class TiXing{
     private float up,height;
     private static float down;
    
    TiXing(float x,float y,float z){
        up=x;
        height=y;
        down=z;
    }
    public void display(){
        System.out.println("up is:"+up+"height is:"+height+"down is:"+down);
    }
    public static
 
 void change(float number){
        down=number;
        //System.out.println("height:"+height);//出錯
    }
}

public class ep3_9{
    public static void main(String args[]){
        TiXing one=new TiXing(1,2,3);
        one.display();
        TiXing two=new TiXing(4,5,6);
        one.display();
        two.display();
    
        
 
//TiXing.display();//出錯
        one.change(101);
        one.display();
        two.change(102);
        two.display();    
    }
}