Java编译器提供错误——不包含类型的封闭实例。

I design a class:

我设计一个类:

public class CustomEvent< P, T >
{
  /** Facade interface used for adopting user interfaces to our generic class. */
  public interface ICaller< P, T >
  {
    /** callback facade method. */
    void call( P parent, T callback, Object... objects );
  }

  /** Abstract class for simplifying naming in constructor.  */
  public abstract class Caller implements ICaller< P, T >{}

  /** Constructor. */
  public CustomEvent( final String name, final P parent, final Caller caller ){}
}
public class Cust