Why catching throwable is bad?

Why catching throwable is bad?

Throwable is a bad idea because in order to catch them you have to declare at your method signature e.g. public void doSomething() throws Throwable. When you do this, nobody knows what kind of Error this method is going to throw, and until you know what is the problem, how can you resolve that.

Is it a bad practice to catch throwable?

Don’t Catch Throwable Throwable is the superclass of all exceptions and errors. You can use it in a catch clause, but you should never do it! If you use Throwable in a catch clause, it will not only catch all exceptions; it will also catch all errors.

Why is it bad to catch exception Java?

catch(Exception) is a bad practice because it catches all RuntimeException (unchecked exception) too. This may be java specific: Sometimes you will need to call methods that throw checked exceptions. If this is in your EJB / business logic layer you have 2 choices – catch them or re-throw them.

Is it a good practice to catch a RuntimeException Java?

RuntimeException is intended to be used for programmer errors. As such it should never be caught.

Should you catch all throwable objects in Java?

Catching Throwable is sometimes necessary if you are using libraries that throw Errors over-enthusiastically, otherwise your library may kill your application. However, it would be best under these circumstances to specify only the specific errors thrown by the library, rather than all Throwables.

Can we catch errors in Java?

Catching Errors Error class in Java doesn’t inherit from java. Exception, we must declare the Error base class – or the specific Error subclass we’d like to capture – in the catch statement in order to catch it.

What is throwable exception in Java?

The Throwable class is the superclass of all errors and exceptions in the Java language. Only objects that are instances of this class (or one of its subclasses) are thrown by the Java Virtual Machine or can be thrown by the Java throw statement.

Are exceptions throwable?

The Exception class Exception inherits Throwable ‘s methods; it declares no new methods. Java provides many exception classes that directly subclass Exception .

Can we throw throwable in Java?

You should not throw Throwable . Here’s why. Throwable is the top of the hierarchy of things that can be thrown and is made up of Exceptions and Errors . Since Errors by definition arise from unsalvagable conditions, it is pointless to include them in your method declaration.

Should I throw exception or RuntimeException?

Do not throw RuntimeException, Exception, or Throwable. Moreover, throwing a RuntimeException can lead to subtle errors; for example, a caller cannot examine the exception to determine why it was thrown and consequently cannot attempt recovery.

Why it is not a good practice to catch exception in method level?

Specifying an Exception or Throwable makes it almost impossible to handle them properly when calling your method. The only information the caller of your method gets is that something might go wrong.

Should I catch exceptions?

You should catch the exception when you are in the method that knows what to do. For example, forget about how it actually works for the moment, let’s say you are writing a library for opening and reading files. Here, the programmer knows what to do, so they catch the exception and handle it.