Thread: Scanner.useDelimiter("\n") Problem

Hey guys I am having some trouble when I use Scanner.UseDelimeter("\n") basically I have:

Scanner s = new Scanner(System.in);
          s.useDelimiter("\n");
 
          int amount;
 
          System.out.println("Enter the amount needed: ")
          amount = s.nextInt();

After I enter the integer for the amount, the program crashes. I use the delimiter for the scanner as I am using scanner.NextLine() later in the program.

Thanks

the program crashes.

Please copy and paste the full text of the error message here.

Exception in thread "main" java.util.InputMismatchException
at java.util.Scanner.throwFor(Unknown Source)
at java.util.Scanner.next(Unknown Source)
at java.util.Scanner.nextInt(Unknown Source)
at java.util.Scanner.nextInt(Unknown Source)
at DessertManager.main(DessertManager.java:39)

Line 39 is amount = s.nextInt();

java.util.InputMismatchException

This says that the input being read was not an integer.
What did you type into the console that caused this?

Just the number 1.

If I remove the s.useDelimiter("\n");

There is no problems, but I was told to use this to solve another problem, which is using nextLine() before a nextInt().

I guess using the \n changes the way Scanner works.
Here is what I tried and what I got:

       Scanner s = new Scanner(System.in);
       s.useDelimiter("\n");  //<<<<<<<<<<
       System.out.println("Enter the amount needed: ");
       System.out.println("hasNextInt=" + s.hasNextInt() + ", hasNext="  + s.hasNext());
       String line = s.nextLine();
       System.out.println("line=" + line + "<");
/*
      D:\JavaDevelopment\Testing\ForumQuestions6>java TestCode5
      Enter the amount needed:
      1 2 the end
      hasNextInt=false, hasNext=true
      line=1 2 the end<
*/

Yeah the \n changes it. I might just not use it, and use my other solution to the problem I was having. Appreciate your help anyway!