翔仔老师好，我在jdk动态代理卡住了。在运行测试类ProxyDemo里报错一个错误：
错误提示我，需要泛型T，代码中不是已经强转成T了嘛，这是什么原因呢。jdk动态代理的工具类是这样的：

public class JdkDynamicProxyUtils {

	public static <T>T newProxyInstance(T targetObject, InvocationHandler handler){
		ClassLoader classLoader = targetObject.getClass().getClassLoader();
		Class<?>[]  interfaces = targetObject.getClass().getInterfaces();
		return (T)Proxy.newProxyInstance(classLoader, interfaces, handler);
	}
}

AlipayInvocationHandler类：

public class AlipayInvocationHandler implements InvocationHandler {

	private Object targetObject;

	public AlipayInvocationHandler(Object targetObject) {
		this.targetObject = targetObject;
	}

	@Override
	public Object invoke(Object o, Method method, Object[] args) throws Throwable {
		beforePay();
		Object result = method.invoke(targetObject, args);
		afterPay();
		return result;
	}

	private void beforePay() {
		System.out.println("从招行取款");
	}

	private void afterPay() {
		System.out.println("支付给imooc");
	}
}

测试类：

public class ProxyDemo {

	public static void main(String[] args) {
		ToBPaymentImpl toBPayment = new ToBPaymentImpl();
		AlipayInvocationHandler alipayInvocationHandler = new AlipayInvocationHandler(toBPayment);
		ToBPayment toBPaymentProxy = JdkDynamicProxyUtils.newProxyInstance(toBPayment, alipayInvocationHandler);
		toBPaymentProxy.pay();
	}
}

这是啥问题呢，麻烦老师看一下？