.NET Framework 4 introduces a new method on its String class called IsNullOrWhiteSpace that checks whether a provided String is null, empty, or consists only of "white space." This handy method is ...

Even though the introduction of Unicode technically solved this problem, you can still encounter situations in which some or all of your Unicode characters will not display properly in Java programs.

He gives vague warnings about Java's UTF-8 differing from that used in XML and that you have to write other programs specifically with Java compatability in mind when it comes to text.