Question

我的代码

 Random random = new Random();
 int economySeat = random.nextInt(23 - 12 + 1) + 12;
 seatNumber = economySeat;
 if (seatManager.getSeats()[seatNumber] == false) {
   seatManager.getSeats()[seatNumber] = true;
 }

从显示范围内的布尔数组中随机选择经济座位。如何在我运行程序时选择空座位？目前，当只剩下一个座位时，我必须多次按下一个选择按钮，例如

Answer 1

此解决方案不允许SeatManager的消费者提交随机数来获得席位。相反，它使用随机索引为座位返回随机随机座位号。我认为这是更干净的实施。您可以针对您的UI进行调整。

import java.util.ArrayList;
import java.util.Calendar;
import java.util.Random;

public class SeatConsumer
{

    public static void main(String [] Args)
    {
        SeatManager sm = new SeatManager();

        int RandomEconomySeat = 0;
        while(RandomEconomySeat > -1)
        {
            RandomEconomySeat = sm.GetRandomEconomySeat();
            if(RandomEconomySeat > -1 && sm.SetEconomySeat(RandomEconomySeat))
            {
                System.out.println(sm); 
            }
            else
            {
                return;
            }
        }
    }


}


class SeatManager
{

    private final int StartingEconomy = 12;
    private final int EndingEconomy = 24;
    private boolean [] seats;

    private ArrayList<Integer> availableSeats = new ArrayList<Integer>();
    private ArrayList<Integer> seatIndexes = new ArrayList<Integer>();
    public SeatManager()
    {
        seats = new boolean[(EndingEconomy+1)-StartingEconomy];
        for(int i=StartingEconomy; i<=EndingEconomy; i++)
        {
            availableSeats.add(i);
            seatIndexes.add(i);
        }
    }

    public int GetRandomEconomySeat()
    {
        Random random = new Random();
        random.setSeed((Calendar.getInstance().getTimeInMillis()));

        if(availableSeats.size() > 0)
        {
          int randomIndex = random.nextInt(availableSeats.size());
          return availableSeats.get(randomIndex);
        }
        return -1;

    }


    public boolean SetEconomySeat(int seat)
    {
        if(seat >0)
        {
            int seatIndex = seatIndexes.indexOf(seat);
            seats[seatIndex]=true;
            if(availableSeats.contains(seat))
            {
               int availSeatIndex = availableSeats.indexOf(seat);
               availableSeats.remove(availSeatIndex);
               return true;
            }
            return false;

        }
        return false;   

    }

    public String toString()
    {
        String temp = "";
        for(boolean b : seats)
        {
            //should use string builder; however this is a quick example
            if(b)
            {
                temp += "1 ";

            }
            else 
            {
                temp += "0 ";
            }
        }
        return temp;
    }
}

仅从布尔阵列的座位预订中选择空座位

1 个答案: