Java Collection, LinkedList Exercises: Remove first and last element from a linked list

Java Collection, LinkedList Exercises: Exercise-13 with Solution

Write a Java program to remove first and last element from a linked list.

Sample Solution:-

Java Code:

import java.util.*;

  public class Exercise13 {
  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);

  // Remove the first element
    Object firstElement = l_list.removeFirst();
    System.out.println("Element removed: "+ firstElement);
  // Remove the last element
    Object lastElement = l_list.removeLast();
    System.out.println("Element removed: "+ lastElement);
    System.out.println("The New linked list: " + l_list);

Sample Output:

The Original linked list: [Red, Green, Black, Pink, orange]            
Element removed: Red                                                   
Element removed: orange                                                
The New linked list: [Green, Black, Pink]

Pictorial Presentation:

Java Collection Linked-list: Remove first and last element from a linked list.


Flowchart: Remove first and last element from 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