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ГлавнаяIntellij Idea search and replace regexp

Intellij Idea search and replace regexp

Summary of regular-expression constructs

Construct

Matches

Characters

x

The character x

\\

The backslash character

\0n

The character with octal value 0n (0 <= n <= 7)

\0nn

The character with octal value 0nn (0 <= n <= 7)

\0mnn

The character with octal value 0mnn (0 <= m <= 3, 0 <= n <= 7)

\xhh

The character with hexadecimal value 0xhh

\uhhhh

The character with hexadecimal value 0xhhhh

\t

The tab character ('\u0009')

\n

The newline (line feed) character ('\u000A')

\r

The carriage-return character ('\u000D')

\f

The form-feed character ('\u000C')

\a

The alert (bell) character ('\u0007')

\e

The escape character ('\u001B')

\cx

The control character corresponding to x

 

Character classes

[abc]

a, b, or c (simple class)

[^abc]

Any character except a, b, or c (negation)

[a-zA-Z]

a through z or A through Z, inclusive (range)

[a-d[m-p]]

a through d, or m through p: [a-dm-p] (union)

[a-z&&[def]]

d, e, or f (intersection)

[a-z&&[^bc]]

a through z, except for b and c: [ad-z] (subtraction)

[a-z&&[^m-p]]

a through z, and not m through p: [a-lq-z](subtraction)

 

Predefined character classes

.

Any character (may or may not match line terminators)

\d

A digit: [0-9]

\D

A non-digit: [^0-9]

\s

A whitespace character: [ \t\n\x0B\f\r]

\S

A non-whitespace character: [^\s]

\w

A word character: [a-zA-Z_0-9]

\W

A non-word character: [^\w]

 

POSIX character classes (US-ASCII only)

\p{Lower}

A lower-case alphabetic character: [a-z]

\p{Upper}

An upper-case alphabetic character:[A-Z]

\p{ASCII}

All ASCII:[\x00-\x7F]

\p{Alpha}

An alphabetic character:[\p{Lower}\p{Upper}]

\p{Digit}

A decimal digit: [0-9]

\p{Alnum}

An alphanumeric character:[\p{Alpha}\p{Digit}]

\p{Punct}

Punctuation: One of !"#$%&'()*+,-./:;=>?@[\]^_`{|}~

\p{Graph}

A visible character: [\p{Alnum}\p{Punct}]

\p{Print}

A printable character: [\p{Graph}\x20]

\p{Blank}

A space or a tab: [ \t]

\p{Cntrl}

A control character: [\x00-\x1F\x7F]

\p{XDigit}

A hexadecimal digit: [0-9a-fA-F]

\p{Space}

A whitespace character: [ \t\n\x0B\f\r]

 

java.lang.Character classes (simple java character type)

\p{javaLowerCase}

Equivalent to java.lang.Character.isLowerCase()

\p{javaUpperCase}

Equivalent to java.lang.Character.isUpperCase()

\p{javaWhitespace}

Equivalent to java.lang.Character.isWhitespace()

\p{javaMirrored}

Equivalent to java.lang.Character.isMirrored()

 

Classes for Unicode blocks and categories

\p{InGreek}

A character in the Greek block (simple block)

\p{Lu}

An uppercase letter (simple category)

\p{Sc}

A currency symbol

\P{InGreek}

Any character except one in the Greek block (negation)

[\p{L}&&[^\p{Lu}]] 

Any letter except an uppercase letter (subtraction)

 

Boundary matchers

^

The beginning of a line

$

The end of a line

\b

A word boundary

\B

A non-word boundary

\A

The beginning of the input

\G

The end of the previous match

\Z

The end of the input but for the final terminator, if any

\z

The end of the input

 

Greedy quantifiers

X?

X, once or not at all

X*

X, zero or more times

X+

X, one or more times

X{n}

X, exactly n times

X{n,}

X, at least n times

X{n,m}

X, at least n but not more than m times

 

Reluctant quantifiers

X??

X, once or not at all

X*?

X, zero or more times

X+?

X, one or more times

X{n}?

X, exactly n times

X{n,}?

X, at least n times

X{n,m}?

X, at least n but not more than m times

 

Possessive quantifiers

X?+

X, once or not at all

X*+

X, zero or more times

X++

X, one or more times

X{n}+

X, exactly n times

X{n,}+

X, at least n times

X{n,m}+

X, at least n but not more than m times

 

Logical operators

XY

X followed by Y

X|Y

Either X or Y

(X)

X, as a capturing group

 

Back references

\n

Whatever the nth capturing group matched

 

Quotation

\

Nothing, but quotes the following character

\Q

Nothing, but quotes all characters until \E

\E

Nothing, but ends quoting started by \Q

 

Special constructs (non-capturing)

(?:X)

X, as a non-capturing group

(?idmsux-idmsux) 

Nothing, but turns match flags on - off

(?idmsux-idmsux:X)  

X, as a non-capturing group with the given flags on - off

(?=X)

X, via zero-width positive lookahead

(?!X)

X, via zero-width negative lookahead

(?<=X)

X, via zero-width positive lookbehind

(?<!X)

X, via zero-width negative lookbehind

(?>X)

X, as an independent, non-capturing group

More on Regular Expressions: Full Java Regular Expressions syntax description, Using Regular Expressions in Java.

 

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