is checking if a file object exists redudent and bad style when you have a try, catch block?

Is it overly redundant and considered bad style to check that the file object exists before a try catch. Since the FileNotFoundException would be called anyways if the file object did not exist? …

Why RuntimeException is not caught in catch block if there are multiple catch blocks?

I am able to catch RuntimeException or subclass of it with below code: try { //code that throws subclass of RuntimeException throw new ChildRuntimeException(“try”); } catch (…

Send Object Over Java Socket

I have a class name player public JLabel imagen; public String Nombre; public Player(int x, int y, int width, int height, Icon icono, String name){ imagen = Player(x, y, width, height, icono); …

Document created even after NoHostAvailableException

I am trying to execute multiple BatchSatements in parallel with ExecutorService of Java. I want to know whether my query is successfully executed. I have gone through: how do I find out if the update …

Throwing own exceptions

I have this class Account import java.io.IllegalArgumentException; class Account { final int accountNo; final Customer owner; final double overdraft; double …

Program won’t run after a while, and I get this

I have really messed with this one for a while now, and I can’t figure it out. I’m in the process of making an breakout game, but I keep getting this error suddenly: Exception in thread “AWT-…

Serial version uid in abstract exception class

I have a base custom exception class BaseException public class BaseException extends RuntimeException { } and several custom exceptions that extends BaseException public class CustomException …

How to handle UsernameNotFoundException spring security

How to handle UsernameNotFoundException ? In spring security when username not found the UserDetailsService implementation throws a UsernameNotFoundException. For example like this: @Override …

java.lang.ClassNotFoundException: org.glassfish.jersey.internal.RuntimeDelegateImpl , when throwing BadRequestException

I have a handler class in my springbootapp that performs some validation on incoming REST requests and throws BadRequestException back to the controller class. But instead of controller catching the …

Trying to learn Spring: BeanCreationException: Error creating bean with name

Started to learn “Spring in Action” and got a trouble on the very first chapter. I have simple Spring application, built with Maven: pom.xml <project …