How do I turn an input String's characters to lowercase?

Question

I am trying to create the following program in which I need to turn the input String's characters into lowercase to ease my work.

I tried using toLowerCase(); first but it didn't work. Then I tried using toLowerCase(locale); and yet I have not succeeded.

public static void  Mensuration() {
    Locale locale = Locale.ENGLISH;
    Scanner inputz = new Scanner(System.in);
    System.out.println("Which kind of shape's formula would you like to find out.2D or 3D?");
    char dimension = inputz.nextLine().charAt(0);
    if(dimension == '2') {System.out.println("Okay so which shape?");
    String dimensiond = inputz.nextLine().toLowerCase(locale);
    if(dimensiond == "rectangle") {System.out.println("Area = length x breadth\nPerimeter = 2(length + breadth)");}
        }
        }

I expected the program to give the accurate output but the thing that happens is that there is no output actually!!

there is nothing wrong with how you put your input to lowerCase, just your comparison, as Guy points out. — Stultuske, May 07 '19 at 11:51

Ankit Deshpande · Accepted Answer · 2019-05-07T11:51:37.253

0

use equals to compare strings. I think this causing the error

"rectangle".equals(dimensiond)

edited May 07 '19 at 11:51

answered May 07 '19 at 11:51

Ankit Deshpande

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a better approach is to call the equals method on the String literal – Stultuske May 07 '19 at 11:51
why would that be a better approach? – Alan May 07 '19 at 11:52
@Alan https://stackoverflow.com/questions/20385179/calling-equals-on-string-literal – Guy May 07 '19 at 11:53
To prevent NPE @Alan `null.equals("")` vs `"".equals(null)`. – AxelH May 07 '19 at 11:53
there is also `equalsIgnoreCase` – Adriaan Koster May 07 '19 at 11:58

How do I turn an input String's characters to lowercase?

1 Answers1