Java: Swap two elements in a linked list

Last update on May 22 2025 13:14:40 (UTC/GMT +8 hours)

15. Swap LinkedList Elements

Write a Java program that swaps two elements in a linked list.

Sample Solution:-

Java Code:

import java.util.*;

public class Exercise15 {
 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");
  l_list.add("Pink");
  l_list.add("orange");
  // print the list
  System.out.println("The Original linked list: " + l_list);
  
   //Swapping 1st(index 0) element(Red) with the 3rd(index 2) element (Black)
    Collections.swap(l_list, 0, 2);
    System.out.println("The New linked list after swap: " + l_list);
 }
}

Sample Output:

The Original linked list: [Red, Green, Black, Pink, orange]            
The New linked list after swap: [Black, Green, Red, Pink, orange]

Pictorial Presentation:

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Java program to swap two elements at specified indices in a linked list using a temporary variable.
• Write a Java program to implement swapping of two linked list elements using recursion.
• Write a Java program to swap the first and last elements of a linked list and then display the updated list.
• Write a Java program to swap two elements in a linked list using Java Collections.swap() and verify the swap.

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Java Code Editor:

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