[hardwired]

Code:

public class Test {
    public static void main(String[] args) {
        BoxRx box = new BoxRx();
        Object x = "x";
        box.add(x);
        Object whatIsIt = box.get();
        System.out.printf("whatIsIt = %s%nwhat class is it = %s%n",
                           whatIsIt, x.getClass().getName());
        box.add(75);
        whatIsIt = box.get();
        System.out.println("whatIsIt = " + whatIsIt);
    }
}

class BoxRx {

    private Object object;

    public void add(Object object) {
        this.object = object;
    }

    public Object get() {
        return object;
    }
}