java.util.regex.Matcher.requireEnd()方法

如果更多輸入可以將正匹配更改為負匹配，則java.util.regex.Matcher.requireEnd()方法返回true。

聲明

以下是java.util.regex.Matcher.requireEnd()方法的聲明。

public boolean requireEnd()

返回值

當且僅當更多輸入可以將正匹配轉換為負匹配時才為真。

示例

以下示例顯示了java.util.regex.Matcher.requireEnd()方法的用法。

package com.zaixian;

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

public class MatcherDemo {
   private static String REGEX = "(a*b)(foo)";
   private static String INPUT = "aabfooaabfooabfoob";
   private static String REPLACE = "-";

   public static void main(String[] args) {
      Pattern pattern = Pattern.compile(REGEX);

      // get a matcher object
      Matcher matcher = pattern.matcher(INPUT);

      while(matcher.find()) {
         //Prints the offset after the last character matched.
         System.out.println("First Capturing Group, (a*b) Match String end(): "+matcher.end());
         System.out.println("requireEnd(): "+matcher.requireEnd());
      }
   }
}

編譯並運行上面的程式，這將產生以下結果 -

First Capturing Group, (a*b) Match String end(): 6
requireEnd(): false
First Capturing Group, (a*b) Match String end(): 12
requireEnd(): false
First Capturing Group, (a*b) Match String end(): 17
requireEnd(): false