String and while loop

Hey guys, this is my first time posting, registered 5 mins ago.

I am trying to make a program which allows the user to input letters, from A to F. when the user enters an empty sentence, the program is to print statistics to each letter. i.e:

Enter letters: ABAB
Enter letters: CBBBC
Enter letters: DEDF
Enter letters: AA
Enter letters:

Statistics:
A: 4
B: 5
C: 2
D: 2
E: 1
F: 1


my program looks like this, so far;
import java.util.Scanner;

Code:

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public class Karakterstatistikk {
 
  public static void main(String args[]) {
   
    String karakterer = "";
   
    int primitiv = Integer.parseInt(karakterer);
   
    Scanner tastatur = new Scanner(System.in);
   

      System.out.println("Karakterstatistikk.");
      System.out.println("Innlesing avsluttes med tom linje.");
      System.out.print("Angi karakterer for student:");
      karakterer += tastatur.next();
      System.out.println();
   
     
      while (user.input > 0 ) {
        System.out.print("Angi karakterer for student:");
        karakterer += tastatur.next();
        System.out.println();
        System.out.println(karakterer);
        System.out.println(primitiv);

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It's the while loop which gives me problems. I need the right condition. I want the while loop to run, as long as the string expands. if the user enters an empty sentence, the program should exit the while loop and print the statistics. Any thoughts about what condition I should set in the while loop?

I am from norway btw, therefore I have a lot of the program written in norwegian.

Thanks.

Write your code in English. It's the defacto language for programming. You will also get more help that way.
What is the behaviour of your code now?
What should happen if I put a character that is neither blank nor A-F?

Hey, thanks for the reply, I'll post it in English next time ;)

Here is the solved puzzle;

Code:

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/* Muliggjør bruk av tastatur */
import java.util.Scanner;

/* Navn på programmet */
public class Karakterstatistikk {
 
  /* Main metoden */
  public static void main(String args[]) {
   
    /* Programmets variabler */
    String karakterer = "";
    char tegn;
    int a = 0;
    int b = 0;
    int c = 0;
    int d = 0;
    int e = 0;
    int f = 0;
   
    /* Aktiverer tastaturet og ber brukeren taste inn de første karakterene, som senere aktiverer While løkken */
    Scanner tastatur = new Scanner(System.in);
    System.out.println("Karakterstatistikk.");
    System.out.println("Innlesing avsluttes med tom linje.");
    System.out.print("Angi karakterer for student (store bokstaver):");
   
    /* Ber brukeren om å taste inn karakterer, helt til brukeren taster inn en tom setning */
    while (tastatur.hasNextLine()) {
      String karakterlinje = tastatur.nextLine();
      karakterer += karakterlinje;
     
      /* Når brukeren taster inn en tom setning aktiveres denne if-setningen, og break; komanndoen avslutter while løkken */
      if (karakterlinje.equals("")) {
        break;
      }
     
      /* Ber bruker om å taste inn de neste karakterene */
      System.out.print("Angi karakterer for student(store bokstaver):");
    }
   
    /* Tittelen til karakterstatistikken */
    System.out.println("Oversikt over karakterer:");
   
    /* For løkke med switch setning inni. Denne teller opp hvilke og hvor mange karakterer som ble gitt */
    for(int teller = 0 ; teller < karakterer.length() ; teller++){
      tegn = karakterer.charAt(teller);
      switch (tegn) {
        case 'A':
          a++; break;
        case 'B':
          b++; break;
        case 'C':
          c++; break;
        case 'D':
          d++; break;
        case 'E':
          e++; break;
        case 'F':
          f++; break;
        default:
          System.out.println(tegn + " er ikke A-F! ");
      }
    }
   
    /* Utskrift av karakterstatistikk */
    System.out.println("A: " + a);
    System.out.println("B: " + b);
    System.out.println("C: " + c);
    System.out.println("D: " + d);
    System.out.println("E: " + e);
    System.out.println("F: " + f);
  }
}

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It's still partially in English, but the structure is the same as any language, just follow the bread crums :P

Please edit your post to use code tags (see my signature below in blue).

Quote:

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Originally Posted by Exception

I am from norway btw, therefore I have a lot of the program written in norwegian.

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Weird language ;D

@ Dieter

lol, thanks XD