recursion - write and test a method PrintSquare -

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write , test method printsquares has integer parameter n, , prints squares of integers 1 n, separated commas. should print squares of odd integers in descending order first , following squares of integers in ascending order. not print newline character. should throw illegalargumentexception if specified integer less 1. example: printsquares(4) should print 9, 1, 4, 16 printsquares(1) should print 1 printsquares(7) should print 49, 25, 9, 1, 4, 16

there go, hope teacher ok (this throw exceptions if enter negetive numbers , adds useless comma @ end can fix if bothers you) 

    public static void printorder(int n) {         decorderodd(n);         acsordereven(1, n);     }     public static void decorderodd(int n) {         if (n > 0)         {             if (n%2 == 1)             {                 system.out.print(n*n + ", ");                 decorderodd(n-2);             }             if (n%2 == 0)                 decorderodd(n-1);         }     }      public static void acsordereven(int n, int target) {         if (n <= target)         {             if (n%2 == 0)             {                 system.out.print(n*n + ", ");                 acsordereven(n + 2, target);             }             if (n%2 == 1)                 acsordereven(n+1, target);         }     }

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