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

說明

java.util.regex.Matcher.requireEnd() 方法如果更多輸入可能將正匹配變成負匹配，則返回 true。

宣告

以下是 java.util.regex.Matcher.requireEnd() 方法的宣告。

public boolean requireEnd()

返回值

僅當更多輸入可能將正匹配變成負匹配時返回 True。

示例

以下示例顯示了 java.util.regex.Matcher.requireEnd() 方法的使用方式。

package com.tutorialspoint;

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());    
      }     
   }
}

讓我們編譯並執行上述程式，它將產生以下結果 -

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