Java Collection, LinkedList Exercises: Retrieve but does not remove, the first element of a linked list
Java Collection, LinkedList Exercises: Exercise-20 with Solution
Write a Java program to retrieve but does not remove, the first element of a linked list.
Sample Solution:-
Java Code:
import java.util.*;
public class Exercise20 {
public static void main(String[] args) {
// create an empty linked list
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);
// Retrieve but does not remove, the first element of a linked list
String x = c1.peekFirst();
System.out.println("First element in the list: " + x);
System.out.println("Original linked list: " + c1);
}
}
Sample Output:
Original linked list: [Red, Green, Black, White, Pink] First element in the list: Red Original linked list: [Red, Green, Black, White, Pink]
Pictorial Presentation:
Flowchart:
Java Code Editor:
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