Unicode Support in Java SE7: Missing Classes for Unicode Scripting?

I'm trying to grab Arabic text using java regex \\p{IsArabic}

, however the java compiler doesn't seem to recognize it, although the documentation for java SE7 says what it does .

I'm pretty sure I'm using the correct compiler (JDK 1.7). In fact, the compiler does not recognize any of the script classes like \\p{IsLatin}

and \\p{IsGreek}

! Does anyone else have the same problem?