Java. First loop doesnt work

Question

i got a little problem with my code. When i write "exit" still shows statement "Unknown command" and i want to show "Bye". Can you help me?

import java.util.Scanner;

public class Hello{
    public static void main(String[] args){
        Scanner odczyt = new Scanner(System.in);
        String word;

        do{
            word = odczyt.nextLine();
            System.out.println("Unknown command");
        }
        while(word!="exit");
            System.out.println("Bye");
    }
}

score 0 · Answer 1 · answered Aug 09 '16 at 12:43

0

"Unknown command" will always be printed. Besides that you shouldn't use = to compare Strings. You should use .equals() or .equalsIgnoreCase().

answered Aug 09 '16 at 12:43

brso05

13,142
2
21
40

I change while to `while("exit".equalsIgnoreCase(word))` now only when i write "exit" shows "Unknown commend" – Ernest Aug 09 '16 at 12:57
You want `while(!"exit".equalsIgnoreCase(word))` don't forget the negation `!`... – brso05 Aug 09 '16 at 13:00
Thanks a lot @brso05! ;) It works :) – Ernest Aug 09 '16 at 13:02
@Ernest You're welcome! – brso05 Aug 09 '16 at 13:03

Java. First loop doesnt work

1 Answers1