Java 正则 中的 Matcher reset()函数

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

Matcher reset() - 声明

public Matcher reset()

Matcher reset() - 示例

下面的示例显示java.util.regex.Matcher.reset()方法的用法。

package com.learnfk;

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);
      
      //获取匹配器对象
      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());
   }
}

让无涯教程编译并运行以上程序，这将产生以下输出-

无涯教程网

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