// A simple class of generic pairs.  We can use a Pair<A,B>
// object to associate an object of type A with an object of type B.

public class Pair<A,B> {
    private A first;
    private B second;

    public Pair(A a, B b) {
    	first = a;
		second = b;
    }

    public A getFirst() {
    	return first;
    }

    public B getSecond() {
    	return second;
    }
    
    public void setFirst(A a) {
    	first = a;
    }
    
    public void setSecond(B b) {
    	second = b;
    }
}