Chapter 9.2, Problem 19STQ

Explanation of Solution

Given program:

DoubleException.java:

//Define a class

public class DoubleException extends Exception

{

    //Default constructor

    public DoubleException()

    {

        //Call the method from parent class

        super("Double exception thrown!");

    }

    //Parameterized constructor

    public DoubleException(String message)

    {

        //Call the parent class's method

        super(message + " " + message);

    }

}

Main.java:

//Define the main class

class Main

{

    //Define the main method

    public static void main(String[] args)

    {

        //Try block

        try

        {

            //Print the statement

System.out.println("try block entered:");

            //Declare a variable

            int number = 42;

            //Check if the value is greater than 0

            if(number > 0)

        ...