英文:
Assigning a variable of type class to a different class that extends the declared variable type
问题
这样我已经声明了：
Class<ThemeControls> thisClass = ThemeControls.class;
我想通过一个继承了 ThemeControls 的单独类来访问这个类内部的方法和变量。这个类是：
public class BaseControls extends ThemeControls { ... }
当使用以下代码行时会出现错误：
thisClass = BaseControls.class;
错误信息：
不兼容的类型
因为 BaseContols 继承了 ThemeControls，所以它可以被声明为相同的类型吗？
英文:
So I have declared this:
Class<ThemeControls> thisClass = ThemeControls.class;
I would like to access the methods and variables within this class through a separate class that extends ThemeControls. This class:
public class BaseControls extends ThemeControls { ... }
An error this thrown when using this line of code:
thisClass = BaseControls.class;
Error:
Incompatible types
Since BaseContols extends ThemeControls, it can be declared as the same type?
答案1
得分: 3
如Class<BaseControls>不是准确的Class<ThemeControls>。您需要使用Class<? extends ThemeControls>。
所以：
Class<? extends ThemeControls> thisClass = BaseControls.class;
英文:
As Class<BaseControls> is not exact Class<ThemeControls>. You need to use Class<? extends ThemeControls>.
So:
Class<? extends ThemeControls> thisClass = BaseControls.class;;
答案2
得分: 1
这对你来说必须有效：
Class<? extends ThemeControls> thisClass =...
英文:
This must work for you:
Class<? extends ThemeControls> thisClass =...
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