Question

我有一个问题。我有代码： `

   public interface IUpgradeable
    {
    IUpgrade UpgradeEntity{ get; }
    }

public interface ISomeUpgrade : IUpgrade 
{
 // ...
}

public interface IUpgrade 
{
 // ...
}

public class SomeClass : IUpgradeable
{
 public ISomeUpgrade SomeUpgrade { // ...} 
}
`

为什么我不能用它？我需要更多接口来实现IUpgrade ......

Answer 1

SomeClass未实施IUpgradeable.UpgradeEntity.get

您指定了具有不同名称和不同返回类型的属性...

你能做的是

public class SomeClass : IUpgradeable
{
    public IUpgrade UpgradeEntity { get { ... return new CSomeUpgrade(); } } 
}

Answer 2

您必须明确地实现UpgradeEntity：

public interface IUpgradeable
{
    IUpgrade UpgradeEntity { get; }
}

public interface ISomeUpgrade : IUpgrade
{
    // ...
}

public interface IUpgrade
{
    // ...
}

public class SomeClass : IUpgradeable
{
    IUpgrade IUpgradeable.UpgradeEntity => SomeUpgrade;
    public ISomeUpgrade SomeUpgrade { get; }
}

Answer 3

您的类必须严格实现接口，不能更改返回类型的属性名称。

如果我理解正确，你真正想要的是一个实现btn.setOnAction(e -> window.setScene(anotherScene));的类，每个类有IUpgradable个不同的类。这可以使用泛型来获得：

IUpgrade

无法实现接口，其中包含接口

3 个答案: