public interface ExceptionHandler {
void handle(Exception e);
}
public class MyExceptionHandler implements ExceptionHandler {
@Override
public void handle(Exception e) {
System.out.println("Handling exception: " + e.getMessage());
}
}
public class UserController {
private ExceptionHandler exceptionHandler;
public UserController() {
String handlerClassName = Config.getProperty("exception.handler");
try {
Class<?> handlerClass = Class.forName(handlerClassName);
this.exceptionHandler = (ExceptionHandler) handlerClass.newInstance();
e.printStackTrace();
}
}
@HandleException(type = NullPointerException.class)
public void handleNullPointerException() {
throw new NullPointerException("Null Pointer Exception");
}
public static void main(String[] args) {
UserController controller = new UserController();
controller.handleNullPointerException();
}
}
