public class Test {
	public static void main(String[] args) {
		Students S = new Students();
		try {
			S.setAge(10);
		} catch (AgeNotFu ag) {
			System.out.println(ag.getMessage());

		}

	}
}

class Students {
	int age;

	public void setAge(int age) {

		if (age < 0) {
			throw new AgeNotFu("䲻Ϊ");

		}

		this.age = age;
		System.out.println("óɹ");

	}

}

class AgeNotFu extends RuntimeException {
	AgeNotFu(String message) {
		super(message);

	}

}