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 StringCountwithOutHashMap {
  public static void main(String[] args) {
    System.out.println("Plz Enter Your String: ");
    Scanner sc = new Scanner(System.in);
    String s1 = sc.nextLine();
    int count = 0;
    for (int i = 0; i < s1.length(); i++) {
        for (int j = 0; j < s1.length(); j++) {
            if (s1.charAt(i) == s1.charAt(j)) {
                count++;
            } 
        } 
        System.out.println(s1.charAt(i) + " --> " + count);
        String d = String.valueOf(s1.charAt(i)).trim();
        s1 = s1.replaceAll(d, "");
        count = 0;
    }}}