Java 9 Regular Expressions

POSIX character classes

Java also supports many POSIX character classes for matching ASCII text. Here is the list:

POSIX Character Class	Meaning	Character Class
\p{ASCII}	All ASCII characters	[\x00-\x7F]
\p{Digit}	Any digit	[0-9]
\p{Lower}	Lowercase alphabets	[a-z]
\p{Upper}	Uppercase alphabets	[A-Z]
\p{Alpha}	Any alphabet	[\p{Lower}\p{Upper}]
\p{Alnum}	Any alpha-numeric character	[\p{Lower}p{Upper}\p{Digit}]
\p{Punct}	A punctuation character	[!"\#$%&'()*+,-./:;<=>?@\[\\\]^_`{|}~]
\p{Blank}	Space or tab	[ \t]
\p{Space}	A whitespace character	[ \t\n\x0B\f\r]
\p{Graph}	A visible ASCII character	[\p{Alnum}\p{Punct}]
\p{Print}	A printable character	[\p{Graph}\x20]
\p{Cntrl}	A control character	[\x00-\x1F\x7F]
\p{XDigit} ...