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You can use the metacharacter "\z" to match the end of the input.
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 = "[0-9];\z"; //Compiling the regular expression Pattern pattern = Pattern.compile(regex); //Retrieving the matcher object Matcher matcher = pattern.matcher(input); int count = 0; if(matcher.find()) { System.out.println("Match found "); } else { System.out.println("Match not found "); } } }
Enter a String sample text Match not found
Enter a String sample text 23 Match found