public class Vehicle {
int speed;
int size;
public void move(){
System.out.println("开始行驶");
}
public void setSpeed(int speed){
this.speed=speed;
}
public void setSize(int size){
this.size=size;
}
public void speedUp(){
speed++;
System.out.println("加速后速度:"+speed);
}
public void speedDown(){
speed=speed-10;
System.out.println("减速后速度:"+speed);
if(speed<=0)
System.out.println("已停车");
}
}
public class TestVehicle {
public static void main(String[] args) {
// TODO Auto-generated method stub
Vehicle car=new Vehicle();
car.move();
car.setSpeed(30);
System.out.println("当前汽车速度是:"+car.speed);
car.setSize(3);
System.out.println("当前汽车体积是:"+car.size);
car.speedUp();
car.speedDown();
car.speedDown();
car.speedDown();
car.speedDown();
}
}