Lớp này khớp với các ký tự ASCII, tức là \ x00- \ x7F.
Ví dụ
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(); //Regular expression String regex = "^[\\p{ASCII}]"; //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-ASCII characters in the given string: "+count); } }
Đầu ra
Enter a string why do we fall Number of non-ASCII characters in the given string: 1