can´t compare String values correctly

Question

I´m having trouble with the while statement. I´ve narrowed it down to my use of the "!=", because if I try it with "==", then the program works, except opposite to how I want it to. What do I use to make it so that if the user types in "v", then it won´t display the user´s input, since there´s no such thing as "!==" :)

    Scanner scannerUi = new Scanner(System.in);
    String userInput = scannerUi.nextLine();
    while (userInput != "v") {
        System.out.println(userInput);
        userInput = scannerUi.nextLine();
    }

or towards left if your monitor is behind you and you are sitting with a mirror in front of you — devnull, Mar 15 '14 at 19:06
Maybe they aren't an [ambiturner](http://www.urbandictionary.com/define.php?term=ambi-turner). — Sotirios Delimanolis, Mar 15 '14 at 19:08

Sajad Karuthedath · Accepted Answer · 2014-03-15T19:14:29.560

0

use

while (!userInput.equals("v")) {
        System.out.println(userInput);
        userInput = scannerUi.nextLine();
    }

edited Mar 15 '14 at 19:14

answered Mar 15 '14 at 19:08

Sajad Karuthedath

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pushpendra chauhan · Answer 2 · 2014-03-15T19:15:28.397

0

you should always use equals() method for compairing the strings, because equals method examine the content and == method examine the references.

edited Mar 15 '14 at 19:15

answered Mar 15 '14 at 19:10

pushpendra chauhan

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i never said that string is a primitives – pushpendra chauhan Mar 15 '14 at 19:12
other primitives can be converted to object by using wrapper class – pushpendra chauhan Mar 15 '14 at 19:13
i guess now it is clear – pushpendra chauhan Mar 15 '14 at 19:15

score 0 · Answer 3 · answered Mar 15 '14 at 19:13

I think that u need to compare string not on reference equality as u do it but on value equality. So, if u want to compare your current string with some other (such as "v") just use:

userInput.equals("some_string")

Using "==" u will compare strings on reference equality, and using "equals()" u will compare strings on value equality

can´t compare String values correctly

3 Answers3