Which Java library package is needed to be imported for getting input from keyboard?

In this java program, please explain the code and the output of the program. Source Code: import java.util.Scanner; public class Main { public static void main(String[] args) {  Scanner scanner = new Scanner(System.in);  String name;  String department;  double baseSalary;  String joinedDate;   System.out.print("Enter the Name : ");  name = scanner.nextLine();   System.out.print("Enter the Department : ");  department = scanner.nextLine();   System.out.print("Enter the Joined Date : ");  joinedDate = scanner.nextLine();   System.out.print("Enter the Base Salary : ");  baseSalary = scanner.nextDouble();   StaffDeatils staff = new StaffDeatils(name, department, baseSalary, joinedDate);   System.out.println();  staff.toString();  }} class StaffDeatils { private String name; private String department; private double baseSalary; private String joinedDate;  public StaffDeatils(String name, String department, Double salary, String joinedDate) {  this.name = name;  this.department =…

import java.util.Scanner; public class CircleAndSphereWhileLoop{    public static final double MAX_RADIUS = 500.0;        public static void main(String[] args)    {        Scanner in = new Scanner(System.in);         // Step 2: Read a double value as radius using prompt         //         "Enter the radius (between 0.0 and 500.0, exclusive): "         // Step 3: While the input radius is not in the ragne (0.0, 500.0)        //            Display a message on one line (ssuming input value -1)        //               "The input number -1.00 is out of range."        //            Read a double value as radius using the same promt                 double circumference = 2 * Math.PI * radius;        double area = Math.PI * radius * radius;        double surfaceArea = 4 * Math.PI * Math.pow(radius, 2);        double volume = (4 / 3.0) * Math.PI * Math.pow(radius, 3);                // Step 4: Display the radius, circle circumference, circle area,        //         sphere surface area, and…

Please give a full detailed optimized solution in Java 8 for the given problem, use the example code provided as well. Please provide comments and screenshots of code and output. Also, add the time/space complexity and the reason for it.Java 8 Code Example:import java.io.*; import java.util.*; import java.text.*; import java.math.*; import java.util.regex.*; public class Solution {     public static void main(String args[] ) throws Exception {         /* Enter your code here. Read input from STDIN. Print output to STDOUT */     } }