java面向对象思维程序设计开发以及案例 -电梯运行问题对象分析与程序设计(1)

public class ElevatorTest {
    public static void main(String[] args){
        //18层的电梯
        int floor = 18;
        //电梯初始化
        Elevator elevator = new Elevator(floor);
        //创建一个线程池，初始化两个线程，1：电梯运行线程，2：模拟随机层数人员进入电梯线程
        ThreadPoolExecutor threadPoolExecutor = new ThreadPoolExecutor(2,2,10L, TimeUnit.SECONDS,new  ArrayBlockingQueue(2));
        //启动电梯
        threadPoolExecutor.execute(elevator);
        //模拟随机楼层人员进电梯与出电梯
        threadPoolExecutor.execute(()->{
                while (true){
                    //模拟随机生成 1~18楼人
                    int enterRandom = new Random().nextInt(18);
                    if(enterRandom ==0){
                        continue;
                    }else {
                        try {
                            //人员进入
                            elevator.enter(enterRandom);
                            Thread.sleep(3000);
                        }catch (InterruptedException e){
                        }
                    }
                }
        });
    }
}
class Elevator implements Runnable {
    boolean start = false;
    int currentFloor ;
    boolean directionTop = true;
    int floor ;
    //保存目标层数map
    Map enterMap = new HashMap(18);
    ReentrantLock lock = new ReentrantLock();
    public Elevator(int floor){
        this.floor = floor;
        this.currentFloor = 1;
        System.out.println("初始化了一个"+floor+"层的电梯，当前电梯在第1层");
    }
    /**
     * 人员进入电梯同时选择好目标层数
     * */
    public void enter(int outFloor){
        lock.lock();
        System.out.println("人员进入，按了"+outFloor+"层");
        enterMap.put(outFloor,null);
        lock.unlock();
    }
    /**
     * 是否是顶层
     * */
    public boolean isTop(){
        return this.currentFloor == floor;
    }
    /**
     * 是否是底层
     * */
    public boolean isBottom(){
        return this.currentFloor == 1;
    }
    @Override
    public void run() {
        System.out.println("电梯启动");
        start = true;
        while (start){
            if(!lock.isLocked()) {
                try {
                    if (directionTop) {
                        currentFloor++;
                        System.out.println("当前在电梯第" + currentFloor + "层");
                        //该层人员出门出门后将该层移除
                        if(enterMap.containsKey(currentFloor)){
                            try {
                                System.out.println(currentFloor+"人员出门");
                                enterMap.remove(currentFloor);
                                System.out.println("剩余楼层"+enterMap.keySet());
                                Thread.sleep(5000);
                            }catch (Exception e){
                            }
                        }
                        if (isTop()) {
                            directionTop = false;
                            System.out.println("到达顶层，开始向下运行");
                        }
                    } else {
                        currentFloor--;
                        System.out.println("当前在电梯第" + currentFloor + "层");
                        //该层人员出门出门后将该层移除
                        if(enterMap.containsKey(currentFloor)){
                            try {
                                System.out.println(currentFloor+"人员出门");
                                enterMap.remove(currentFloor);
                                System.out.println("剩余楼层"+enterMap.keySet());
                                Thread.sleep(5000);
                            }catch (Exception e){
                            }
                        }
                        System.out.println("当前在电梯第" + currentFloor + "层");
                        if (isBottom()) {
                            directionTop = true;
                            System.out.println("到达1层，开始向向运行");
                        }
                    }
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                }
            }else {
                try {
                    System.out.println("进人中。。");
                    Thread.sleep(5000);
                }catch (Exception e){
                }
            }
        }
    }
}