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Thread: Logical Flaw HELP!

  1. #1
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    Default Logical Flaw HELP!

    So I have a string Streams in a class
    and a method which requires user to enter either 1,2,3
    if they enter 1 Streams=Science, if they enter 2 Streams=2, If they enter 3 Stream= what ever the user inputs. The logic is fairly simple but I can't get it to work
    here is the code demo
    Scanner input = new Scanner(System.in);
    String Streams;
    public void InputStream() {
    	System.out.println("Enter the Stream.");
    	System.out.println("1 for Science, 2 for Arts, 3 for others");
    	int answer=input.nextInt();
    	if (answer==1) {
    	 Streams="Science";
    	}
    if(answer==2) {
    	 Streams="Arts";
    }
    else {
    	System.out.println("enter the subject");
    	input.reset();
    	Streams=input.nextLine();
    }
    }
    //i am gonna call the constructor "method"
    public method(){
    InputStream();
    System.out.println(Streams);
    also
    in output console the text from the 3rd if statement"enter the subject" appears every single time even when the user enters 1 or 2.
    A quick reply will be really appreciated
    }

  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Logical Flaw HELP!

    Can you copy the contents of the console from when you execute the program and paste it here to show the problem.
    Add some comments to describe the problem and show what the program should have done.
    For example
    1
    4 <<< This should be 2
    3
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: Logical Flaw HELP!

      String Streams="";  //=""
     
      public void InputStream() {
       ...
     
        if (answer==1) {
            Streams="Science";
        } else if(answer==2) {  //else
            Streams="Arts";
        } else {
          System.out.println("enter the subject");
          //input.reset();
          while(Streams.isBlank() ) {  //while
             Streams=input.nextLine();
          }
        }
    Last edited by zemiak; July 13th, 2019 at 11:13 AM.

  4. #4
    Super Moderator Norm's Avatar
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    Default Re: Logical Flaw HELP!

    @zemiak Please read: http://www.javaprogrammingforums.com...n-feeding.html
    If you don't understand my answer, don't ignore it, ask a question.

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