I'm not sure what's unclear in "any character except a, b, or c" or "any
character except one in the Greek block".
A line terminator is neither 'a' nor 'b' nor 'c', nor is it in the Greek
block.
Your example works the same in JDK 8, 11, 17, 21, 22, with or without
the additional MULTILINE or DOTALL flags.
(BTW, if you look carefully, the example in the Stack Overflow
discussion you are referring to builds a matcher over a string that does
_not_ contain any line terminator.)
As documented (and implied by the name), DOTALL refers to the pattern "."
Similarly, MULTILINE refers to the "^" and "$" boundary matchers.
If you feel the doc is incorrect, you might consider filing a bug report
https://bugs.java.com/bugdatabase/
On 2024-08-11 11:42, Olivier Cailloux wrote:
Dear list,
The Pattern Javadoc <https://docs.oracle.com/en/java/javase/22/docs/api/
java.base/java/util/regex/Pattern.html> does not specify whether “Any
character” includes line terminators in “Any character except |a|, |b|,
or |c| (negation)” ([^abc]) or “Any character except one in the Greek
block (negation)” (\P{InGreek}), or whether it depends on DOTALL or
MULTILINE being set.
As a result, it seems to me impossible from the doc to deduce, for
example, whether the Pattern "[^a]" will match a line terminator
(spoiler alert: it does <https://onecompiler.com/java/42nuaa4bd>). This
discussion <https://stackoverflow.com/questions/64383917/> illustrates
the confusion.
Would an addition to the doc be considered?
