HANDLING EXCEPTIONS AND EVENTS - Java Programming: From Problem Analysis to Program Design - page 759

The program in Example 11-13 uses the class MyDivisionByZeroException

designed in Example 11-12.

EXAMPLE 11-13

import java.util.*;

public class MyDivisionByZeroExceptionTestProg
{

static Scanner console = new Scanner(System.in);

public static void main(String[] args)
{

double numerator; //Line 1

double denominator; //Line 2

try //Line 3

{

System.out.print("Line 4: Enter the "
+ "numerator: "); //Line 4

numerator = console.nextDouble(); //Line 5

System.out.println(); //Line 6

System.out.print("Line 7: Enter the "
+ "denominator: "); //Line 7

denominator = console.nextDouble(); //Line 8

System.out.println(); //Line 9

if (denominator == 0.0) //Line 10
throw new MyDivisionByZeroException(); //Line 11

System.out.println("Line 12: Quotient = "
+ (numerator / denominator)); //Line 12

}
catch (MyDivisionByZeroException mdbze)

//Line 13

1
1

{

System.out.println("Line 14: "
+ mdbze.toString()); //Line 14

}
catch (Exception e)

//Line 15

{

System.out.println("Line 16: "
+ e.toString()); //Line 16

}

}

}

Sample Runs:
Sample Run 1: (In this sample run, the user input is shaded.)
Line 4: Enter the numerator: 25

Line 7: Enter the denominator: 4