定义一个交通工具(Vehicle)的类

代码：

public class Vehicle {    int speed;    int size;//  public Vehicle(int speed, int size) {//      this.speed = speed;//      this.size = size;//  }    public int getSpeed() {        return speed;    }    public void setSpeed(int speed) {        this.speed = speed;    }    public int getSize() {        return size;    }    public void setSize(int size) {        this.size = size;    }    public void move(){    }    public void speedUp() {        this.speed++;    }    public void speedDown() {        this.speed--;    }    public static void main(String[] args) {        // TODO Auto-generated method stub        Vehicle vechicle=new Vehicle();        vechicle.setSize(3);        vechicle.setSpeed(6);        System.out.println("体积为："+vechicle.getSize());        System.out.println("容量为："+vechicle.getSpeed());    }}

运行结果：

体积为：3容量为：6