JAVA_复用类

一.组合语法

类的单继承关系

 

class Car

{

   int
car_number;

   void set_number(int
car_num)

   {
car_number=car_num;}

   

   void
show_number()

  {System.out.println (“My car No. is
:”+car_number); }

}

 

class
TrashCar extends Car

{ 

  int capacity;

  void set_capacity(int
trash_car_capacity)

  { 
capacity=trash_car_capacity;}

 

  void
show_capacity();

 
{  

 
   System.out.println(“My
capacity is: ”+capacity);

  }

}

private WaterSource source=new WaterSource;

private Soap castille;

二.继承语法

public class Detergent extends Cleanser{}