public class Bag<E> {
	private E item;

	public void setItem(E x) {
		item = x;
	}

	public E getItem() {
		return item;
	}

	public static void main(String[] args) {
		Bag<Integer> bagInt = new Bag<Integer>();
		bagInt.setItem(new Integer(42));
		Bag<String> bagStr = new Bag<String>();
		bagStr.setItem("A very fine string");

		// which of the following (if any) are legal?
		// bagInt.setItem("A very fine string");
		// bagInt.setItem("42");
		// bagStr.setItem(new Integer(42));
		// bagStr.setItem(new Object());
		// bagInt=bagStr;
		// bagInt.setItem(42);
		// Bag<Bag<String>> bagBag = new Bag<Bag<String>>();

		// this is apparently legal; what type is 'E'?
		Bag someBag = new Bag();

		/*
		* //what's wrong with the following code (once uncommented)? String s =
		* "x"; someBag.setItem(s); s = someBag.getItem();
		*/
	}
}