哪个高手给我看个问题？

[wslusheng]

Given the following class definition in one source file:

class Base {

public Base (){ //... }

public Base ( int m ){ //... }

protected void fun( int n ){ //... }

}

public class Child extends Base{

// member methods

}

Which methods can be added into the Child class correctly?


A. private void fun( int n ){ //...}

B. void fun ( int n ){ //... }

C. protected void fun ( int n ) { //... }

D. public void fun ( int n ) { //... }

E. public m(){ //... }


应选：

[believefym]

bcd
子类不能缩小父类方法的可见性，所以fun可见性必须>=protected

[gemouzhi]

CD
think上是不是提过？

[gemouzhi]

原因就是楼上解释的，估计他笔误．

[believefym]

是cd

[wslusheng]

b 为什么不是？忧闷。

[believefym]

b默认是package权限的

[wslusheng]

默认是friendly，还是比protected小。