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Java Collection, LinkedList Exercises: Remove and return the first element of a linked list

Java Collection, LinkedList Exercises: Exercise-19 with Solution

Write a Java program to remove and return the first element of a linked list.

Sample Solution:-

Java Code:

import java.util.*;
public class Exercise19 {
 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);
           
     System.out.println("Removed element: "+c1.pop());
     
     System.out.println("Linked list after pop operation: "+c1);
  }
} 

Sample Output:

Original linked  list: [Red, Green, Black, White, Pink]                
Removed element: Red                                                   
Linked list after pop operation: [Green, Black, White, Pink]

Pictorial Presentation:

Java Collection Linked-list: Remove and return the first element of a linked list.

Flowchart:

Flowchart: Remove and return the first element of a linked list

Java Code Editor:

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Java: Tips of the Day

Choice between Float and Double:

Data type Bytes used Significant figures (decimal)
Float 4 7
Double 8 15

Double is often preferred over float in software where precision is important because of the following reasons:
Most processors take nearly the same amount of processing time to perform operations on Float and Double. Double offers far more precision in the same amount of computation time.

Ref: https://bit.ly/3oj7K2K