Answer to Question #35702 in Java | JSP | JSF for Amy

Question

Write the body of method called maxFrequency:

public static char maxFrequency(String s){

which takes a string (length >=1) as parameter (containing characters from a to z; only small caps), calculates frequencies of characters in the string and returns the character with maximum frequency. For example, if the parameter string is "abcabcabca", the method returns 'a'.

Answer 1

public static char maxFrequency(String s) {
     int length = s.length();         
     int[] array = new int[26];         
     int max = Integer.MIN_VALUE;        
     int index = 0;         
     for (int i = 0; i < length; i++) {            
        array[(int) (s.charAt(i) - 97)]++;         
     }         
     for (int i = 0; i < array.length; i++) {            
         if (max < array[i]) {                 
             max = array[i];                
             index = i;             
           }         
     }         char c = (char) (index + 97);
                return c; 
 
    }