Language: Java Use inheritance to create a hierarchy of Exception classes -- End

Question

Language: Java

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.

Explanation / Answer

Answer for Question:

I have written this below code as specified in problem statement and i have presented this below code as of my knowledge. It may helps to you solve the given question.

import java.util.Scanner;

class EndOfSentenceException
{
   void method3() throws EndOfSentenceException
   {
   }
}

class PunctuationException extends EndOfSentenceException
{
   void method2() throws PunctuationException
   {
   }
  
}

class CommaException extends PunctuationException
{
   void method() throws CommaException
   {
   }
}

public class DriverException
{
   public static void main(String[] args)
   {
       Scanner sc = new Scanner(System.in);
       EndOfSentenceException obj = new EndOfInputException();
       System.out.println("Enter String :");
       try
       {
           String str = sc.next();
           if(str.lastIndexOf( '.') == '.' || str.lastIndexOf( '?') == '?' || str.lastIndexOf( '.') == '!')
           {
               System.out.println("The sentence ends correctly.");              
           }
           else if(str.lastIndexOf( ',') == ',')
           {
               obj.method();
           }
           else
           {
               obj.method2();
           }
       }
       catch(PunctuationException e)
       {
           System.out.println("The sentence does not end correctly.");
       }
       catch(CommaException e)
       {
           System.out.println("You can't end a sentence in a comma.");
       }

   }
}

Related Questions

Navigate

• Browse (All)
• Browse L
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.