예제가 있는 Java의 Matcher reset() 메서드

java.util.regex.Matcher 클래스는 다양한 일치 작업을 수행하는 엔진을 나타냅니다. 이 클래스에 대한 생성자가 없습니다. java.util.regex.Pattern 클래스의 match() 메소드를 사용하여 이 클래스의 객체를 생성/얻을 수 있습니다.

이 (Matcher) 클래스의 reset() 메소드는 모든 상태 정보를 제거하고 문자 시퀀스를 기본값으로 재설정하고 위치를 0으로 추가합니다.

예시 1

import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Reset {
   public static void main(String[] args) {
      String str = "<p>This <b>is</b> an <b>example</b>HTML <b>script</b> where <b>every</b> alternative <b>word</b> is <b>bold</b></p>.";
      //Regular expression to match contents of the bold tags
      String regex = "<b>(\\S+)</b>";
      //Creating a pattern object
      Pattern pattern = Pattern.compile(regex);
      //Matching the compiled pattern in the String
      Matcher matcher = pattern.matcher(str);
      while (matcher.find()) {
         System.out.println("State of the matcher: "+matcher.toMatchResult());
         String result = matcher.group(1);
      }
      matcher = matcher.reset();
      System.out.println("State of the matcher after resetting it: "+matcher.toMatchResult());
   }
}

출력

State of the matcher: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=<b>is</b>]
State of the matcher: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=<b>example</b>]
State of the matcher: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=<b>script</b>]
State of the matcher: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=<b>every</b>]
State of the matcher: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=<b>>word</b>]
State of the matcher: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=<b>bold</b>]
State of the matcher: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=]
State of the matcher after resetting it: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=]

이 방법의 또 다른 변형은 문자열 데이터를 받아 Matcher를 재설정합니다.

예시 2

import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Reset {
   public static void main(String[] args) {
      String str = "<p>This <b>is</b> an <b>example</b> HTML <b>script</b> where <b>every</b> alternative <b>word</b> is <b>bold</b></p>.";
      //Regular expression to match contents of the bold tags
      String regex = "(\\S+)";
      //Creating a pattern object
      Pattern pattern = Pattern.compile(regex);
      //Matching the compiled pattern in the String
      Matcher matcher = pattern.matcher(str);
      while (matcher.find()) {
         System.out.println("State of the matcher: "+matcher.toMatchResult());
         String result = matcher.group(1);
      }
      matcher = matcher.reset("<b>this</b> is <b>new</b> string <b>after</b> reset");
      while (matcher.find()) {
         System.out.println("State of the matcher after resetting it: "+matcher.toMatchResult());
      }
   }
}

출력

State of the matcher: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=<b>is</b>]
State of the matcher: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=<b>example</b>]
State of the matcher: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=<b>script</b>]
State of the matcher: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=<b>every</b>]
State of the matcher: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=<b>word</b>]
State of the matcher: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,116 lastmatch=<b>bold</b>]
State of the matcher after resetting it: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,51 lastmatch=<b>this</b>]
State of the matcher after resetting it: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,51 lastmatch=<b>new</b>]
State of the matcher after resetting it: java.util.regex.Matcher[pattern=<b>(\S+)</b> region=0,51 lastmatch=<b>after</b>]