{"id":167510,"date":"2017-04-14T03:29:00","date_gmt":"2017-04-13T19:29:00","guid":{"rendered":"http:\/\/itteacheritfreelance.hk\/test\/wordpress\/?guid=fee2d21e45d5f9160382fd57b68ec67d"},"modified":"2017-04-14T03:29:00","modified_gmt":"2017-04-13T19:29:00","slug":"regular-expressions-in-java-part-1-pattern-matching-and-the-pattern-class","status":"publish","type":"post","link":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/2017\/04\/14\/regular-expressions-in-java-part-1-pattern-matching-and-the-pattern-class\/","title":{"rendered":"Regular expressions in Java, Part 1: Pattern matching and the Pattern class"},"content":{"rendered":"
\n
\n

Java’s character and assorted string class<\/a>es offer low-level support for pattern matching, but that support typically leads to complex code. For simpler and more efficient coding, Java offers the Regex API. This two-part tutorial helps you get started with regular expressions and the Regex API. First we’ll unpack the three powerful class<\/a>es residing in the java.util.regex<\/code> package, then we’ll explore the Pattern<\/code> class<\/a> and its sophisticated pattern-matching constructs.<\/p>\n

download<\/span> <\/a><\/p>\n
Download the source<\/a><\/div>\n
Get the complete source code for this article’s demo application. Created by Jeff Friesen for JavaWorld.<\/span><\/div>\n<\/div>\n

What are regular expressions?<\/h2>\n

A regular expression<\/em>, also known as a regex<\/em> or regexp<\/em>, is a string whose pattern<\/em> (template) describes a set of strings. The pattern determines which strings belong to the set. A pattern consists of literal characters and metacharacters<\/em>, which are characters that have special meaning instead of a literal meaning.<\/p>\n

To read this article in full, please click here<\/a><\/p>\n<\/section>\n<\/article>\n","protected":false},"excerpt":{"rendered":"

Java’s character and assorted string classes offer low-level support for pattern matching, but that support typically leads to complex code. For simpler and more efficient coding, Java offers the Regex API. This two-part tutorial helps you get start… \u95b1\u8b80\u5168\u6587 →<\/span><\/a><\/p>\n","protected":false},"author":123,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"slim_seo":[],"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[12,2,315,240],"tags":[398,402,397,414,413,528,410,409,407,408,406,399,400,394,318,526,375,523,183,184,529,524,232,10,401,396,381,403,412,411,395,405,404,525,457,530,363,384,321,320,319,316,26,527,317],"jetpack_publicize_connections":[],"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p7prtj-HzM","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/posts\/167510"}],"collection":[{"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/users\/123"}],"replies":[{"embeddable":true,"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/comments?post=167510"}],"version-history":[{"count":2,"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/posts\/167510\/revisions"}],"predecessor-version":[{"id":169942,"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/posts\/167510\/revisions\/169942"}],"wp:attachment":[{"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/media?parent=167510"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/categories?post=167510"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/tags?post=167510"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}