Validating User Input for Double Value || Java programming || Input Validation || DoWhile & IfElse

User Input Validation for Double Value in JAVA Programming:
Uses of Scanner, Do-While and If-Else Loops. Code for the Entire Programme is provided below:

package com.company;

// importing Scanner Package
import java.util.Scanner;

//Class Initialisation
public class ValidatingUserInputForDoubleValue {

//Main Method Initialisation
public static void main (String[] args){

//Declaring Double Variables
double FirstUserInput = 0, SecondUserInput = 0, TotalSum = 0;
//Declaring Boolean Variable
boolean LoopResultsSuccessful;

// Initialising Scanner Variable
Scanner ReceiveUserInput = new Scanner (System.in);

// Do-While Loop Start
do {
//Requesting Users for First User Input
System.out.println("Please, Enter the First Double Number: ");

// If-Else Loop Start
if (ReceiveUserInput.hasNextDouble()) // Checking whether the user input is Double or not.
{
// Assigning the value from user into the First Double Variable
FirstUserInput = ReceiveUserInput.nextDouble();
// Initialising the Boolean Result as True.
LoopResultsSuccessful = true;
}
else {
//Providing Error Message to the User
System.out.println("That is not a double value. Please try again.");
// Initialising the Boolean Result as False.
LoopResultsSuccessful = false;
// Erasing the Wrong Value from the Scanner Variable so that User can Reinsert the New Value into the System.
ReceiveUserInput.next();
} // If-Else Loop End
} while (!(LoopResultsSuccessful));
//Do-While Loop End

//Do-While Loop Start
do {
//Requesting Users for First User Input
System.out.println("Please, Enter the Second Double Number: ");
if (ReceiveUserInput.hasNextDouble()) { // Checking whether the user input is Double or not.
// Assigning the value from user into the Second Double Variable
SecondUserInput = ReceiveUserInput.nextDouble();
// Initialising the Boolean Result as True.
LoopResultsSuccessful = true;
}
else {
System.out.println("That is not an double value. Please try again.");
// Initialising the Boolean Result as False.
LoopResultsSuccessful = false;
// Erasing the Wrong Value from the Scanner Variable so that User can Reinsert the New Value into the System.
ReceiveUserInput.next();
} // If-Else Loop End
} while (!(LoopResultsSuccessful));
//Do-While Loop End

// Closing the Scanner Method.
ReceiveUserInput.close();

// Adding the Value of Variables which have been collected from the User.
TotalSum = FirstUserInput + SecondUserInput;

//Displaying Total Sum of the both Variables.
System.out.println ("The Sum of Two Double Numbers is: " +TotalSum);


} //Main Method End
} // Class End