java regular expression
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//点号通配符:匹配任意一个字符 System.out.println(Pattern.compile(".ython").matcher("jython").matches()); //中括号存放字符集合:匹配中字符集合中的任意一个字符 Pattern pattern = Pattern.compile("[pj]ython"); System.out.println(pattern.matcher("python").matches()); System.out.println(pattern.matcher("jython").matches()); System.out.println(pattern.matcher("perl").matches()); //管道可选的字符串 System.out.println(Pattern.compile("p(ython|erl)").matcher("perl").matches()); // 花括号{m,n} m-n次;+最少一次;* 可有可无 System.out.println(Pattern.compile("h(t)*p").matcher("hp").matches());
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