জাভা রেজেক্সে POSIX ক্যারেক্টার ক্লাস \p{Space}

এই ক্লাস হোয়াইটস্পেস ক্যারেক্টারগুলো ম্যাচ করে, যেমন: \t, \n, \x0B, \f, \r।

উদাহরণ ১

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

public class SpaceCharacters {
    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{Space}]";

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

আউটপুট

Enter a string space tab test
Number of space characters: 2

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{Space}.*$";

        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 spaces: ");
        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: sample data hello welcome to tutorialspoint 12345 ab bc cd da
Strings with spaces: sample data welcome to tutorialspoint ab bc cd da