Count letters in a string Java

Question

I\'m doing an assignment where I\'ll have to code a program to read in a string from user and print out the letters in the string with number of occurrences. E.g. \"Hell

Answer 1

You don't need 26 switch cases. Just use simple code to count letter:

    String input = userInput.toLowerCase();// Make your input toLowerCase.
    int[] alphabetArray = new int[26];
    for ( int i = 0; i < input.length(); i++ ) {
         char ch=  input.charAt(i);
         int value = (int) ch;
         if (value >= 97 && value <= 122){
         alphabetArray[ch-'a']++;
        }
    }

After done count operation, than show your result as:

 for (int i = 0; i < alphabetArray.length; i++) {
      if(alphabetArray[i]>0){
        char ch = (char) (i+97);
        System.out.println(ch +"  : "+alphabetArray[i]);   //Show the result.
      }         
 }