class ClassA<T> {
	public T t;
}

class Samp04 {
	public static void main(String[] args){
		ClassA<Number> ca1 = new ClassA<Number>();
		ca1.t = new Integer(10);
		ClassA<? super Integer> ca2 = ca1;
		Number n = ca2.t;
		System.out.println(n);
	}
}