交通工具(Vehicle)的类

public class Vehicle {
int speed=80;
int size;

void move(int s){
System.out.println("这车移动了"+s);
}
void setspeed(int speed)    {
    speed=speed;
    System.out.println("这车的初速度是"+speed);
}
int  speedup()    {
    int s1=speed+10;
    return s1;
}
int speeddown(){
    int s2=speed-10;
    return s2;
}
    
    
}

public class Test{
    public static void main(String[] args) {

    
int size=10;
System.out.println(size);
int speed=80;
System.out.println(speed);

    Vehicle v=new Vehicle();
    v.move(5000);
    v.setspeed(100);
    int s1=v.speedup();
 System.out.println(s1);
    int s2=v.speeddown();
System.out.println(s2);
        
    }
}