Reluctant Quantifier [X ??] 匹配存在一次或根本不存在的X。
X?? - 示例
以下示例显示了用法。
package com.learnfk; import java.util.regex.Matcher; import java.util.regex.Pattern; public class ReluctantQuantifierDemo { private static final String REGEX = "T??"; private static final String INPUT = "abcdTatW"; public static void main(String[] args) { //创建一个模式 Pattern pattern = Pattern.compile(REGEX); //获取匹配对象 Matcher matcher = pattern.matcher(INPUT); while(matcher.find()) { //打印匹配的起始索引。 System.out.println("Match String start(): "+matcher.start()); } } }
让无涯教程编译并运行以上程序,这将产生以下输出-
Match String start(): 0 Match String start(): 1 Match String start(): 2 Match String start(): 3 Match String start(): 4 Match String start(): 5 Match String start(): 6 Match String start(): 7 Match String start(): 8
参考链接
https://www.learnfk.com/javaregex/javaregex-reluctant-once.html
标签:Java,String,matcher,无涯,start,正则,static,Pattern,Match From: https://blog.51cto.com/u_14033984/9073652