public class MainClass {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		System.out.println(invoer("test"));
	}


	private static int invoer(String input){
		int aantal = -1;
		try{
			aantal = Integer.parseInt(input);
		}
		catch(Exception e){
			System.out.println("geen getal");
		}
		return aantal;
	}
}