Question

求java大神啊

题目:定义一个交通工具(Vehicle)的类,其中有属性:交通工具名称(name)体积(size)、重量((weight、当前速度((speed)方法:构造方法(设置名称、体积、重量、初始速度(0)),加速speedup,减速speeddown0,打印体积、重量、当前速度等状态数据的方法。在测试类的main0方法中实例化一个交通工具对象,通过构造方法给它的体积、重量、初始速度赋初值,并且打印出来。然后,对此对象进行加速、减速操作,并输出其状态数据。

Answer 1

代码如下：

class Vehicle {

private String name;

private int size;

private int weight;

private int speed;

public Vehicle(String name, int size, int weight) {

this(name, size, weight, 0);

}

public Vehicle(String name, int size, int weight, int speed) {

this.name = name;

this.size = size;

this.weight = weight;

this.speed = speed;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public int getSize() {

return size;

}

public void setSize(int size) {

this.size = size;

}

public int getWeight() {

return weight;

}

public void setWeight(int weight) {

this.weight = weight;

}

public int getSpeed() {

return speed;

}

public void setSpeed(int speed) {

this.speed = speed;

}

public void speedUp(int speed) {

this.speed += speed;

}

public void speedDown(int speed) {

this.speed -= speed;

if (this.speed < 0) {

this.speed = 0;

}

}

}

public class App {

public static void main(String[] args) {

Vehicle vehicle = new Vehicle("Car", 10, 1000, 0);

System.out.println("Name = " + vehicle.getName() + ", Size = " + vehicle.getSize() + ", Weight = " + vehicle.getWeight() + ", Speed = " + vehicle.getSpeed());

vehicle.speedUp(50);

System.out.println("Name = " + vehicle.getName() + ", Size = " + vehicle.getSize() + ", Weight = " + vehicle.getWeight() + ", Speed = " + vehicle.getSpeed());

vehicle.speedUp(50);

System.out.println("Name = " + vehicle.getName() + ", Size = " + vehicle.getSize() + ", Weight = " + vehicle.getWeight() + ", Speed = " + vehicle.getSpeed());

vehicle.speedDown(20);

System.out.println("Name = " + vehicle.getName() + ", Size = " + vehicle.getSize() + ", Weight = " + vehicle.getWeight() + ", Speed = " + vehicle.getSpeed());

}

}

运行结果：

Answer 2

求java大神啊