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Why does String.valueOf(null) throw a NullPointerException?

...es that in these kind of cases, the most specific overload is chosen: JLS 15.12.2.5 Choosing the Most Specific Method If more than one member method is both accessible and applicable to a method invocation, it is necessary to choose one to provide the descriptor for the run-time method dispatc...
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Why is TypedReference behind the scenes? It's so fast and safe… almost magical!

...support Varargs library as it's not included in the CLI Kernel profile: 4.1.6 Vararg The vararg feature set supports variable-length argument lists and runtime-typed pointers. If omitted: Any attempt to reference a method with the vararg calling convention or the signature encodings associated with...
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What is the difference between Spring's GA, RC and M2 releases?

...g's 3.0 version is now GA release, before that they have launched 3.0 RC1 , RC2 version Also, there was Spring 3.0 M2 version. What's the difference between GA, RC, M versions? ...
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Determine which MySQL configuration file is being used

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Do regular expressions from the re module support word boundaries (\b)?

...gt;>> y = k.search( x) >>> y <_sre.SRE_Match object at 0x100418850> Also forgot to mention, you should be using raw strings in your code >>> x = 'one two three' >>> y = re.search(r"\btwo\b", x) >>> y <_sre.SRE_Match object at 0x100418a58> >...
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Converting array to list in Java

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Get selected option text with JavaScript

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Initializing a static std::map in C++

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How do I list all files of a directory?

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EOFError: end of file reached issue with Net::HTTP

I am using ruby-1.8.7-p302/Rails 2.3.11. I am trying to use FQL (Facebook API) to get stats for a link. Here's my code: 7 A...