import java.util.InputMismatchException;
import java.util.Scanner;

public class BacaUmurAman {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int umur = -1;

        while (umur < 0) {
            System.out.print("Masukkan umur (bilangan bulat): ");
            try {
                umur = sc.nextInt();
            } catch (InputMismatchException e) {
                String token = sc.next(); // buang token yang tidak valid
                System.out.println("Token \"" + token + "\" bukan bilangan bulat.");
            }
        }
        System.out.println("Umur tercatat: " + umur);
    }
}