparing the links on your string objects, and method "equals" comparing values.

answered Dec 21 '16 at 12:02

Ihor Dobrovolskyi

1,241
9
19

score 0 · Answer 2 · answered Dec 21 '16 at 12:03

0

Yes, as somebody commented the solution is need to use equals() instead of ==.

Scanner s = new Scanner(System.in);
  System.out.println("Would you like to play again?");
  if (s.next().equalsIgnoreCase("y")) {
      System.out.println("Okay");
      //g.gamestate = 0;
  } else {
      System.out.println("No");
     // g.gamestate = 4;
  }

answered Dec 21 '16 at 12:03

Kiran Kumar

1,033
7
20

1

as per OP, he needs y in lower case. So need of equalsIgnoreCase, only equals is needed – Chinmay Dec 21 '16 at 12:05
Yes, you are right! – Kiran Kumar Dec 21 '16 at 12:07

Java: Why does if statement never resolve to true?

2 Answers2