Binary literal is a Java 7's new feature:
http://docs.oracle.com/javase/7/docs/technotes/guides/language/binary-literals.html

As underscore literals too:
http://docs.oracle.com/javase/7/docs/technotes/guides/language/underscores-literals.html

Unfortunately, Processing's pre-compiler is too dumb to deal w/ them.
The same reason it doesn't accept nested enum types:
http://docs.oracle.com/javase/tutorial/java/javaOO/enum.html

And devs aren't too interested to fix them. Even though it's apparently easy to do so.

As an alternative, you can use a String to store the binary form,
and then use unbinary() to get its int representation.