Unable to Catch exception in java

Question

Scenario:

I am using a project to manage MPT with Java.

I've got a piece of code like:

try {
    originalfilename = m_allFiles[i].getOriginalFileName();
} catch (Exception e)  {
    System.out.println("Exception Caught");
}

As I access the objects from different threads, sometimes this instruction throws an exception like be.derycke.pieter.com.COMException

Problem:

The message "Exception Caught" is never printed and console prints this stack trace:

be.derycke.pieter.com.COMException: Failed to retrieve the properties (0x800700aa)
    at jmtp.PortableDevicePropertiesImplWin32.getValues(Native Method)
    at jmtp.PortableDeviceObjectImplWin32.retrieveStringValue(Unknown Source)
    at jmtp.PortableDeviceObjectImplWin32.getOriginalFileName(Unknown Source)
    at com.servifot.kiosco.MobileCableSearcher$MobileFolderSearcher.run(MobileCableSearcher.java:284)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

The "MobileCableSearcher.java:284" line is what I have inside the try. So why the catch is not catching the exception?

More info:

The object which I call getOriginalFilename() is a PortableDeviceObject

I've tried to Catch a Throwable but the problem is exactly the same.

I've tried to specify the exception with be.derycke.pieter.com.COMException but I get this error:

Can you identify code that print this message? Is it possible that message is printed inside the lib and exception is newer thrown from getOriginalFileName? — talex
– talex, Commented Dec 18, 2018 at 10:26
be.derycke.pieter.com.COMException is a checked exception and thus can't be thrown by PortableDeviceObject.getOriginalFilename() because it doesn't declare that exception to be thrown and implementing methods are not allowed to add a throws declaration. — Thomas
– Thomas, Commented Dec 18, 2018 at 10:27
Unrelated: please learn about java naming conventions. Using "m_" hungarian notation style naming schemes are discouraged for java source code. — GhostCat
– GhostCat, Commented Dec 18, 2018 at 10:29
Check your log. It should contain line "Errror in retrieveStringValue. HRESULT" right before exception. — talex
– talex, Commented Dec 18, 2018 at 10:30
Further to @Thomas comment, if you put a println after the quoted code, is that executed? — Tom Hawtin - tackline
– Tom Hawtin - tackline, Commented Dec 18, 2018 at 10:31

talex · Accepted Answer · 2018-12-18 10:34:26Z

2

Exception is caught and reported in PortableDeviceObjectImplWin32.retrieveStringValue.

You will get null as result of getOriginalFileName in this case.

answered Dec 18, 2018 at 10:34

talex

20.8k3 gold badges34 silver badges71 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Unable to Catch exception in java

Scenario:

Problem:

More info:

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

Scenario:

Problem:

More info:

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related