Java: Test an linked list is empty or not

Last update on December 21 2024 09:36:21 (UTC/GMT +8 hours)

Write a Java program to check if a linked list is empty or not.

Sample Solution:-

Java Code:

import java.util.LinkedList;
import java.util.Collections;
  public class Exercise25 {
  public static void main(String[] args) {
          LinkedList<String> c1= new LinkedList<String>();
          c1.add("Red");
          c1.add("Green");
          c1.add("Black");
          c1.add("White");
          c1.add("Pink");
          System.out.println("Original linked list: " + c1);
          System.out.println("Check the above linked list is empty or not! "+c1.isEmpty());
          c1.removeAll(c1);
          System.out.println("Linked list after remove all elements "+c1);   
          System.out.println("Check the above linked list is empty or not! "+c1.isEmpty());
   }
}

Sample Output:

Original linked list: [Red, Green, Black, White, Pink]                 
Check the above linked list is empty or not! false                     
Linked list after remove all elements []                               
Check the above linked list is empty or not! true 

Pictorial Presentation:

Flowchart:

Java Code Editor:

Contribute your code and comments through Disqus.

Previous: Compare two linked lists.
Next: Replace an element in a linked list.