FunAnagrams - Hackerrank

funAnagrams.java

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package practice;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;


/**
 *
 * @author Gabriela Granda T
 */
public class funAnagrams {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        List<String> list = new ArrayList<>();
        list.add("code");
        list.add("doce");
        list.add("ecod");
        list.add("framer");
        list.add("frame");

        test(list);    

    }

    public static void test(List<String> l) {

        Object[] list = l.toArray();
        List<String> listReturn = new ArrayList<>();
        for (int i = 0; i < list.length; i++) {
            for (int j = i + 1; j < list.length; j++) {
                if (isAnagram(list[i].toString(), list[j].toString())) {

                    list[j] = "";
                }
            }
            listReturn.add(list[i].toString());
            Collections.sort(listReturn);
        }
        print(listReturn);
    }

    public static boolean isAnagram(String a, String b) {
        boolean flag = false;

        a = a.toLowerCase().trim();
        b = b.toLowerCase().trim();

        if (a.length() != b.length()) {
            flag = false;
        } else {
            char[] newA = a.toCharArray();
            char[] newB = b.toCharArray();
            HashMap<Character, Integer> map = new HashMap<>();
            for (char letter : newA) {
                if (map.get(letter) != null) {
                    int count = map.get(letter) + 1;
                    map.put(letter, count);
                } else {
                    map.put(letter, 1);
                }
            }

            for (char letterB : newB) {
                if (map.get(letterB) != null) {
                    int count = map.get(letterB) - 1;
                    if (count == 0) {
                        map.remove(letterB);
                    } else {
                        map.put(letterB, count);
                    }

                } else {
                    flag = false;
                    break;
                }
            }
            
            flag = map.isEmpty();

        }

        return flag;
    }

    public static void print(List<String> list) {
        for (String l : list) {
            System.out.print(l + " ");
        }
    }


}