Java: Insert elements into the linked list at the first and last position

Last update on May 22 2025 13:16:03 (UTC/GMT +8 hours)

6. Insert at First and Last

Write a Java program to insert elements into the linked list at the first and last positions.

Sample Solution:-

Java Code:

import java.util.LinkedList;
  public class Exercise6 {
  public static void main(String[] args) {
   // create an empty linked list
     LinkedList<String> l_list = new LinkedList<String>();
   // use add() method to add values in the linked list
          l_list.add("Red");
          l_list.add("Green");
          l_list.add("Black");
     System.out.println("Original linked list:" + l_list);    
   // Add an element at the beginning 
    l_list.addFirst("White");
 
   // Add an element at the end of list 
    l_list.addLast("Pink");
     System.out.println("Final linked list:" + l_list);  
 }
}

Sample Output:

Original linked list:[Red, Green, Black]                               
Final linked list:[White, Red, Green, Black, Pink]

Pictorial Presentation:

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Java program to insert a list of elements at both the beginning and end of a linked list and then merge them.
• Write a Java program to implement methods that separately insert an element at the head and tail, then verify the list order.
• Write a Java program to insert elements at the first and last positions and then reverse the list to check correctness.
• Write a Java program to use recursion to insert elements at both ends of a linked list and then print the resulting list.

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