w3resource

Java Collection, LinkedList Exercises: Swap two elements in a linked list

Java Collection, LinkedList Exercises: Exercise-15 with Solution

Write a Java program of swap 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:

Java Collection Linked-list: Swap two elements in a linked list.

Flowchart:

Flowchart: Swap two elements in a linked list

Java Code Editor:

Contribute your code and comments through Disqus.

Previous: Remove all the elements from a linked list.
Next: Shuffle the elements in a linked list.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



Share this Tutorial / Exercise on : Facebook and Twitter

Java: Tips of the Day

getEnumMap

Converts to enum to Map where key is the name and value is Enum itself.

public static <E extends Enum<E>> Map<String, E> getEnumMap(final Class<E> enumClass) {
    return Arrays.stream(enumClass.getEnumConstants())
            .collect(Collectors.toMap(Enum::name, Function.identity()));
}

Ref: https://bit.ly/3xXcFZt