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import java.util.LinkedList;

public class Main {
    public static void main(String[] args) {
        LinkedList<String> lList = new LinkedList<String>();
        lList.add("100");
        lList.add("200");
        lList.add("300");
        lList.add("400");
        lList.add("500");
        System.out.println("The first element of the linked list is: " + lList.getFirst());
        System.out.println("The last element of the linked list is: " + lList.getLast());
    }
}

The first element of the linked list is: 100
The last element of the linked list is: 500