java如何声明返回泛型类的方法？

Question

I am new to java i have a set of classes which extends AbsEntity class.I have a abstract method which should return a Class object and that Class object should be E extends AbsEntity type...here is how i am trying to declare

abstract Class<E externds AbsEntity> E getAbsEntity();

这个声明通过我的错误，其实我不知道hw的声明。。。返回类型应为类类型的方法，该类类型为Plz help

Answer 1

您可以使用以下代码：

static <E> E yourMethod(){
    AbsEntity absEntity = new AbsEntity();
    return (E)absEntity;
}

Answer 2

大概是这样的：

public <E extends AbsEntity> E yourMethod() {
    //yourObject
    return yourObject;
}

Answer 3

它应该在返回类型之前声明，如下所示：

    abstract <E extends AbsEntity> Class<E> getAbsEntity();

看看Oracle文档

希望这有帮助