编写汽车类
Problem Description
1.实验目的
(1) 熟悉类的创建方法
(2) 掌握对象的声明与创建
(3) 能利用面向对象的思想解决一般问题
2.实验内容
编写一个java程序，设计一个汽车类Vehicle，包含的属性有车轮的个数wheels和车重weight。小汽车类Car是Vehicle的子类，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。
3.实验要求
补充完整下面的代码
public class Main{
public static void main(String[] args){
Vehicle v=new Vehicle(8,10.00);
smallCar c=new smallCar(6);
Truck t=new Truck(10);
v.disMessage();
c.disM();
t.disM2();
t.disM3();
}
}
// 你的代码
Output Description
The number of wheels in this car is 8, weight is 10.0
This car can carry 6 persons
The load of this truck is 10
The number of wheels in this truck is 8, weight is 10.0, can carry 6 persons, load of this truck is 10
解题代码
// Vehicle 类
class Vehicle{
// wheels 车轮个数
public int wheels;
// 重量
public double weight;
// 带参构造方法
public Vehicle(int wheels, double weight) {
this.wheels = wheels;
this.weight = weight;
}
// 无参构造方法
public Vehicle() {
}
// 打印信息
public void disMessage(){
System.out.println("The number of wheels in this car is " + wheels + ", weight is " + weight);
}
}
// smallCar类继承Vehicle类
class smallCar extends Vehicle{
// loader 载人数
public int loader;
// 带参构造 三个参数
public smallCar(int wheels, double weight, int loader) {
// 调用父类构造器
super(wheels, weight);
this.loader = loader;
}
// 带参构造 一个参数
public smallCar(int loader) {
// 调用父类构造 根据题目输出 wheels = 8 weight10.00
super(8, 10.00);
this.loader = loader;
}
// 无参构造
public smallCar() {
}
// 打印信息
public void disM(){
System.out.println("This car can carry " + loader + " persons");
}
}
// Truck类继承smallCar类
class Truck extends smallCar{
// payload 载重量
private int payload;
// 带参构造 一个参数
public Truck(int payload) {
// 调用父类构造 根据题目输出 loader = 6
super(6);
this.payload = payload;
}
// 带参构造 四个参数
public Truck(int wheels, double weight, int loader, int payload) {
// 调用父类构造
super(wheels, weight, loader);
this.payload = payload;
}
// 无参构造
public Truck() {
}
// 打印信息
public void disM2(){
System.out.println("The load of this truck is " + payload);
}
// 打印信息
public void disM3(){
System.out.println("The number of wheels in this truck is " + wheels + ", weight is " + weight + ", can carry " + loader + " persons, load of this truck is " + payload);
}
}