// generic class example
// A and B stand in for types to be specified
// no problem inheriting from ordinary class
public class MyPair <A, B> extends Namey{
	
	private A first;
	private B second;


   // can have default constructor, so we can set non-generic vars
   public MyPair() {
       super("An Empty Pair");
       first = null; // this is really all we can do with generic instance vars here
       second = null; 
    }

	// constructor
	public MyPair(A vala, B valb){
		super("My Pair ");
		setFirst(vala);
		setSecond(valb);
	}

	// constructor
	public MyPair(A vala, B valb, String nval){
		super(nval);
		setFirst(vala);
		setSecond(valb);
	}


	// accessor for first
	public A getFirst() {
		return first;
	}

	// mutator for first
	public void setFirst(A val) {
		first = val;
	}

	// accessor for second
	public B getSecond() {
		return second;
	}

	// mutator for second
	public void setSecond(B val) {
		second = val;

		// this line doesn't make sense even if second will sometimes be a Cat
		// when writing generic class, treat unknown types as Object
		// val.miaow();
	}

        // compare for equality
        public boolean equals(Object other ) {
            if (other != null && other instanceof MyPair) {
                MyPair p = (MyPair)other;
                return this.getName().equals(p.getName()) &&
                        this.getFirst().equals(p.getFirst()) &&
                        this.getSecond().equals(p.getSecond());
            }
            return false;
        }


	// string is the pair in parens
	public String toString() {
		return getName() + ": ("+getFirst()+", "+getSecond()+")";
	}
}