User defined exception:
Java allows us to write own exception class for our project, we all know that all exceptions are subclasses of Exception.
Writing custom unchecked Exception
To create a unchecked exception, make your exception call to be a subclass of RuntimeException.
Example
public class UserException extends RuntimeException {
public UserException() {
// TODO Auto-generated constructor stub
super("User Exception Invaild User");
}
}
You can write your own condition when this exception should occur
public class UserProcess {
voidregister(String name)
{
if (....) // verify the user and throw custom Exception
{
thrownewUserException();
}
}
}Writing custom checked Exception
To create a unchecked exception, make your exception call to be a subclass of Exception
Example
public class UserException extends Exception {
public UserException() {
// TODO Auto-generated constructor stub
super("User Exception Invaild User");
}
}
public class UserProcess {
voidregister(String name)
{
if (....) // verify the user and throw custom Exception
{
thrownewUserException();
}
}
}