PatternSyntaxException using apache poi

Question

I am using Apache POI in two different projects

The first project is a standalone Java application. Everything is fine here.

The second project is an Android

Answer 1

Android is using ICU regex library that is a bit different from Java regex engine.

See this reference:

Unicode scripts, blocks, categories and binary properties are written with the \p and \P constructs as in Perl. \p{prop} matches if the input has the property prop, while \P{prop} does not match if the input has that property.

Thus, the pattern should be written as

Pattern nonAlphabeticPattern = Pattern.compile("\\P{L}");