摘要：1先看一个简单点动态代理的例子（没有用到factory）21定义接口3packagecom.dynamic.simple;45importcom.dynamic.simple.Subject;67publicinterfaceSubject{8publicvoidrequest();9}10112实现真实类12packagecom.dynamic.simple;1314publicclassRealSubjectimplementsSubject{15publicRealSubject(){}16publicvoidrequest(){17System.out.println("Fr 阅读全文

摘要：public class Test {public static class A{}public static class B extends A{}public final static void main(String[] args){A a = new A();A a1 = null;B b = new B();B b1 = null;//b1 = (B)a; //Test$A cannot be cast to Test$Bb1 = (B)a1;}} 阅读全文