Class類（java.lang.Class）

public final class Class<T>extends Objectimplements Serializable, GenericDeclaration, Type, AnnotatedElement

Class對象的三種實例化模式

1. 對象.getClass();
2. 類.class;
3. Class.forName(String className)

   public static Class<?> forName(String className) throws ClassNotFoundException

Class類對象（類）的實例化形式

Class類的對象.newInstance(); 

				public T newInstance()throws InstantiationException,  IllegalAccessException

反射的一般實例：

class Phone {

    public Phone() {

        System.out.println("Phone類的構造方法");

    }

    public String toString() {

        return "是一部手機";

    }

}

public class Test {

    public static void main(String[] args) throws Exception {

        Class<Phone> cls = Phone.class;

        Phone p2 = cls.newInstance();

        System.out.println("p2: " + p2);

    }

}