Anagrams3.java

import java.util.HashMap;
public class Anagrams3 {

    public static boolean isAnagram(String str1, String str2) {
        str1 = str1.replaceAll("\\s", "").toLowerCase();
        str2 = str2.replaceAll("\\s", "").toLowerCase();

        if (str1.length() != str2.length()) {
            return false;
        }

        HashMap<Character, Integer> map = new HashMap<>();

        for (char c : str1.toCharArray()) {
            map.put(c, map.getOrDefault(c, 0) + 1);
        }

        for (char c : str2.toCharArray()) {
            if (!map.containsKey(c)) return false;

            map.put(c, map.get(c) - 1);

            if (map.get(c) == 0) {
                map.remove(c);
            }
        }

        return map.isEmpty();
    }

    public static void main(String[] args) {
        String s1 = "Dormitory!";
        String s2 = "Dirty Room!";

        if (isAnagram(s1, s2)) {
            System.out.println("The strings are anagrams.");
        } else {
            System.out.println("The strings are NOT anagrams.");
        }
    }
}