Customized exceptions

Customized Exceptions (User-defined Exceptions)
• Sometimes we can create our own exception to meet our programming requirements.Such types of exceptions are called customized exceptions (user-defined exceptions).
Example:
1) InSufficientFundsException
2) TooYoungException
3) TooOldException
Program:
     class TooYoungException extends RuntimeException
          {
             TooYoungException(String s)
                 {
                    super(s);
                 }
          }
          class TooOldException extends RuntimeException
           {
                 TooOldException(String s)
                    {
                           super(s);
                    }
         }
          class CustomizedExceptionDemo
              {
                 public static void main(String[] args){
                 int age=Integer.parseInt(args[0]);
                 if(age>60)
                    {
                         throw new TooYoungException("please wait some more time.... u will get best                                     match");
                   }
               else if(age<18)
                    {
                         throw new TooOldException("u r age already crossed....no chance of getting                                          married");
                     }
              else
                {
                     System.out.println("you will get match details soon by e-mail");
                 }
            }
      }
Output:
1) E:\scjp>java CustomizedExceptionDemo 61
Exception in thread "main" TooYoungException: 
please wait some more time.... u will get best match
at CustomizedExceptionDemo.main(CustomizedExceptionDemo.java:21)
2) E:\scjp>java CustomizedExceptionDemo 27
You will get match details soon by e-mail
3) E:\scjp>java CustomizedExceptionDemo 9
Exception in thread "main" TooOldException: u r age already crossed....no chance of getting
married
 at CustomizedExceptionDemo.main(CustomizedExceptionDemo.java:25)
Note: It is highly recommended to maintain our customized exceptions as unchecked by
extending RuntimeException.
• We can catch any Throwable type including Errors also.
Example: