代码如下:
```java
public class VideoProcessEngineProxy implements InvocationHandler {
private Object tar;

//绑定委托对象，并返回代理类
public Object bind(Object tar) {
    this.tar = tar;
    return Proxy.newProxyInstance(
            tar.getClass().getClassLoader(),
            tar.getClass().getInterfaces(),
            this);
}

@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
    Object result = method.invoke(tar, args);
    System.out.println("VideoProcessEngineProxy:" + method.getName() + ", " + result);
    return result;
}

public static VideoProcessEngine createVideoProcessEngine(String mInputPath,
                                                          SurfaceHolder mSurface,
                                                          Context context) {
    VideoProcessEngine _ins = VideoProcessEngine.createVideoProcessEngine(mInputPath, mSurface, context);

    VideoProcessEngineProxy proxy = new VideoProcessEngineProxy();
    return (VideoProcessEngine) proxy.bind(_ins);
}

}

`` 调用createVideoProcessEngine方法时, 报java.lang.ClassCastException: $Proxy3 cannot be cast toVideoProcessEngine`
啥情况?