com.sun.proxy.$Proxy0 cannot be cast to ...-蒲公英云

com.sun.proxy.$Proxy0 cannot be cast to ...

Bertha 。 2021-08-11 17:35 998阅读 0赞

【错误提示】

Exception in thread "main" java.lang.ClassCastException: com.sun.proxy.$Proxy0 cannot be cast to proxy.test.Bank
    at proxy.test.ProxyTest2.main(ProxyTest2.java:40)

【报错代码】

package proxy.test;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
/*
 * 自测
 */
interface Bank{
    public void loan(String name,int money) ;
}
class Creditor implements Bank{
    @Override
    public void loan(String name,int money) {
        // TODO Auto-generated method stub
        System.out.println("贷款人："+name+",贷款金额（万元）:"+money);
    }
}
class MyInvocationHandler2 implements InvocationHandler{
    private Object obj;
    public MyInvocationHandler2(Object obj) {
        this.obj=obj;
    }
    @Override
    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
        // TODO Auto-generated method stub
        return method.invoke(obj, args);
    }
}
public class ProxyTest2 {
    public static void main(String[] args) {
        Bank credictor=new Creditor();
        InvocationHandler handler=new MyInvocationHandler2(credictor);
        Bank bank=(Bank)Proxy.newProxyInstance(Bank.class.getClassLoader(), Bank.class.getInterfaces(), handler);
        bank.loan("王二小", 300);
    }
}

【错误改正】

将main方法中
Bank bank=(Bank)Proxy.newProxyInstance(Bank.class.getClassLoader(), Bank.class.getInterfaces(), handler);
改为：
Bank bank=(Bank)Proxy.newProxyInstance(credictor.getClass().getClassLoader(), credictor.getClass().getInterfaces(), handler);