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我有三个接口:如何实现已经参数化并扩展了两个其他接口的接口?
public interface IAggregable<TElement extends IAggregable<TElement, TResult>, TResult> {
TResult aggregate(TResult intermediateResult);
}
public interface IDeeplyCloneable<TElement extends IDeeplyCloneable<TElement>> {
TElement deepClone();
}
public interface IContainer<TElement extends IAggregable<TElement, TResult> & IDeeplyCloneable<TElement>, TResult> {
TResult aggregateAllElements();
TElement cloneElementAtIndex(int index);
}
我尝试落实最后一个;
public class GTZCH<TElement, TResult> implements IContainer<TElement, TResult> {
public GTZCH() {
// TODO Auto-generated constructor stub
}
@Override
public TResult aggregateAllElements() {
// TODO Auto-generated method stub
return null;
}
@Override
public TElement cloneElementAtIndex(int index) {
// TODO Auto-generated method stub
return null;
}
}
,但我得到一个编译错误:
Bound mismatch: The type TElement is not a valid substitute for the bounded parameter <TElement extends
IAggregable<TElement,TResult> & IDeeplyCloneable<TElement>> of the type IContainer<TElement,TResult>
什么&
运营商在exends部分是指,我认为应该有一个昏迷不&扩展多个接口。
如何实现该接口的方式我不会使用原始类型?
这是'型和一个'约束。请参阅[关于类型边界的教程](https://docs.oracle.com/javase/tutorial/java/generics/bounded.html)。 –