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Java Forum / General / April 2007Extract data using regular expression
Hi, If I have a string like "the name JAVA on the disk". or "the name C++ on the disk.." I would like to extract JAVA (or C++ or whichever present) from this string using regular expressions. How can i do it? Thanks, with regards, on ali ... >If I have a string like "the name JAVA on the disk". or "the name C++ >on the disk.." Technically speaking, 'Java' is not an acronym, so it should not be JAVA - unless you are SHOUTING at us, in which case, please don't - we are not deaf. >I would like to extract JAVA (or C++ or whichever present) from this >string using regular expressions. > >How can i do it? What have you tried so far, and in what way(s) did it fail for you? (Note that this is not a help desk.)  SignatureAndrew Thompson http://www.athompson.info/andrew/ > .. > [quoted text clipped - 17 lines] > > Message posted via JavaKB.comhttp://www.javakb.com/Uwe/Forums.aspx/java-general/200704/1 Of course... Well I know of different crude ways of doing this.. but i want a simpler cleaner way... something like this... Pattern pattern = Pattern.compile("the name (.*) on the disk"); Matcher matcher = pattern.matcher(output); while (matcher.find()) { System.out.println("Found a match: " + matcher.group()); System.out.println("Start position: " + matcher.start()); System.out.println("End position: " + matcher.end()); } i remember in javascript we can specify multiple match strings... by either putting square brackets.. etc. > i remember in javascript we can specify multiple match strings... by > either putting square brackets.. etc. The word "I" is always capitalized in English. The ellipsis is used to indicate missing, omitted or elided text. Have you read <http://java.sun.com/javase/6/docs/api/java/util/regex/Pattern.html> ? SignatureLew > > i remember in javascript we can specify multiple match strings... by > > either putting square brackets.. etc. [quoted text clipped - 9 lines] > -- > Lew If I do the same thing with Javascript, i will have to do it in the following manner. /The name is (,*) on the disk/,exec("The name is Java on the disk") This would return an array containing the following two strings - The name is Java on the disk - Java I am interested in the second string. Is there a similar way of doing this with Java > > i remember in javascript we can specify multiple match strings... by > > either putting square brackets.. etc. [quoted text clipped - 9 lines] > -- > Lew If I do the same thing with Javascript, i will have to do it in the following manner. /The name is (,*) on the disk/,exec("The name is Java on the disk") This would return an array containing the following two strings - The name is Java on the disk - Java I am interested in the second string. Is there a similar way of doing this with Java Do something like below what you were trying: Pattern.compile(".*The\\s+name\\s+is\\s+(\\w+)\\s+on\\s+the\\s +disk.*"); Also see http://java.sun.com/developer/technicalArticles/releases/1.4regex/ Sunny > > > i remember in javascript we can specify multiple match strings... by > > > either putting square brackets.. etc. [quoted text clipped - 22 lines] > > Is there a similar way of doing this with Java Use matcher.group(1) to capture Java or C++ words. Cheers > Do something like below what you were trying: > Pattern.compile(".*The\\s+name\\s+is\\s+(\\w+)\\s+on\\s+the\\s [quoted text clipped - 30 lines] > > > Is there a similar way of doing this with Java > Use matcher.group(1) to capture Java or C++ words. > >> > Do something like below what you were trying: >> > Pattern.compile(".*The\\s+name\\s+is\\s+(\\w+)\\s+on\\s+the\\s >> > +disk.*"); A: Because it confuses the reader. Q: Why is it bad? A: Placing the response above the quoted material instead of inline. Q: What is top-posting? SignatureLew > Well I know of different crude ways of doing this.. but i want a > simpler cleaner way... [quoted text clipped - 3 lines] > Pattern pattern = Pattern.compile("the name > (.*) on the disk"); .* is greedy. Beware of performance issues, and consider lazy quantifier for this example, or even better, use class, or just C++|Java... SignatureGreatest sh.ts: http://www.net.hr/vijesti/page/2007/03/30/0030006.html >> .. >> [quoted text clipped - 35 lines] > i remember in javascript we can specify multiple match strings... by > either putting square brackets.. etc. Quick & Dirty: s.replaceAll("the name (\\S+) on the disk", "$1"); Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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