The method System.console()
can return null if there is no console device present. This
comes as a surprise to people when they run
their code in an IDE. This post is about overcoming such problems.
Content is not allowed in prolog is an error generally
emitted by the Java XML parsers when data is encountered before the <?xml...
declaration. You may inspect the document in a text editor and think
nothing is wrong, but you need to go down to the byte level to understand
the problem. You probably have a character encoding bug.
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