/** Sample code from JJ pg 122 */
/** Modified the catch ExitException to use System.exit() */


import java.io.*;

public class ExceptionTest {

    public static void main(String[] args){
    
        boolean finished = false;
        do {
            try{
                processUserInput();
            } catch (VowelException x) {
                System.out.println("A vowel exception occurred.");
            } catch (BlankException x) {
                System.out.println("A blank exception occurred.");
            } catch (ExitException x) {
//                System.out.println("An exit exception occurred.");
//                finished = true;
                  System.exit(0);   // finally clause not executed
            } finally {
                System.out.println("This is the finally clause.");
            }
        
        } while (!finished);
    }

static void processUserInput() throws VowelException,
                                      BlankException,
                                      ExitException {

    System.out.print("Enter a character: ");
    System.out.flush();
    char ch;
    
    try {
        BufferedReader kbd = new BufferedReader(new InputStreamReader(System.in));
        String line = kbd.readLine();
        if(line.length() == 0)
             ch = ' ';
        else
            ch = Character.toUpperCase(line.charAt(0));
   } catch (IOException x) {
        System.out.println("An IOException occurred.");
        return;
   }
   
   switch(ch) {
    case 'A':
    case 'E':
    case 'I':
    case 'O':
    case 'U':
        throw new VowelException();
    case ' ':
        throw new BlankException();
    case 'X':
        throw new ExitException();
   }                                            
}
}

class VowelException extends Exception {}
class BlankException extends Exception {}
class ExitException extends Exception {}