PLEASE FILL IN THE BLANKS

Using Java exception handling.

Key in the following Java program that will use exception handling to observe random number generation

import java.util.Random;

public class ExceptionTest1

{

public static void main(String[] args)

{

int a = 0, b = 0, c = 0;

int good = 0, bad = 0;

Random r = new Random();

for(int i = 0; i < 32000; i++)

{

try

{

b = r.nextInt();

c = r.nextInt();

a = 12345 / (b/c);

System.out.println("Ok at " + i + " b: " + b + " c: " + c);

good++;

}

catch (ArithmeticException e)

{

System.out.println("/ by zero at " + i + " b: " + b + " c: " + c );

bad++;

}

}

System.out.println("Good: " + good + " Bad: " + bad);

}

Run the program three times, noting the number of good and bad results:

1a) Number of occurrences:

1) Good:______________ Divide by zero: _______________

2) Good:______________ Divide by zero: _______________

3) Good: ____________ Divide by zero: _________________

1b) What is the deciding factor for division by zero?

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Create a new function called throwOne() that will throw an arithmeticException:

private static void throwOne()

{

System.out.println("Begin throwOne.");

if (3 == 3)

throw new ArithmeticException("demo");

System.out.println("End throwOne.");

}

Comment out the existing content of main() and add a call to throwOne() plus a call to s.o.p. to indicate a normal end-of-job:

public static void main(String[] args)

{

throwOne();

System.out.println("Exiting normally...");

}

2a) Run your program. What is the output?

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Add a try-catch block to surround the call to throwOne():

public static void main(String[] args)

{

try

{

throwOne();

}

catch (Exception e)

{

System.out.println(e);

}

System.out.println(Exiting...");

}

2b) Run your program again. Now what is the output?

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Change the exception that is thrown in throwOne() to IlligalAccessException:

private static void throwOne()

{

System.out.println("Begin throwOne.");

if (3 == 3)

throw new IllegalAccessException("demo");

System.out.println("End throwOne.");

}

3a) Try to compile your program. Why do you get an error?

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3b) How would you fix the program's problem?

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3c) What is your program's output after you've fixed the problem?

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