java - 泛型 : Inheriting from an abstract class that implements an interface

Question

我有以下界面:

public interface SingleRecordInterface<T> {
    public void insert(T object);
}

我有下面的抽象类(没有提到插入方法):

public abstract class AbstractEntry implements SingleRecordInterface<AbstractEntryBean> {
}

我有具体的类:

public class SpecificEntry extends AbstractEntry {
    public void insert(SpecificEntryBean entry) {
        // stuff
    }
}

最后，SpecificEntryBean定义为:

public class SpecificEntryBean extends AbstractEntryBean {
}

我有以下错误:

The type SpecificEntry must implement the inherited abstract method SingleRecordInterface.insert(AbstractEntryBean)

鉴于 SpecificEntryBean 扩展了 AbstractEntryBean，我不明白此错误的原因。如何修复此错误？

Answer 1

你还需要让你的抽象类泛化:

public abstract class AbstractEntry<T extends AbstractEntryBean> implements SingleRecordInterface<T> {
}

然后对于你的具体类:

public class SpecificEntry extends AbstractEntry<SpecificEntryBean> {
}