Originally posted by Steven Young: Option 4 is the only one that adds an Object. All other options are adding a primitive integer. Collections can only have objects, so primitives need to be wrapped in an object,
Right..But due to autoboxing feature in SCJP 5.0 .. will option 3 not be valid as well?
addElement is a method only of Vector class, not of List. I've not understood the difference between the two methods add - addElement. Is it just the return type (boolean for add(E o), void for addElement(E obj)). When is it advisable to use addElement? Thanks
There’s no place like 127.0.0.1. But I'll always remember this tiny ad: