I know this ain't a appropriate way for a soln but I just started solving coding proplems...please give me a tips to improve thanks!

import java.util.Scanner;

public class Solution {

static boolean isAnagram(String a, String b) {
    // Complete the function
  a = a.toLowerCase();
  b = b.toLowerCase();

  if (a.length() != b.length()){
      return false;
  }

   char[] b_arr = b.toCharArray();

   for(int i = 0; i< a.length(); i++){
       boolean matchfound = false;

       for(int j = 0; j< b_arr.length;j++){
           if(a.charAt(i) == b_arr[j]){

               b_arr[j] = '\0';
               matchfound = true;
               break;
           }   
       }
       if(!matchfound){
           return false;
       }
   }  
   return true;  
}

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" );
}

}