How to match any character in regular expression

Question

The following should be matched   AAA123 ABCDEFGH123 XXXX123   can I do     123

User · Answer

I work this Not always dot is means any char  Exception when single line mode   p all  should be   String value          lt  gt        amp               -            String expression     a-zA-Z0-9  p all   0 50    if value matches expression        System out println  true      else       System out println  false

User · Answer

No    will match zero-or-more characters  You should use    which matches one-or-more instead   This expression might work better for you   A-Z  123

User · Answer

There are lots of sophisticated regex testing and development tools  but if you just want a simple test harness in Java  here s one for you to play with       String   tests              AAA123            ABCDEFGH123            XXXX123            XYZ123ABC            123123            X123            123              for  String test   tests            System out println test        test matches    123             Now you can easily add new testcases and try new patterns  Have fun exploring regex   See also   regular-expressions info Tutorial

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The most common way I have seen to encode this is with a character class whose members form a partition of the set of all possible characters   Usually people write that as   s S   whitespace or non-whitespace   though   w W     d D   etc  would all work

User · Answer

Yes that will work  though note that   will not match newlines unless you pass the DOTALL flag when compiling the expression   Pattern pattern   Pattern compile    123   Pattern DOTALL   Matcher matcher   pattern matcher inputStr   boolean matchFound   matcher matches

User · Answer

Specific Solution to the example problem -  Try  A-Z  123  will match 123  AAA123  ASDFRRF123  In case you need at least a character before 123 use  A-Z  123    General Solution to the question  How to match  any character  in the regular expression     If you are looking for anything including whitespace you can try   w  W  min char to match    If you are trying to match anything except whitespace you can try   S  min char to match

User · Answer

Try the regex   3    This will match all characters except a new line

User · Answer

should match any character  including newline    CHARS  matches all characters except for those in CHARS  If CHARS is empty  it matches all characters   JavaScript example    a    Z  test  abcxyz  0 r n t012789ABCXYZ      Returns    true

User · Answer

Use the pattern   to match any character once     to match any character zero or more times      to match any character one or more times

User · Answer

and    are for any chars except for new lines     Double Escaping  Just in case  you would wanted to include new lines  the following expressions might also work for those languages that double escaping is required such as Java or C        s  S      d  D      w  W     for zero or more times  or      s  S      d  D      w  W     for one or more times   Single Escaping   Double escaping is not required for some languages such as  C   PHP  Ruby  PERL  Python  JavaScript     s S     d D     w W     s S     d D     w W     Test  import java util regex Matcher  import java util regex Pattern    public class RegularExpression       public static void main String   args            final String regex 1       s  S             final String regex 2       d  D             final String regex 3       w  W             final String string    AAA123 n t                  ABCDEFGH123 n t                  XXXX123 n t            final Pattern pattern 1   Pattern compile regex 1           final Pattern pattern 2   Pattern compile regex 2           final Pattern pattern 3   Pattern compile regex 3            final Matcher matcher 1   pattern 1 matcher string           final Matcher matcher 2   pattern 2 matcher string           final Matcher matcher 3   pattern 3 matcher string            if  matcher 1 find                  System out println  Full Match for Expression 1      matcher 1 group 0                       if  matcher 2 find                  System out println  Full Match for Expression 2      matcher 2 group 0                      if  matcher 3 find                  System out println  Full Match for Expression 3      matcher 3 group 0                        Output  Full Match for Expression 1  AAA123     ABCDEFGH123     XXXX123  Full Match for Expression 2  AAA123     ABCDEFGH123     XXXX123  Full Match for Expression 3  AAA123     ABCDEFGH123     XXXX123     If you wish to explore the expression  it s been explained on the top right panel of regex101 com  If you d like  you can also watch in this link  how it would match against some sample inputs     RegEx Circuit  jex im visualizes regular expressions

User · Answer

Yes  you can  That should work       any char except newline      the actual dot character        0 1    match any char except newline zero or one times        0     match any char except newline zero or more times        1     match any char except newline one or more times

[java] How to match "any character" in regular expression?

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