！！一个关于“is a”的问题！！

dspjava

What is "is a" relation?(Choose one)
A.public interface Color{}
  public class Shape{private Color color;}
B.interface Component{}
class Container implements Component{
private Component[] children;
}

C.public class Speces{}
  public class Animal{private Species species;}

答案选哪个呢？

我觉得B,C都对的？但是只能选一个啊！

dafan

only B is right

dafan

派生类"is a"基类

dspjava

C是不是内部类啊？

cinc

C 不是内部类：

public class A{
     class B{
     }
}

class B 是内部类