in java, Explain or provide an example showing how a NullPointerException could arise.

How to use StdRandom.uniform() in java?

Java provides a mechanism that enables a program to be executed from the command line, as an application. Java runtime execution works on the basis that the class executed must have a: (constructor? inner class? method?) named `main’ that is: (final? static? local?) , public and void. This should take an : (StringBuffer? ArrayList? Array?) of Strings as its only argument. Execution is begun by (calling this method? clicking the BlueJ Run button? selecting this method from the dropdown menu?) . Select the correct answer.

in java

Please answer question. This is pertaining to Java programming language 2-13

Given string inputStr on one line and integers idx1 and idx2 on a second line, output "Match found" if the character at index idx1 of inputStr is equal to the character at index idx2. Otherwise, output "Match not found". End with a newline. Ex: If the input is: eerie 4 1 then the output is: Match found Note: Assume the length of string inputStr is greater than or equal to both idx1 and idx2.

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 */     } }

Using Java.

StringFun.java import java.util.Scanner; // Needed for the Scanner class 2 3 /** Add a class comment and @tags 4 5 */ 6 7 public class StringFun { /** * @param args not used 8 9 10 11 12 public static void main(String[] args) { Scanner in = new Scanner(System.in); System.out.print("Please enter your first name: "); 13 14 15 16 17 18 System.out.print("Please enter your last name: "); 19 20 21 //Output the welcome message with name 22 23 24 //Output the length of the name 25 26 27 //Output the username 28 29 30 //Output the initials 31 32 33 //Find and output the first name with switched characters 34 //All Done! } } 35 36 37