A further discussion of Java String.Split ()

<span style= "FONT-SIZE:18PX;" >import java.util.*;p ublic class sixty{public static void Main (string[] args) {String s = "sur,h                S DG,FDG, D, FD, D,d,dasg,ds ";                string[] t = S.split (", \\s*");                System.out.println (s);                for (int i =0; i < t.length; i++) {System.out.println (t[i]);                } System.out.println (T.length);                String S1 = "Sur, #hs #dg,fdg, d# D, f#d, D,d,dasg,ds";                string[] T1 = S1.split (", #");                System.out.println (S1);                for (int i =0; i < t1.length; i++) {System.out.println (t1[i]);                } System.out.println (T1.length);                String s2 = "Sur, #hs #dg,fdg, d# D, f#d, D,d,dasg,ds";                string[] t2 = S2.split ("[, #]");                SYSTEM.OUT.PRINTLN (S2); for (int i =0; i < t2.length; i++) {System.out.priNtln (T2[i]);        } System.out.println (T2.length);                                                                                                                                                              }}~ ~ </span>

Output Result:

1, Sur,hs DG,FDG, D, FD, D,d,dasg,ds
SUR:HS dg:fdg:d: Fd:d:d:dasg:ds:9

2, Sur, #hs #dg,fdg, d# D, f#d, D,d,dasg,ds
SUR:HS#DG,FDG, d# D, f#d, D,d,dasg,ds:2

3, Sur, #hs #dg,fdg, d# D, f#d, D,d,dasg,ds
SUR::HS:DG:FDG:D: D:f:d:d:d:dasg:ds:13

The first is to make it clear that split and repalceall,matches support regular expressions

string[] t = S.split (", \\s*");

Split with a comma or comma plus a blank character

string[] T1 = S1.split (", #");

Comma plus # as the separator

string[] t2 = S2.split ("[, #]");

Use commas or # as whitespace characters

Regular expressions

Metacharacters	Describe
\	Marks the next character as a special character, or a literal character, or a backward reference, or an octal escape. For example, "\\n" matches \ n. "\ n" matches the line break. The sequence "\ \" matches "\" and "\ (" Matches "(".
^	Matches the starting position of the input string. If the multiline property of the RegExp object is set, ^ also matches the position after "\ n" or "\ r".
$	Matches the end position of the input string. If the multiline property of the RegExp object is set, $ also matches the position before "\ n" or "\ r".
*	Matches the preceding sub-expression 0 or more times (greater than or equal to 0 times). For example, zo* can match "Z", "Zo" and "Zoo". * Equivalent to {0,}.
+	Matches the preceding subexpression one or more times (greater than or equal to 1 times). For example, "zo+" can Match "Zo" and "Zoo", but not "Z". + equivalent to {1,}.
?	Matches the preceding subexpression 0 or one time. For example, "Do (es)?" You can match "do" in "do" or "does".?
N	N is a non-negative integer. Matches the determined n times. For example, "o{2}" cannot match "O" in "Bob", but can match two o in "food".
{N,}	N is a non-negative integer. Match at least n times. For example, "o{2,}" cannot match "O" in "Bob", but can match all o in "Foooood". "O{1,}" is equivalent to "o+". "O{0,}" is equivalent to "o*".
{N,m}	Both M and n are non-negative integers, where n<=m. Matches at least n times and matches up to M times. For example, "o{1,3}" will match the first three o in "Fooooood". "o{0,1}" is equivalent to "O?". Note that there can be no spaces between a comma and two numbers.
?	When the character immediately follows any other restriction (*,+,?,{n},{n,},{n,m}), the matching pattern is non-greedy. The non-greedy pattern matches the searched string as little as possible, while the default greedy pattern matches as many of the searched strings as possible. For example, for the string "Oooo", "o+?" A single "O" will be matched, and "o+" will match all "O".
. Point	Matches any single character except for "\ r \ n". To match any character that includes "\ r \ n", use a pattern like "[\s\s]".
(pattern)	Match pattern and get this match. The obtained matches can be obtained from the resulting matches collection, the Submatches collection is used in VBScript, and the $0...$9 property is used in JScript. To match the parentheses character, use "\ (" or "\").

