***NEED HELP ASAP PLEASE WITH THIS PROBLEM!** - SIMPLE UNDERSTANDING PLEASE!

interface Predicate { boolean eval(Integer j); } Write code for: class Alternate implements Predicate {...} that alternates between true and false, starting with true. For example, the following code: Predicate p = new IsAlternate(); System.out.println( p.eval(0)); System.out.println( p.eval(0)); System.out.println( p.eval(O)); System.out.println( p.eval(O)): produces the output: true false true false