Java Programming by Pearson

The Collection Framework • 545

Explanation: In this program, a LinkedList instance LL1 is created and fi ve integer objects added at the

beginning of the LL1. A new LinkedList instance LL2 is then created from LL1. LL1 list is cleared using

clear method. The contains method is then made use of to check whether list LL2 contains 2 as object;

the method returns true. Next, the index of the object 2 is displayed. The program also demonstrates the

usage of set method for setting the value at specifi ed index. Note the addLast method is equivalent to

add method seen earlier. For adding element anywhere in the list, the methods add(index, object) form ...