suppressedException semantics (original) (raw)

David Holmes David.Holmes at oracle.com
Wed Aug 25 03:58:16 PDT 2010

Gernot Neppert said the following on 08/24/10 22:29:

Well I disagree that the exception in the try block is necessarily more important than the one in the finally block. It might not be more important, but it might be the only one that you can spot by looking at the code:

I was referring to try-finally, not try-with.

try(Reader reader = new FileReader("contents.txt")) { char[] buf = new char[1000]; int read; while(0 < (read = reader.read(buf))) { // Do something } }

Wouldn't you want the above block to re-throw exceptions from the constructor or from 'read', rather than from an 'invisible' exception source?

This really is an argument against hiding the code in the first place. When you read the above you have to implicitly "see" the hidden close that might also throw an exception.

Regardless of which exception is thrown you will want/need to follow the chain to get the full picture of what has gone wrong.

David Holmes

(See also my other post suggesting that the compiler might be more helpful in pointing at 'hidden' exception sources)

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