Java RegEx를 사용하여 단어가 아닌 경계를 일치시키는 방법은 무엇입니까?

메타 문자 "\\B"를 사용하여 단어가 아닌 경계를 일치시킬 수 있습니다.

예시 1

import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
   public static void main(String args[]) {
      //Reading String from user
      System.out.println("Enter a String");
      Scanner sc = new Scanner(System.in);
      String input = sc.nextLine();
      String regex = "\\B";
      //Compiling the regular expression
      Pattern pattern = Pattern.compile(regex);
      //Retrieving the matcher object
      Matcher matcher = pattern.matcher(input);
      int count = 0;
      while(matcher.find()) {
         count++;
      }
      System.out.println("Number of non-word boundaries: "+count);
   }
}

출력

Enter a String
this is a sample text
Number of non-word boundaries: 12

예시 2

import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
   public static void main( String args[] ) {
      String regex = "\\Bin";
      Scanner sc = new Scanner(System.in);
      System.out.println("Enter a string: ");
      String input = sc.nextLine();
      Pattern p = Pattern.compile(regex);
      Matcher m = p.matcher(input);
      int count = 0;
      while(m.find()) {
         count++;
      }
      System.out.println("no of non-word boundaries: "+count);
   }
}

출력

Enter a string:
this is a sample text in win tin pin sin
no of non-word boundaries: 4