[JAVA]好的电梯程序的设计

一个比较好的电梯程序

public class TestGoodElevator { public static void main(String args[]) { GoodElevator e2 = new GoodElevator(); e2.openDoor(); e2.closeDoor(); e2.goUp(); e2.goUp(); e2.goDown(); System.out.println("电梯在第"+e2.getFloor()+"层"); e2.openDoor(); e2.closeDoor(); e2.goDown(); e2.openDoor(); e2.closeDoor(); e2.goDown(); e2.goDown(); if(e2.getFloor()!=5&&!e2.isOpen()) e2.setFloor(5); e2.openDoor(); e2.closeDoor(); e2.setFloor(10); System.out.println("-------电梯测试结束-------"); } } class GoodElevator { private boolean doorOpen=false; private int floor = 1; private int weight = 0; final int CAPACITY=1000; final int TOP_FLOOR = 5; final int BOTTOM_FLOOR = 1; public void openDoor() { doorOpen = true; } public void closeDoor() { checkWeightSensors(); if(weight<=CAPACITY) doorOpen = false; else System.out.println("超重，门不能关！"); } private void checkWeightSensors() { weight = (int)(Math.random()*1500); System.out.println("当前乘客总重量是:"+weight+"公斤"); } public void goUp() { if(!doorOpen) { if(floor<TOP_FLOOR) { floor++; System.out.println("电梯已上到第"+floor+"层"); } else System.out.println("电梯已在顶层，不能再上升"); } else System.out.println("电梯门未关，不能上升！"); } public void goDown() { if(!doorOpen) { if(floor>BOTTOM_FLOOR) { floor--; System.out.println("电梯已下到第"+floor+"层"); } else System.out.println("电梯已在最底层，不能再下降"); } else System.out.println("电梯门未关，不能下降！"); } public void setFloor(int goal) { if(goal>=BOTTOM_FLOOR&&goal<=TOP_FLOOR) { while(floor!=goal) { if(floor<goal) goUp(); else goDown(); } System.out.println("电梯按要求停在第"+goal+"层"); } else System.out.println("没有第"+goal+"层"); } public int getFloor() { return floor; } public boolean isOpen() { return doorOpen; } }

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