Find duplicate characters in a String and count the number of occurances using Java

Question

How can I find the number of occurrences of a character in a string?

For example: The quick brown fox jumped over the lazy dog.

Some example

Answer 1

public class CountH {

    public static void main(String[] args) {
        String input = "Hi how are you";

        char charCount = 'h';
        int count = 0;

        input = input.toLowerCase();

        for (int i = 0; i < input.length(); i++) {

            if (input.charAt(i) == charCount) {
                count++;
            }

        }

        System.out.println(count);
    }
}