Check whether two strings are anagram of each other

An anagram of a string is another string that contains the same characters, only the order of characters can be different. For example, “abcd” and “dabc” are an anagram of each other.

import java.util.Arrays;

class Anagram
{
    public static  void main(String args[])
    {
        char str1[] = { 't', 'e', 's', 't' };
        char str2[] = { 't', 't', 'e', 's' };

        int n1 = str1.length;
        int n2 = str2.length;

        if(n1 != n2)
            System.out.println("Not a Anogram");
        else
        {
            Arrays.sort(str1);
            Arrays.sort(str2);

            Boolean flag = true;
            for(int i=0;i<n1;i++)
            {
                if(str1[i] != str2[i])
                {
                    flag =false;
                    break;
                }
            }
            if(flag == true)
                System.out.println("Its a Anogram");
            else
                System.out.println("Not a Anogram");
        }
    }
}