জাভা রেজেক্সে POSIX ক্যারেক্টার ক্লাস \p{Punct}

এই ক্লাস পাঙ্কচুয়েশন মার্ক (punctuation marks) ম্যাচ করে: !"#$%&'()*+,-./:;<=>?@[\]^_`{|}~।

উদাহরণ ১

import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class AlphanumericExample {
    public static void main(String args[]) {
        System.out.println("Enter a string");
        Scanner sc = new Scanner(System.in);
        String input = sc.nextLine();

        String regex = "[\\p{Punct}]";

        Pattern pattern = Pattern.compile(regex);
        Matcher matcher = pattern.matcher(input);
        int count = 0;
        while(matcher.find()) {
            count++;
        }
        System.out.println("Number of punctuation marks: " + count);
    }
}

আউটপুট ১

Enter a string Hello, how are you. Welcome to Tutorialspoint.
Number of punctuation marks: 3

উদাহরণ ২

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 = "^\\p{Punct}+$";

        Scanner sc = new Scanner(System.in);
        System.out.println("Enter 5 input strings: ");
        String input[] = new String[5];
        for (int i = 0; i < 5; i++) {
            input[i] = sc.nextLine();
        }

        Pattern p = Pattern.compile(regex);
        System.out.println("Strings with only punctuation characters: ");
        for(int i = 0; i < 5; i++) {
            Matcher m = p.matcher(input[i]);
            if(m.matches()) {
                System.out.println(m.group());
            }
        }
    }
}

আউটপুট

Enter 5 input strings: hello 1234 123text.!! !!!!! ..!!,,
Strings with only punctuation characters: !!!!! ..!!,,