Vectors can store heterogeneous objects because everything is saved in terms of Object.

Java Code:
		String string = new String ("MyString");
		Integer integer = new Integer(2);
		Vector vector = new Vector();
		vector.add(string);
		vector.add(integer);
Vector wont be able to contain if you heterogeneous objects bind it with a type like this:

Java Code:
                Vector <String> vector = new Vector<String>();