Introduction to Programming

Adding elements

The List interface provides two methods for adding an element:

• add(E): This adds the element to the end of the list
• add(index, E): This inserts the element into the specified (by index, starting with zero) position in the list by shifting the element the specified position (if any) and any subsequent elements to the right by adding 1 to their indices

Both methods can throw a RuntimeException if something goes wrong. So, putting a try-catch block around the method makes the code more robust (if the catch block does not simply rethrow the exception but does something meaningful). Read the documentation of the List interface API online and see what the names of the exceptions these methods can throw are and under which conditions ...