break program when user enters specific string into input

Question

I want to make it so that the user inputs some string, and the program takes console input until user types "/done".. so here's how it would work:

print to user: enter your string
user enters: hello eclipse.

hi test blah blah

bla 456 testmore /done

As soon as user enters /done within any string of any size, the program breaks. The program would NOT end if you hit "enter" key. It would only end if you type in /done.. How I setup my program so far:

Scanner 123 = new Scanner(System.in);
string input = "";
System.out.println("Enter your string: ");

do {
    input = 123.nextLine();
    System.out.print("Rest of program here..");
}

while (!input.equals("/done"));

I tried putting under while loop there something like below but I don't think I am doing it right.

while (!input.equals("/done"));
    if input.equals("/done");
    break;
}

I understand that with a do-while loop, it continues as long as boolean in while is false. So for my program, program takes inputs until user types in /done so boolean is false until string /done in inputted. Then according to the logic above, the program breaks as soon as input equals "/done"

Any ideas on what I'm doing wrong?

Sounds like you want to check whether input contains "/done" rather than input equals "/done". — John3136
– John3136, Commented Apr 2, 2013 at 0:47
whether the use types /done or is it part of a larger string — Arun P Johny
– Arun P Johny, Commented Apr 2, 2013 at 0:49
John - yes, you're right, contains would work rather than equals. Would you put that within the while of the do-while loop?? .. Arun - user would have to input /done all at once within the string input. Not on it's own line - it could be on it's own line but it is not necessary. Just has to be "/done" together — sega_one
– sega_one, Commented Apr 2, 2013 at 0:55
Even if you call contains it means your program won't break until the user hits the enter key. So I could type "blah blah /done blah blah<enter>" Is that what you want? — Catchwa
– Catchwa, Commented Apr 2, 2013 at 1:36

Kick Buttowski · Accepted Answer · 2014-12-11 23:53:42Z

0

         Scanner s=new Scanner(System.in);
         String input = "";
         String[] parts;
         System.out.println("Enter your string: ");
         while (true){
             input=s.nextLine();
            if (input.contains("/done")){
            parts=input.split("/done");
            //Use parts[0] to do any processing you want with the part of the string entered before /done in that line
                break;
            }
        }

edited Dec 11, 2014 at 23:53

Kick Buttowski

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answered Apr 3, 2013 at 11:56

Avik

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Comments

Harshit Gupta · Accepted Answer · 2015-06-29 05:40:57Z

0

I think this will work fine

Scanner scanner = new Scanner(System.in);
    String input = "";
    System.out.println("Enter your string: ");
        do {
        input = scanner.nextLine();
    } while (!input.contains("/done"));
    System.out.print("Rest of program here..");

answered Jun 29, 2015 at 5:40

Harshit Gupta

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Comments

Reilas · Accepted Answer · 2023-12-08 18:23:38Z

0

You almost had it, instead of equals, use contains.

Scanner scanner = new Scanner(System.in);
String input = "";
System.out.println("Enter your string: ");

do {
    input = scanner.nextLine();
    System.out.print("Rest of program here..");
}

while (!input.contains("/done"));

edited Dec 8, 2023 at 18:23

answered May 22, 2023 at 22:32

Reilas

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