java--面向对象之继承1（公有方法和私有方法）

- 日理万妓 2022-06-04 09:56 226阅读 0赞

**Vehicles:**

package JC;

public class Vehicles \{  
/\*public String brand;  
public String color;  
  
public Vehicles(String brand, String color) \{  
this.brand = brand;  
this.color = color;  
\}\*/  
  
private String brand;  
private String color;  
  
  
public Vehicles(String brand, String color) \{  
this.brand = brand;  
this.color = color;  
\}  
public void run()\{  
System.out.println(this.color+"的"+this.brand+"已经开动了");  
\}  
public void showInfo()\{  
System.out.println("商标："+this.brand+",颜色 ："+this.color);  
\}  
public String getBrand() \{  
return brand;  
\}  
public void setBrand(String brand) \{  
this.brand = brand;  
\}  
public String getColor() \{  
return color;  
\}  
public void setColor(String color) \{  
this.color = color;  
\}

**Car :**

package JC;  
  
  
public class Car extends Vehicles \{  
/\*public int seats;  
  
public Car(String brand, String color, int seats) \{  
super(brand, color);  
this.seats = seats;  
\}\*/  
  
private int seats;  
  
public Car(String brand, String color, int seats) \{  
super(brand, color);  
this.seats = seats;  
\}  
  
  
  
  
public void showCar()\{  
System.out.println(super.getColor()+"的"+super.getBrand()+"已经开动了"+this.seats);  
\}  
  
  
  
\}

**Trunk :**

package JC;  
  
  
public class Trunk extends Vehicles\{  
/\*public float load;  
  
public Trunk(String brand, String color, float load) \{  
super(brand, color);  
this.load = load;  
\}\*/  
  
private float load;  
  
  
public Trunk(String brand, String color, float load) \{  
super(brand, color);  
this.load = load;  
\}  
  
  
  
  
public void showTrunk()\{  
System.out.println(super.getColor()+"的"+super.getBrand()+"已经开动了"+this.load);  
\}  
  
  
\}

**Test:**

package JC;  
  
  
import org.junit.Test;  
  
  
  
  
public class jt \{  
@Test  
public void test1()\{  
/\*\*  
\* 公有方法  
\*/  
/\*Vehicles veh=new Vehicles("雪佛兰", "白色");  
Car car=new Car("雪佛兰", "黑色", 7);  
Trunk truck=new Trunk("一汽", "蓝色", 70000);  
  
veh.run();  
veh.showInfo();  
System.out.println(veh.brand);  
System.out.println(veh.color);  
  
car.showCar();  
car.run();  
System.out.println(car.brand);  
System.out.println(car.color);  
car.showInfo();  
System.out.println(car.seats);  
  
truck.showTrunk();  
truck.run();  
truck.showInfo();  
System.out.println(truck.brand);  
System.out.println(truck.color);  
System.out.println(truck.load);\*/  
  
/\*\*  
\* 私有方法  
\*/  
Vehicles veh=new Vehicles("雪佛兰", "白色");  
Car car=new Car("雪佛兰", "黑色", 7);  
Trunk truck=new Trunk("一汽", "蓝色", 70000);  
car.showCar();  
truck.showInfo();  
\}  
\}