class InvalidAgeException extends Exception{ InvalidAgeException(String s){ super(s); } public String toString() { return "Candidate is less than 18 year is not allowed to vote."; } }
class ValidateCandidate{ static void validate(int age) throws InvalidAgeException{ if(age < 18) throw new InvalidAgeException("invalid candidate"); else System.out.println("welcome to vote"); } public static void main(String args[]){ try{ validate(13); }catch(Exception ex){ System.out.println("Exception occured: "+ex); } System.out.println("rest of the code..."); } }
output here:
Points to Remember
- Extend the Exception class to create your own exception class.
- You don’t have to implement anything inside it, no methods are required.
- You can have a Constructor if you want.
- You can override the toString() function, to display customized message.