Java Collection, LinkedList Exercises: Test an linked list is empty or not
Java Collection, LinkedList Exercises: Exercise-25 with Solution
Write a Java program to test an 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:
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Java: Tips of the Day
How to sort an ArrayList?
Collections.sort(testList); Collections.reverse(testList);
That will do what you want. Remember to import Collections though!
Ref: https://bit.ly/32urdSe
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