第五次上机

4、编写一个Java应用程序，设计一个汽车类Vehicle，包含的属性有车轮个数wheels和车重weight。小车类Car是Vehicle的子类，其中包含的属性有载人数loader。卡车类Truck是Car类的子类，其中包含的属性有载重量payload。每个类都有构造方法和输出相关数据的方法。最后，写一个测试类来测试这些类的功能。

package Programe;

public class Vehicle {
       public int wheels;
       public double weight;
       public Vehicle( int wheels,double weight){
           this.wheels = wheels;
           this.weight = weight;
       }
       public void Print_Data(){
           System.out.println("车轮数："+wheels+"车重："+weight);
       }
}

package Programe;

public class Car extends Vehicle{
       public int loader;
       public Car(int wheels,double weight,int loader){
           super(loader, weight);
           this.wheels = wheels;
           this.weight = weight;
           this.loader = loader;
       }
       @Override
       public void Print_Data(){
           System.out.println("车轮数："+wheels+"车重："+"weight"+"载人数："+loader);
       }
}

package Programe;

public class Truck extends Car {
       public double payload;
       public Truck(int wheels,double weight,int loader,double payload){
           super(loader, payload, loader);
           this.wheels = wheels;
           this.weight = weight;
           this.loader = loader;
           this.payload = payload;
       }
       @Override
       public void Print_Data(){
           System.out.println("车轮数："+wheels+"车重："+weight+"载人数："+loader+"载重量："+payload);
       }
}

package Programe;
 
public class Test {
       public static void main(String[] args){
           Vehicle v = new Vehicle(4,400);
           Car c = new Car(4,500,6);
           Truck t = new Truck(6,800,4,2000);
           v.Print_Data();
           c.Print_Data();
           t.Print_Data();
       }
}

编写一个Java应用程序，该程序包括3个类：Monkey类、People类和主类E。要求：

(1) Monkey类中有个构造方法：Monkey (String s)，并且有个public void speak()方法，在speak方法中输出“咿咿呀呀......”的信息。
(2)People类是Monkey类的子类，在People类中重写方法speak(),在speak方法中输出“小样的，不错嘛！会说话了！”的信息。
(3)在People类中新增方法void think()，在think方法中输出“别说话！认真思考！”的信息。
(4)在主类E的main方法中创建Monkey与People类的对象类测试这2个类的功能。

package Programe;

public class Monkey {
       Monkey(String s){
       }
       public void speak(){
           System.out.println("咿咿呀呀......");
       }
}

package Programe;

public class People extends Monkey{
       public People(String s){   
           super(s);
       }
       @Override
       public void speak(){
           System.out.println("小样的，不错嘛，会说话了！");
       }
       public void think(){
           System.out.println("别说话！ 认真思考！");
       }
}

package Programe;

public class E {
       public static void main(String[] args){
              Monkey m = new Monkey("王佳胜");
              People p = new People("苏炎");
              System.out.println("王佳胜:");
              m .speak();
              System.out.println("苏炎:");
              p.speak();
              p.think();
  }
}