2. Use inheritance to create a hierarchy of Exception classes -- EndOfSentenceException, PunctuationException, and CommaException. EndOfSentenceException is the parent class to PunctuationException, which is the parent class to CommaException. Test your classes in a Driver class with a main method that asks the user to input a sentence. If the sentence ends in anything except a period (.), exclamation point (!), or question mark (?), the program should throw a PunctuationException. If the sentence specifically ends in a comma, the program should throw a CommaException. Use a catch block to catch all EndOfSentenceExceptions, causing the program to print a message and terminate. If a general PunctuationException is caught, the program should print "The sentence does not end correctly." If a CommaException is caught, the program should print "You can't end a sentence in a comma." If there are no exceptions, the program should print "The sentence ends correctly." and terminate.

See explaination

Explanation:

EndOfSentenceException.java

//Create a class EndOfSentenceException that

//extends the Exception class.

class EndOfSentenceException extends Exception

{

//Construtor.

EndOfSentenceException(String str)

{

System.out.println(str);

}

}

CommaException.java

//Create a class CommaException that extends the class

//EndOfSentenceException.

class CommaException extends EndOfSentenceException

{

//Define the constructor of CommaException.

public CommaException(String str)

{

super(str);

}

}

PunctuationException.java

//Create a class PunctuationException that extends the class

//EndOfSentenceException.

class PunctuationException extends EndOfSentenceException

{

//Constructor.

public PunctuationException(String str)

{

super(str);

}

}

Driver.java

//Include the header file.

import java.util.Scanner;

//Define the class Driver to check the sentence.

public class Driver {

//Define the function to check the sentence exceptions.

public String checkSentence(String str)

throws EndOfSentenceException

{

//Check the sentence ends with full stop,

//exclamation mark

//and question mark.

if(!(str.endsWith(".")) && !(str.endsWith("!"))

&& !(str.endsWith("?")))

{

//Check the sentence is ending with comma.

if(str.endsWith(","))

{

//Throw the CommaException.

throw new CommaException("You can't "

+ "end a sentence in a comma.");

}

//Otherwise.

else

{

//Throw PunctuationException.

throw new PunctuationException("The sentence "

+ "does not end correctly.");

}

}

//If the above conditions fails then

//return this message to the main function.

return "The sentence ends correctly.";

}

//Define the main function.

public static void main(String[] args)

{

//Create an object of Scanner

Scanner object = new Scanner(System.in);

//Prompt the user to enter the sentence.

System.out.println("Enter the sentence:");

String sentence=object.nextLine();

//Begin the try block.

try {

//Call the Driver's check function.

System.out.println(new

Driver().checkSentence(sentence));

}

//The catch block to catch the exception.

catch (EndOfSentenceException e)

{}

}

}

answerlibraries;