Question

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.

Please use Java, thanks.

Answer 1

Thanks for the question, here are the 4 classes you will be needing for this problem.

Let me know for any help !

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public class EndOfSentenceException extends Exception {



    public EndOfSentenceException( String message) {

        super(message);



    }

}

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 public class PunctuationException extends EndOfSentenceException {



    public PunctuationException() {

        super("");

    }



    public PunctuationException(String message) {

        super(message);

    }

}

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public class CommaException extends PunctuationException {



    public CommaException(String message) {

        super(message);

    }

}

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public class Main {



    public static void main(String[] args) {



        String testSentences[] ={"Hi how are you$","I am sick@","I am perfect!","Where were you,"};



        for(String sentence:testSentences){



            try {

                System.out.println("Test Sentence: "+sentence);

                char lastLetter = sentence.charAt(sentence.length() - 1);

                if (lastLetter == ',') {

                    throw new CommaException("You can\'t end a sentence in a comma");

                } else if (!(lastLetter == '.' || lastLetter == '!' || lastLetter == '?')) {

                    throw new PunctuationException("You can\'t end a sentence without a \'.\' or \'!\' or \'?\'");

                }

                System.out.println("The sentence ends correctly.");

            }

                catch (EndOfSentenceException ese){

                System.out.println(ese.getMessage());

            }

        }

    }

}

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