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Frequency of Characters in a String Program - Java Programs

Write a program to input a string in uppercase and print the frequency of each character.
Example:
INPUT: COMPUTER HARDWARE
OUTPUT:
Characters    Frequency
A                     2
C                     1
D                     1
E                     2
H                     1
M                     1
O                     1
P                     1
R                     3
T                     1
U                     1
W                    1

Java


 import java.util.Scanner;
class Frequency{
    public static void main(String args[]){
        Scanner in = new Scanner(System.in);
        System.out.print("Enter the string: ");
        String s = in.nextLine().toUpperCase();
        System.out.println("CHARACTERS\tFREQUENCY");
        for(char i = 'A'; i <= 'Z'; i++){
            int f = 0;
            for(int j = 0; j < s.length(); j++){
                if(i == s.charAt(j))
                    f++;
            }
            if(f > 0)
                System.out.println(i + "\t\t" + f);
        }
    }
}

Output

 
 OUTPUT  : 
Enter the string: COMPUTER HARDWARE
CHARACTERS  FREQUENCY
     A                        2
     C                        1
     D                        1
     E                        2
     H                        1
     M                        1
     O                        1
     P                        1
     R                        3
     T                        1
     U                        1
     W                        1