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
  // 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: Swap two elements in a linked list

Java Code Editor:

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Java: Tips of the Day


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