{"id":268,"date":"2009-03-12T16:07:00","date_gmt":"2009-03-12T16:07:00","guid":{"rendered":"http:\/\/www.tutego.de\/blog\/javainsel\/?p=268"},"modified":"2009-03-12T16:07:00","modified_gmt":"2009-03-12T16:07:00","slug":"java-7-und-named-capturing-group","status":"publish","type":"post","link":"https:\/\/www.tutego.de\/blog\/javainsel\/2009\/03\/java-7-und-named-capturing-group\/","title":{"rendered":"Java 7 und Named Capturing Group"},"content":{"rendered":"

Hatte man bei reguläre Ausdrücken und Gruppen auf die Gruppen über eine Index zugreifen müssen, so kann man dies in Java 7 auch über einen Namen tun; das ganze nennt sich dann named capturing group<\/a>:<\/p>\n

  String pStr = "0x(?<bytes<\/i><\/b>>\\\\p{XDigit}{1,4})\\\\s++u\\\\+(?<char<\/b><\/i>>\\\\p{XDigit}{4})(?:\\\\s++)?";
    Matcher m = Pattern.compile(pStr).matcher(INPUTTEXT);
    if (m.matches()) {
        int bs = Integer.valueOf(m.group("bytes<\/b><\/i>"), 16);
        int c =  Integer.valueOf(m.group("char<\/b><\/i>"), 16);
        System.out.printf("[%x] -> [%04x]%n", bs, c);
    }<\/p>\n

Der Blog-Eintrag http:\/\/blogs.sun.com\/xuemingshen\/entry\/named_capturing_group_in_jdk7<\/a> gibt es in paar mehr Infos.<\/p>\n","protected":false},"excerpt":{"rendered":"

Hatte man bei reguläre Ausdrücken und Gruppen auf die Gruppen über eine Index zugreifen müssen, so kann man dies in Java 7 auch über einen Namen tun; das ganze nennt sich dann named capturing group:   String pStr = "0x(?<bytes>\\\\p{XDigit}{1,4})\\\\s++u\\\\+(?<char>\\\\p{XDigit}{4})(?:\\\\s++)?";     Matcher m = Pattern.compile(pStr).matcher(INPUTTEXT);     if (m.matches()) {         int bs = Integer.valueOf(m.group("bytes"), 16); […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[5],"tags":[],"class_list":["post-268","post","type-post","status-publish","format-standard","hentry","category-java-7"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.tutego.de\/blog\/javainsel\/wp-json\/wp\/v2\/posts\/268","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tutego.de\/blog\/javainsel\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tutego.de\/blog\/javainsel\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tutego.de\/blog\/javainsel\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tutego.de\/blog\/javainsel\/wp-json\/wp\/v2\/comments?post=268"}],"version-history":[{"count":0,"href":"https:\/\/www.tutego.de\/blog\/javainsel\/wp-json\/wp\/v2\/posts\/268\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.tutego.de\/blog\/javainsel\/wp-json\/wp\/v2\/media?parent=268"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tutego.de\/blog\/javainsel\/wp-json\/wp\/v2\/categories?post=268"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tutego.de\/blog\/javainsel\/wp-json\/wp\/v2\/tags?post=268"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}