java泛化有关问题

java泛化问题

Java code

package generics;public class Exercise22<T> {    T x;    Exercise22(Class<T> args)    {        try        {            x=args.newInstance();        }catch(Exception e)        {            System.out.print("error");        }    }    public static void main(String[] args)    {        Exercise22 e= new Exercise22(Integer.class);        System.out.print(e.x);    }}