Java正則Reluctant量詞[X{n,m}?]匹配

Reluctant量詞[X{n,m}?]匹配存在至少n但不多於m次的X。

範例
以下範例顯示了Reluctant量詞的用法。

package com.yiibai;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class ReluctantQuantifierDemo {
   private static final String REGEX = "T{2,3}?";
   private static final String INPUT = "abcdTatTTfgfgTTTtrtetTTTTW";

   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());
      }
   }
}

編譯並執行上面的程式，這將產生以下結果 -

Match String start(): 7
Match String start(): 13
Match String start(): 21
Match String start(): 23