JAVA Recursive method to test if a number is even?

public boolean isEven(int val) {

// Return true if val is even and false otherwise.

// Without using recursion this could be simply: return val % 2 == 0.

// However, you must use recursion to implement this method, and cannot use %.

// You must correctly handle all integers, positive or negative.

// A negative number is even if its negation is even.