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I am wondering what this line of code does to a url that is contained in a String called surl?
String[] stokens = surl.split("\\s*,\\s*"); Lets pretend this is the surl = "http://myipaddress:8080/Map/MapServer.html" What will stokens be?
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The regular expression \s is a predefined character class. It indicates a single whitespace character. Let's review the set of whitespace characters: [ \t\n\x0B\f\r] The plus sign + is a greedy quantifier, which means one or more times.
\\s+ - matches sequence of one or more whitespace characters.
\\s is a regular expression in Java used for white space characters. Regular expressions are the sequence of characters used to develop a pattern for data. We use patterns sometimes when we search data in the text, and \\s is used in those patterns when space is required.
\\s+ --> replaces 1 or more spaces. \\\\s+ --> replaces the literal \ followed by s one or more times.
That regex "\\s*,\\s*" means:
\s* any number of whitespace characters\s* any number of whitespace characterswhich will split on commas and consume any spaces either side
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\s stands for "whitespace character".[ \t\n\x0B\f\r]. That is: \s matches a space( ) or a tab(\t) or a line(\n) break or a vertical tab(\x0B sometimes referred as \v) or a form feed(\f) or a carriage return(\r) .\\s*,\\s* It says zero or more occurrence of whitespace characters, followed by a comma and then followed by zero or more occurrence of whitespace characters.
These are called short hand expressions.
You can find similar regex in this site: http://www.regular-expressions.info/shorthand.html
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