Java tutorial
import java.util.Locale; import java.util.Scanner; public class Main { public static void main(String[] args) { String s = "java2s.com "; Long l = 1234567890987654L; s = s + l; Scanner scanner = new Scanner(s); // use US locale in order to be able to identify long in a string scanner.useLocale(Locale.US); while (scanner.hasNext()) { // check if the scanner's next token is a long with radix 4 System.out.println(scanner.hasNextLong(4)); System.out.println(scanner.next()); } scanner.close(); } }