Java java.util.regex.Matcher.reset()用法及代碼示例

描述

這個java.util.regex.Matcher.reset()方法重置此匹配器。

聲明

以下是聲明java.util.regex.Matcher.reset()方法。

public Matcher reset()

返回值

這個匹配器。

示例

下麵的例子展示了 java.util.regex.Matcher.reset() 方法的用法。

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);   
      matcher.region(10, 15);
      System.out.println("Before reset, regionStart():" + matcher.regionStart());
      System.out.println("Before reset, regionEnd():" + matcher.regionEnd());
      
      matcher.reset();
      System.out.println("After reset, regionStart():" + matcher.regionStart());
      System.out.println("After reset, regionEnd():" + matcher.regionEnd());
   }
}

讓我們編譯並運行上麵的程序，這將產生以下結果——

Before reset, regionStart():10
Before reset, regionEnd():15
After reset, regionStart():0
After reset, regionEnd():18