Puzzles: Informative alternatives for Java developers

Reading in my currrent favorate time-beater book when commuting I stumbled across the following:

\u0070\u0075\u0062\u006c\u0069\u0063\u0020\u0020\u0020\u0020
\u0063\u006c\u0061\u0073\u0073\u0020\u0055\u0067\u006c\u0079
\u007b\u0070\u0075\u0062\u006c\u0069\u0063\u0020\u0020\u0020
\u0020\u0020\u0020\u0020\u0073\u0074\u0061\u0074\u0069\u0063
\u0076\u006f\u0069\u0064\u0020\u006d\u0061\u0069\u006e\u0028
\u0053\u0074\u0072\u0069\u006e\u0067\u005b\u005d\u0020\u0020
\u0020\u0020\u0020\u0020\u0061\u0072\u0067\u0073\u0029\u007b
\u0053\u0079\u0073\u0074\u0065\u006d\u002e\u006f\u0075\u0074
\u002e\u0070\u0072\u0069\u006e\u0074\u006c\u006e\u0028\u0020
\u0022\u0048\u0065\u006c\u006c\u006f\u0020\u0077\u0022\u002b
\u0022\u006f\u0072\u006c\u0064\u0022\u0029\u003b\u007d\u007d

Guess what is this?*

Java Puzzles is one of these great book you can read when travelling short distances. It keeps you fit in the language basics and is fun to read. I also like the fact that being an  IT book for once and doesn’t require a computer to work it through. This is from a newer edition of Java Puzzlers Joshua Bloch and Neal Gafters book on traps, pitfalls and corner cases in the Java programming language.

* A Java Hello world in Unicode, due to Java’s native Unicode support this is completely legal.

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