每日学到 21 - 继承

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进行属性初识化和输出相关数据的方法；
// 使用Test类中的main方法定义各类初始化数据后台打印相关数据

package com.homework.eight.demo02;

public class Test {
    public static void main(String[] args) {
        
        Vehicle vehicle1 = new Vehicle(4,1.5);
        Car car1 = new Car(4,1.6,5);
        Truck truck1 = new Truck(4,1.8,4,3.5);
        vehicle1.printInfo();
        car1.printInfo();
        truck1.printInfo();
    }
}

package com.homework.eight.demo02;

public class Vehicle {
    private int wheels;
    private double weight;

    public Vehicle() {
    }

    public Vehicle(int wheels, double weight) {
        this.wheels = wheels;
        this.weight = weight;
    }

    /**
     * 获取
     * @return wheels
     */
    public int getWheels() {
        return wheels;
    }

    /**
     * 设置
     * @param wheels
     */
    public void setWheels(int wheels) {
        this.wheels = wheels;
    }

    /**
     * 获取
     * @return weight
     */
    public double getWeight() {
        return weight;
    }

    /**
     * 设置
     * @param weight
     */
    public void setWeight(double weight) {
        this.weight = weight;
    }

    public void printInfo(){
        System.out.println("车轮："+this.getWheels()+"车重："+this.getWeight());
    }
}

package com.homework.eight.demo02;

public class Car extends Vehicle{
    private int loader;

    public Car() {
        super();
    }

    public Car(int wheels, double weight, int loader) {
        super(wheels, weight);
        this.loader = loader;
    }

    /**
     * 获取
     * @return loader
     */
    public int getLoader() {
        return loader;
    }

    /**
     * 设置
     * @param loader
     */
    public void setLoader(int loader) {
        this.loader = loader;
    }

    public void printInfo(){
        System.out.println("车轮："+this.getWheels()+"车重："+this.getWeight()+"载人数："+this.getLoader());
    }

}

package com.homework.eight.demo02;

public class Truck extends Car{
    private double payload;

    public Truck() {
        super();
    }

    public Truck(int wheels, double weight, int loader, double payload) {
        super(wheels, weight, loader);
        this.payload = payload;
    }

    /**
     * 获取
     * @return payload
     */
    public double getPayload() {
        return payload;
    }

    /**
     * 设置
     * @param payload
     */
    public void setPayload(double payload) {
        this.payload = payload;
    }

    public void printInfo(){
        System.out.println("车轮："+this.getWheels()+"车重："+this.getWeight()+"载人数："+this.getLoader()+"载重量："+this.getPayload());
    }
}