JAVA:

Write a recursive method named sumOfSquares that accepts an integer parameter n and returns the sum of squares from 1 to n. For example, the call of sumOfSquares(3) should return 1² + 2² + 3² = 14. If your method is passed 0, return 0. If passed a negative number, your method should throw an IllegalArgumentException.

Constraints: Your method must be recursive. Do not use loops or data structures.