I want Java code that can compare in this way (for example):

<1 2 3 4>  = <3 1 2 4>
<1 2 3 4> != <3 4 1 1>

I can't use hashmap table or anything; just pure code without library.

I know there are two ways.

1. sort them and compare the array index by index

2. use two for loops and compare the outer index with the inner index. I have been trying with this but still not working:

   for(int i = 0; i < n; i++)
   {
       for(int j = 0; j < n; j++)
       {   
           if(a[i] != a[j] && j == n)
               return false;
       }
   }
   return true;
   

anything wrong with the code ? thanks