class Vehicle { 
    int speed,size,SpeedUp,SpeedDown;
    double move; 
    int ChangeSpeedup; 
    int ChangeSpeeddown; 
    Vehicle() {
    } 
    Vehicle(int r, int i) { 
        speed = r; 
        size = i;  
    } 
    public void move() { 
        move=1.0; 
        System.out.println("移动速度的距离"+move); 
    }
    public int setSpeed(int speed){ 
        this.speed=speed; 
        return speed; 
    }
    public int setSize(int size){ 
        this.size=size; 
        return size; 
    }
    public int SpeedUp(){ 
        System.out.println("加速时的速度："+SpeedUp); 
        return SpeedUp;   
    } 
    public int SpeedDown(){ 
        System.out.println("减速时的速度："+SpeedDown); 
        return SpeedDown; 
    }
   public void ChangeSpeedup(){ 
       ChangeSpeedup=speed+SpeedUp; 
       System.out.println("加速后的速度："+ChangeSpeedup); 
   }  
   public void ChangeSpeeddown(){ 
       ChangeSpeeddown=speed-SpeedDown; 
       System.out.println("减速后的速度："+ChangeSpeeddown); 
   } 
} 
public class TVehicle {
   public static void main(String[] args) {
         Vehicle ve=new Vehicle();
         ve.speed=5;
          ve.size=10; 
          System.out.println("初始速度为："+ve.speed); 
          System.out.println("初始体积为："+ve.size); 
         ve.SpeedUp=4; 
         ve.SpeedDown=1;
         ve.move(); 
         ve.SpeedUp(); 
         ve.SpeedDown(); 
         ve.ChangeSpeedup(); 
         ve.ChangeSpeeddown(); 
   }
}