X|y	Match x or Y. For example, "Z|food" can match "Z" or "food". "(z|f) Ood" matches "Zood" or "food".
[XYZ]	The character set is combined. Matches any one of the characters contained. For example, "[ABC]" can Match "a" in "plain".
[^XYZ]	Negative character set. Matches any character that is not contained. For example, "[^ABC]" can match "Plin" in "plain".
[A-z]	The character range. Matches any character within the specified range. For example, "[A-z]" can match any lowercase alphabetic character in the range "a" to "Z". Note: The range of characters can only be represented when a hyphen is inside a character group and occurs between two characters, or only the hyphen itself if the beginning of the character group.
[^a-z]	A negative character range. Matches any character that is not in the specified range. For example, "[^a-z]" can match any character that is not in the range "a" to "Z".
\b	Matches a word boundary, which is the position between a word and a space. For example, "er\b" can Match "er" in "never", but cannot match "er" in "verb".
\b	Matches a non-word boundary. "er\b" can Match "er" in "verb", but cannot match "er" in "Never".
\cx	Matches the control character indicated by X. For example, \cm matches a control-m or carriage return. The value of x must be one of a-Z or a-Z. Otherwise, c is considered to be a literal "C" character.
\d	Matches a numeric character. equivalent to [0-9].
\d	Matches a non-numeric character. equivalent to [^0-9].
\f	Matches a page break. Equivalent to \x0c and \CL.
\ n	Matches a line break. Equivalent to \x0a and \CJ.
\ r	Matches a carriage return character. Equivalent to \x0d and \cm.
\s	Matches any whitespace character, including spaces, tabs, page breaks, and so on. equivalent to [\f\n\r\t\v].
\s	Matches any non-whitespace character. equivalent to [^ \f\n\r\t\v].
\ t	Matches a tab character. Equivalent to \x09 and \ci.
\v	Matches a vertical tab. Equivalent to \x0b and \ck.
\w	Matches any word character that includes an underscore. Similar but not equivalent to "[a-za-z0-9_]", where the "word" character uses the Unicode character set.
\w	Matches any non-word character. Equivalent to "[^a-za-z0-9_]".

\xn	Match N, where n is the hexadecimal escape value. The hexadecimal escape value must be two digits long for a determination. For example, "\x41" matches "A". "\x041" is equivalent to "\x04&1". ASCII encoding can be used in regular expressions.
\num	Matches num, where num is a positive integer. A reference to the obtained match. For example, "(.) \1 "matches two consecutive identical characters.
\ n	Identifies an octal escape value or a backward reference. n is a backward reference if \ n is preceded by at least one of the sub-expressions obtained. Otherwise, if n is the octal number (0-7), N is an octal escape value.
\nm	Identifies an octal escape value or a backward reference. If at least NM has obtained a subexpression before \nm, then NM is a backward reference. If there are at least N fetches before \nm, then n is a backward reference followed by the literal m. If none of the preceding conditions are met, if both N and M are octal digits (0-7), then \nm will match the octal escape value nm.
\nml	If n is an octal number (0-7) and both M and L are octal digits (0-7), the octal escape value NML is matched.
\un	Match N, where N is a Unicode character represented by four hexadecimal digits. For example, \u00a9 matches the copyright symbol (©).
\< \>	The start (\<) and End (\>) of the matching word (word). For example, the regular expression \<the\> can match "the" in the string "for the wise", but cannot match "the" in the string "otherwise". Note: This meta-character is not supported by all software.
\( \)	The expression between \ (and \) is defined as group, and the character that matches the expression is saved to a staging area (up to 9 in a regular expression), which can be referenced by a \1 to \9 symbol.
|	Perform a logical or (or) operation on the two matching criteria. For example, the regular expression (Him|her) matches "It belongs to him" and "it belongs to her", but does not match "it belongs to them." Note: This meta-character is not supported by all software.
+	Match 1 or more of that character just before it. For example, the regular expression + + matches 9, 99, 999, and so on. Note: This meta-character is not supported by all software.
?	Match 0 or 1 of that character just before it. Note: This meta-character is not supported by all software.
{i} {i,j}	Matches the specified number of characters, which are defined in the expression preceding it. For example, the regular expression a[0-9]{3} can match the character "A" followed by a string of exactly 3 numeric characters, such as A123, A348, etc., but does not match A1234. A regular expression [0-9]{4,6} matches any 4, 5, or 6 consecutive digits

A further discussion of Java String.Split ()