"insert code in comments

class LessThanZeroException extends Exception $\{//$define a parameterless construc XR$07$ tor public LessThanZeroException$()\{$ super$(""$this is an ArrayIndexOutOfBoundsException defined by users""$)$; $\}$

$//$define a constructor with a parameter which is a message provided by $//$users$,$ and tells what exception has happened. public LessThanZeroException$($String str$)\{$ super$($str$)$; $\}\}$ class Q$1\_$Class extends Shape$\_$Abstract$\_$Class $\{$ double r $=-1\mathrm{.}0$; public void CalculateArea$()\{$

$/*$ Override the method CalculateArea$()$ Add the missing code based on the comments below: It will perform the following operations: ask the user to input a double number representing the radius of a circle if the user's input is less than zero, it will throw a user$-$defined exception: LessThanZeroException the exception will be handled by a try...catch.otherwise, calculate the area of the circle. $*/\}\}$ public void Circumference$()\{$

$/*$ Override the method Circumference$()$ Add the missing code based on the comments below: It will perform the following operations: ask the user to input a double number representing the radius of a circle. if the user's input is less than zero, it will throw a user$-$defined exception:

LessThanZeroException the exception will be handled by a try...catch otherwise, calculate the circumference of the circle. $*/\}$ public void CalculateVolume$()\{/*$ Override the method CalculateVolume$()$ Add the missing code based on the comments below: It will perform the following operations: ask the user to input a double number representing the radius of a ball if the user's input is less than zero, it will throw a user$-$defined exception: LessThanZeroException the exception will be handled by a try...catch otherwise, calculate the volume of the ball. $*/\}\}$ public class Q$1\_$Test $\{$ public static void main$($String$[]$ args$)\{$ Q$1\_$Class q$1=$ new Q$1\_$Class$()$; q$1.$CalculateArea$()$; q$1.$Circumference$()$; q$1.$CalculateVolume$()$; $\}\}"$