HackerRank Java Anagrams problem solution

In this HackerRank Java Anagrams problem in the java programming language, Two strings, a and b, are called anagrams if they contain all the same characters in the same frequencies. For this challenge, the test is not case-sensitive. For example, the anagrams of CAT are CAT, ACT, tac, TCA, aTC, and CtA.

HackerRank Java Anagrams problem solution.

import java.util.Scanner;

public class Solution {

    static boolean isAnagram(String s1, String s2) {
        // Complete the function
        s1=s1.toLowerCase();
        s2=s2.toLowerCase();
        
        if(s1.length()==s2.length())

        {
            int[] a = new int[256];
            int[] b = new int[256];
            for (int i = 0; i < s1.length(); i++) {
                a[(int) s1.charAt(i)] += 1;
                b[(int) s2.charAt(i)] += 1;
            }
            for (int i = 0; i < 256; i++) {
                if (a[i] != b[i])
                    return false;

            }
            return true;
        }
        else
        {
            return false;
        }
    }

    public static void main(String[] args) {
    
        Scanner scan = new Scanner(System.in);
        String a = scan.next();
        String b = scan.next();
        scan.close();
        boolean ret = isAnagram(a, b);
        System.out.println( (ret) ? "Anagrams" : "Not Anagrams" );
    }
}

Second solution

import java.io.*;
import java.util.*;

public class Solution {

   static boolean isAnagram(String A, String B) {
      
       char[] arrA = A.toUpperCase().toCharArray();
       char[] arrB = B.toUpperCase().toCharArray();
       Arrays.sort(arrA);
       Arrays.sort(arrB);
       
       for(int i = 0; i < A.length(); i++)
           try {
               if(Character.toUpperCase(arrA[i]) != Character.toUpperCase(arrB[i])) return false;
           } // end try
           catch(Exception e) {
               return false;
           } // end catch
       return true;
   } // end isAnagram
    public static void main(String[] args) {
        
        Scanner sc=new Scanner(System.in);
        String A=sc.next();
        String B=sc.next();
        boolean ret=isAnagram(A,B);
        if(ret)System.out.println("Anagrams");
        else System.out.println("Not Anagrams");
        
    } // end main
} // end class

A solution in java8 programming.

import java.io.*;
import java.util.*;

public class Solution {

   static boolean isAnagram(String A, String B) {
       if(A == null || B == null) {
           if(A != null || B != null) {
               return false;
           }
           return true;
       }
       A = A.toLowerCase();
       B = B.toLowerCase();
       char[] aArr = A.toCharArray();
       char[] bArr = B.toCharArray();
       Arrays.sort(aArr);
       Arrays.sort(bArr);
       String aSorted = new String(aArr);
       String bSorted = new String(bArr);
       
       return aSorted.equals(bSorted); 
       
       
   
   }
    public static void main(String[] args) {
        
        Scanner sc=new Scanner(System.in);
        String A=sc.next();
        String B=sc.next();
        boolean ret=isAnagram(A,B);
        if(ret)System.out.println("Anagrams");
        else System.out.println("Not Anagrams");
        
    }
}