class ClassA<T> {
	public T t;
}

class Samp03 {
	public static void main(String[] args){
		ClassA<Integer> ca1 = new ClassA<Integer>();
		ca1.t = new Integer(10);
		ClassA<? extends Number> ca2 = ca1;
		Number n = ca2.t;
		System.out.println(n);
	}
}