2. 已知如下类定义: class Base { public Base (){ //... } public Base ( int m ){ //... } protected void fun( int n ){ //... } } public class Child extends Base{ // member methods } 如下哪句可以正确地加入子类中?
A. private void fun( int n ){ //...}
B. void fun ( int n ){ //... }
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