Matching arabic text with regex

Question

I'm trying to match only arabic text using regex but I'm getting an exception. Here's my code:

txt.matches("\\P{Arabic}+")

Here's the exception:

Exception in thread "main" java.util.regex.PatternSyntaxException: Unknown character property name {Arabic} near index 9 \P{Arabic}+

Answer 1

Use this character block

\p{InArabic}+

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In java Unicode scripts, blocks, categories and binary properties are written with the \p and \P(negated effect)

• Scripts are specified either with the prefix Is or by using the script keyword(supported scripts)
• Blocks are specified with the prefix In or by using the keyword block(supported blocks)
• Categories may be specified with the optional prefix Is or using keyword general_category or gc(supported categories)
• Binary properties are specified with the prefix Is (supported properties)

REFERECE