About Question enthuware.ocpjp.v7.2.1273 :

[ETS User]

"If an exception is thrown within the try-with-resources block, then that is the exception that the caller gets"

Should the answer is java.lang.IOException?

[admin]

In the try block inside the main method, new Exception("test") is being thrown. So why do you think IOException should be the right answer?

[Guest]

So if the code inside try-with-resource throws an exception, the program still runs the code after try-with-resource?

[admin]

I am really not sure what you are getting at. The question asks what is the exception thrown out of the main method. So Exception (not IOException) is the right answer. You may also run the code and verify.
-Paul.

[Guest]

Sorry, Here is what i meant:

public static void main(String[] args) throws Exception {        
 try(Device d = new Device()){  --> an IO exception is thrown here          
 throw new Exception("test");  --> should this code be run?
}     
}

[admin]

Sorry, Here is what i meant:

public static void main(String[] args) throws Exception {        
 try(Device d = new Device()){  --> an IO exception is thrown here          
 throw new Exception("test");  --> should this code be run?
}     
}

The given code does not throw any exception in constructor of Device. In fact, the given code does not have any constructor for Device class. So  Device d = new Device() doesn't throw any exception.

HTH,
Paul.

[Guest]

Oh, thanks Paul. I got it now. I should read the question more carefully.

[EpicWestern]

OP assumed that try-with-resources calls the open() method automatically, which it doesn't.

[jowfornari]

Since Device is implementing AutoCloseable, the method close shouldn't declare that it throws an Exception?

[admin]

No, why do you think so?

[jowfornari]

Forget that, I was wrong.

About close() method on AutoCloseable:
"While this interface method is declared to throw Exception, implementers are strongly encouraged to declare concrete implementations of the close method to throw more specific exceptions, or to throw no exception at all if the close operation cannot fail."

[codecodecode67]

Can you clarify why AutoCloseable is not imported explicitly -> import java.lang.AutoCloseable ?

I wrote some test code out and if I implement Closeable it does not compile unless I import java.io.Closeable but if I implement AutoCloseable, it compiles without the need to import java.lang.AutoCloseable...

Similarly, AutoCloseable is not imported in this question which lead me to think that it won't compile but apparently that's not a problem...Why?

Thank you

[admin]

Why do you think any class in java.lang package needs to be imported explicitly? Do you explicitly import java.lang.String? This is OCAJP stuff
-Paul.

[codecodecode67]

yeah makes more sense now hahaha....I never actually thought about it