메타 문자 "\\D"를 사용하여 숫자가 아닌 문자를 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 = "\\D"; //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 non-digit characters: "+count); } }
출력
Enter a String sample text 2425 36 Number non-digit characters: 13
예시 2
import java.util.Scanner; public class RegexExample { public static void main( String args[] ) { //regular expression to accept 5 letter word String regex = "\\D{10}"; System.out.println("Enter input value: "); Scanner sc = new Scanner(System.in); String input = sc.nextLine(); boolean result = input.matches(regex); if(result) { System.out.println("input matched"); } else { System.out.println("wrong input"); } } }
출력 1
Enter input value: sample abc input matched
출력 2
Enter input value: sample1234 wrong input