譬如有这么一个类
[code="java"]
interface ITreeNode{
public ITreeNode getParent(){return parent;}
public List getSons() {return sons;}
}
[/code]
现在的问题是:
如果有个类RealTreeNode从它继承,结果一定是这样:
[code="java"]
class RealTreeNode implements ITreeNode{
List sons;
RealTreeNode parent;
public ITreeNode getParent(){return parent;}
public List getSons() {return sons;}
}
[/code]
我希望能是这样:
[code="java"]
class RealTreeNode implement ITreeNode{
List sons;
RealTreeNode parent;
public RealTreeNode getParent(){return parent;}
public List getSons() {return sons;}
}
[/code]
换句话说,我希望写这样的类的抽象,即包含两个方法getParent和getSons,它们返回[b]该类自身[/b]和[b]List<该类自身>[/b]。应该如何写?