Java.util.LinkedList.get(), getFirst(), getLast() in Java

The conventional method allowing to get the element at particular index is get(). Though in LinkedList its never possible to achieve this without complete traversal, but this method allows the same. Three variants present, all of which are discussed in this article with Exceptions as well.
1. get(int index) : This method returns the element at the specified position in this list.

Declaration : 
    public E get(int index)
Parameters : 
    index :  index of the element to return
Return Value : 
   This method returns the element at the specified position in this list
Exception
     IndexOutOfBoundsException : if the index is out of range
filter_none

edit
close

play_arrow

link
brightness_4
code

// Java code to demonstrate the working
// of get(int index) in linked list
import java.util.*;
public class LinkedListget1 {
public static void main(String[] args)
    {
        // declaring a LinkedList
        LinkedList list = new LinkedList();
  
        // adding elements using add()
        list.add("Geeks");
        list.add(4);
        list.add("Geeks");
        list.add("8");
  
        // printing the whole list
        System.out.println("The elements in List are : " + list);
  
        // using get() to print element at index 3
        // prints 8
        System.out.println("Element at index 3 is : " + list.get(3));
    }
}

chevron_right


Output :

The elements in List are : [Geeks, 4, Geeks, 8]
Element at index 3 is : 8

2. getFirst() : This method returns the first element in this list.



Declaration : 
    public E getFirst()
Return Value : 
    This method returns the first element in this list
Exceptions : 
     NoSuchElementException : if this list is empty
filter_none

edit
close

play_arrow

link
brightness_4
code

// Java code to demonstrate the working
// of getFirst() in linked list
import java.util.*;
public class LinkedListget2 {
public static void main(String[] args)
    {
        // declaring a LinkedList
        LinkedList list = new LinkedList();
  
        // adding elements using add()
        list.add("Geeks");
        list.add(4);
        list.add("Geeks");
        list.add("8");
  
        // printing the whole list
        System.out.println("The elements in List are : " + list);
  
        // using get() to print element at first index
        // prints "Geeks"
        System.out.println("Element at 1st index is : " + list.getFirst());
    }
}

chevron_right


Output :

The elements in List are : [Geeks, 4, Geeks, 8]
Element at 1st index is : Geeks

3. getLast() : This method returns the last element in this list.

Declaration : 
    public E getLast()
Return Value : 
   This method returns the last element in this list
Exceptions : 
   NoSuchElementException : if this list is empty
filter_none

edit
close

play_arrow

link
brightness_4
code

// Java code to demonstrate the working
// of getLast() in linked list
import java.util.*;
public class LinkedListget3 {
public static void main(String[] args)
    {
        // declaring a LinkedList
        LinkedList list = new LinkedList();
  
        // adding elements using add()
        list.add("Geeks");
        list.add(4);
        list.add("Geeks");
        list.add("8");
  
        // printing the whole list
        System.out.println("The elements in List are : " + list);
  
        // using get() to print element at last index
        // prints "8"
        System.out.println("Element at last index is : " + list.getLast());
    }
}

chevron_right


Output:

The elements in List are : [Geeks, 4, Geeks, 8]
Element at last index is : 8

Exceptions

1. IndexOutOfBoundException

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java code to demonstrate the Exceptions
// of get()
import java.util.*;
public class LinkedListExcep1 {
public static void main(String[] args)
    {
        // declaring a LinkedList
        LinkedList list = new LinkedList();
  
        // adding elements using add()
        list.add("Geeks");
        list.add(4);
        list.add("Geeks");
        list.add("8");
  
        // Trying to get element at index 7
        // throws exception
        System.out.println("The element at index 7 is : " + list.get(7));
    }
}

chevron_right


Output :

No Output

Runtime Error :

Exception in thread "main" java.lang.IndexOutOfBoundsException: Index: 7, Size: 4
    at java.util.LinkedList.checkElementIndex(LinkedList.java:555)
    at java.util.LinkedList.get(LinkedList.java:476)
    at LinkedListExcep1.main(LinkedListExcep1.java:22)

2. NoSuchElementException

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java code to demonstrate the Exceptions
// of getFirst()
import java.util.*;
public class LinkedListExcep2 {
public static void main(String[] args)
    {
        // declaring a LinkedList
        LinkedList list = new LinkedList();
  
        // Trying to get first element at index 7
        // throws exception
        System.out.println("The first element of list is : " + list.getFirst());
    }
}

chevron_right


Output :

No Output

Runtime Error :

Exception in thread "main" java.util.NoSuchElementException
    at java.util.LinkedList.getFirst(LinkedList.java:244)
    at LinkedListExcep2.main(LinkedListExcep2.java:15)

This article is contributed by Astha Tyagi. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.



My Personal Notes arrow_drop_up

Improved By : nidhi_biet