public static void main(String[] args) {
			
			Class<?> demo = null;
			try {
				System.out.println(new Instance().new Person().getClass().getName()); //内部类的实例化
				demo = Class.forName("Reflect.Instance$Person"); //内部类的类路径
			} catch (Exception e) {
				e.printStackTrace();
			}
			
			// 取得全部的构造函数
			Constructor<?> cons[] = demo.getConstructors();
			//内部类如何强制转换？？
		/*	try {
				per1 = (Instance.Person) cons[0].newInstance();
				per2 = (Instance.Person) cons[1].newInstance("Rollen");
				per3 = (Person) cons[2].newInstance(20);
				per4 = (Person) cons[3].newInstance("Rollen", 20);
			} catch (Exception e) {
				e.printStackTrace();
			}
			System.out.println(per1);
			System.out.println(per2);
			System.out.println(per3);
			System.out.println(per4);*/
		}