lift.java

一个电梯模拟程序

package lift.component;

import lift.component.type.Floor;

public class lift {
    private static Floor currentFloor;
    
    public lift(Floor f) {
        currentFloor = f;
    }
    
    public static Floor getCurrentFloor(){
        return currentFloor;
    }    
    
    public void goUpward(){
        switch(currentFloor.ordinal()+1){
            case 0:
                currentFloor = Floor.F1;
                break;
            case 1:
                currentFloor = Floor.F2;
                break;
            case 2:
                currentFloor = Floor.F3;
                break;
            case 3:
                currentFloor = Floor.F4;
                break;
            default:
                currentFloor = null;
        }
    }
    
    public void goDownward(){
        switch(currentFloor.ordinal()-1){
            case 0:
                currentFloor = Floor.F1;
                break;
            case 1:
                currentFloor = Floor.F2;
                break;
            case 2:
                currentFloor = Floor.F3;
                break;
            case 3:
                currentFloor = Floor.F4;
                break;
            default:
                currentFloor = null;
        }
    }
    
}