勉强量词 [X{n}?] 匹配
描述
勉强量词 [X{n}?] 匹配 X 恰好出现 n 次。
示例
下面的例子展示了勉强量词的用法。
package com.tutorialspoint; import java.util.regex.Matcher; import java.util.regex.Pattern; public class ReluctantQuantifierDemo { private static final String REGEX = "T{2}?"; private static final String INPUT = "abcdTatTTWTTT"; public static void main(String[] args) { // create a pattern Pattern pattern = Pattern.compile(REGEX); // get a matcher object Matcher matcher = pattern.matcher(INPUT); while(matcher.find()) { //Prints the start index of the match. System.out.println("Match String start(): "+matcher.start()); } } }
让我们编译并运行上面的程序,这将产生以下结果 −
Match String start(): 7 Match String start(): 10