letter count code example

Example 1: count letters numbers and characters

public static String countLetter(String str){
    String abc=str;
    int a=0,b=0;
    while(str.length()>0){
        int i=0;
        String ch=str.substring(i,i+1);
        if(ch.matches(".*[a-zA-Z].*")){
            a++;
        }else if (ch.matches(".*[0-9].*")){
            b++;
        }
        str=str.substring(i+1);
    }
    return abc + " has "+a+" letters "+b+" digit 
          and "+(abc.length()-(a+b))+" other characters ";
      
      
OR+++++++++++++++++++++++++++++++++
      
      
  static void findSum(String str)
{
   int total= str.length();
   str = str.replaceAll("\\s", "");
   int num =0;
   int letter=0;
   int i=0;
   while(i "+num +
                      " numbers -> "+ (total-letter-num) + " other chars");
}

Example 2: charcount

//Calculate the times a character occurs
	public static int charCount(String userInput) {
		
		//convert the string to a char array
		char[] StringArray = userInput.toCharArray();
		
		//hashmap that stores the characters. key will be the time it occures
		HashMapcharCount = new HashMap();