多态的一个实例

class Base{ 
    
    String var1="This is the base";
    static String var2="This is the base static";


static void say(){
System.out.println("base static is using");
  
}
  
    void get(){
  System.out.println("base is using");
        }
  
}
public class Sub extends  Base {

  String var1="This is the sub";
  static String var2="This is the sub static";

static void say(){
    System.out.println("sub static is using");
  
}
  
  void get(){
  System.out.println("sub is using");
  }

  public static void main(String[] args){
      Base bs=new Sub();
      System.out.println(bs.var1);//打印base 类的属性
      System.out.println(bs.var2);//打印base 类的属性
                  
      bs.say();//打印base 因为static声明的为类的实例
      bs.get();//打印sub 对象的方法
    
      
      }
}