/**
 * Generic version of the Box class. 
 * source: http://download.oracle.com/javase/tutorial/java/generics/gentypes.html
 */
public class Box<T> {

    private T t; // T stands for "Type"          

    public void add(T t) {
        this.t = t;
    }

    public T get() {
        return t;
    }
}