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

如果更多输入可以将正匹配更改为负匹配，则java.util.regex.Matcher.requireEnd()方法返回true。

声明

以下是java.util.regex.Matcher.requireEnd()方法的声明。

public boolean requireEnd()

返回值

当且仅当更多输入可以将正匹配转换为负匹配时才为真。

示例

以下示例显示了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());    
      }     
   }
}

编译并运行上面的程序，这将产生以下结果 -

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