C#这方面的语法忘记了不过应该也有一个Pattern 类，让后应该也是有个分组group如java中Pattern p = Pattern.compile("(^|\s)a[a-zA-Z]*");Matcher m = p.matcher("this is aa bb cad cc efg acd");while(m.find()){System.out.print(m.group(2));
