Contents
Why should the other subclasses of exception be checked?
Having checked exception allows a reader of the code to figure out quickly that this piece of code needs special attention and enforcing their handling at compile time reducing the runtime bugs. We can throw any kind of exception, checked or unchecked.
Can a subclass throw an exception?
Subclass method cannot throw the exception which is a superclass of the superclass method’s exception. Subclass method can throw any unchecked or runtime exception.
Can you throw two exceptions?
You can also throw a nested Exception, which contains inside another one exception object. But that would hardly count that as “throwing two exceptions”, it just represents a single exception case described by two exceptions objects (frequently from different layers). You can’t throw two exceptions.
Why overridden method Cannot throw checked exception?
The rules are there so you don’t lose the original throws declaration by widening the specificity, as the polymorphism means you can invoke the overriden method on the superclass. The overriding method must NOT throw checked exceptions that are new or broader than those declared by the overridden method.
How do you throw an exception can you throw multiple exceptions in one throw statement?
If your code throws more than one exception, you can choose if you want to:
- use a separate try block for each statement that could throw an exception or.
- use one try block for multiple statements that might throw multiple exceptions.
Is it possible to throw an exception in Java?
This is because in Java every method can throw a RuntimeException (or an Error) at any time. It does not even need to be declared in the throws part of your method signature. So it is possible to also throw a exception which is a super type of the one declared in your overridden method, as long it is still a sub type of RuntimeException.
Can a subclass throw the same exception as a superclass?
What I have known till now is that a subclass if overriding a superclass method should throw the same exception or a subclass of the exception.
Can a RuntimeException be declared in a subclass method?
That means, the explicit RuntimeException declaration on the subclass method is a subclass of an existing (implied) exception on the superclass method, so it’s allowed. If super class method does not declare any exception, then sub class overridden method cannot declare “checked” exception but it can declare “unchecked” exceptions
When to use unchecked and checked exceptions in Java?
The Kinds of Exceptions which defines checked (needs to be specified in throws clause) and unchecked (does not need to be specified in throws clause) exceptions. When you override a method, you should define the same checked exceptions.