Java program find occurrences of a character in string ?

Java find occurrences of a character in string ?

• In java, we can find the occurrences of each character in given string using for loop and hashmap.

import java.util.HashMap;
import java.util.Map;
import java.util.Set;

public class occurences {
    public static void main(String[] args) {
    String str = "elephantELEPHANT";

    char c[] = str.toCharArray();

    Map<Character, Integer> hm = new HashMap<Character, Integer>();
    for (char ch : c) {
        if (hm.containsKey(ch)) {
            hm.put(ch, hm.get(ch) + 1);
        } else {
            hm.put(ch, 1);
        }
    }
    System.out.println("Final Hash Map with occurences of each character=\n" + hm);

    System.out.println("we can also get each value using keySet()");
    Set<Character> s = hm.keySet();

    for (char cha : s) {
        System.out.print(cha + "=" + hm.get(cha) + " ");
    }
  }
}

Output:

Java program find occurrences of a character in string

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