Bound mismatch error in java

The login method would return a Page< HomePage> from its generic signature. You must make the generic parameter of HomePage. Your Item class is implementing the raw form of the Comparable interface. You should have it implement the generic form, by declaring a type parameter on Item itself. Then, ExpandableArrayList can implement the generic. Javaのややこしいジェネリクスの話をしよう。 * 1. すると、 以下のようなエラーが出る( Eclipse3. 6使用) Bound mismatch: The type Hoge is not a valid substitute for the bounded parameter < T extends Hoge< T> > of the type Hoge< T>. The problem here is that the Type in the interface ( T) is bound to extend C, therefore you are saying it must inherit from C. In your class which gives the implementation you don' t specify any bounds on the Type of parameter T. I think you' ve messed your question up. This compiles for me: import java. Serializable; interface IBaseDAO < T, PK extends Serializable> { } interface IEntityDAO< T extends BaseEntity> extends IBaseDAO< T, Integer>.

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  • Video:Error mismatch bound

    Mismatch error bound

    The error message comes from the fact that R is not within its bounds. Your ViewModelHelper class extends AbstractViewModel< IRefreshPostViewCallback >, no matter what R1 really is. In the class ViewModelHelper. If I understand your question, this class BinarySearchTree< T extends Comparable