大家来看看这段代码的输出会是什么？不要用编译器！

Question

public class Base {     private String baseName = "base";     public Base()     {         callName();     }     public void callName()     {         System. out. println(baseName);     }     static class Sub extends Base     {         private String baseName = "sub";         public void callName()         {             System. out. println (baseName) ;         }     }     public static void main(String[] args)     {         Base b = new Sub();     } }

Answer 1

看看这段代码的输出是什么？并解释。