ArrayList的问题

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public class test2 {
  @SuppressWarnings(value={"unchecked"}) public static void main(String[] args) { System.out.println("欢迎光临光复餐厅,本餐厅已开始营业"); System.out.println("今天天气:阳光普照"); ArrayList<Customer> customerList = new ArrayList<Customer>();
    ArrayList pricea = new ArrayList();
    ArrayList priceb = new ArrayList();
    ArrayList passtime = new ArrayList();
    int x = 0;
    int y = 0;
    int m;
    int n;
     while (true)     { String choice = ConsoleIn.readLine();
      String a[] = choice.split("\\s+");
      Scanner scanner = new Scanner(System.in);
  if(a[0].equals("new"))       {  if(a[1].equals("A")) { x++;
        String type = a[1]; String mealPrice = a[2];
        int mealTime = 30;
        pricea.add(a[2]); Customer customer = new Customer(30, type,Integer.parseInt(mealPrice)); customerList.add(customer);
        System.out.println("新来的客人坐到了座位上点了"+pricea.get(x-1)+"元"+"的餐点,并开始用餐");
       }         if(a[1].equals("B")) { y++;
        String type = a[1]; String mealPrice = a[2];
        int mealTime = 40;
        priceb.add(a[2]); Customer customer = new Customer(40, type,Integer.parseInt(mealPrice)); customerList.add(customer);
        System.out.println("新来的客人坐到了座位上点了"+priceb.get(y-1)+"元"+"的餐点,并开始用餐"); } }
      if(a[0].equals("status"))
      {  for(m=1;m<=x;m++)
        {
          System.out.println("一位点"+"\t"+pricea.get(m-1)+"元"+"\t"+"的A类型客人已用餐");
        }
        for(n=1;n<=y;n++)
        {
          System.out.println("一位点"+"\t"+priceb.get(n-1)+"元"+"\t"+"的B类型客人已用餐");
        }
      
        System.out.println(passtime.get(0));
      
      }
      else if (a[0].equals("pass"))       {  String timePassed = a[1];
        System.out.println("经过了"+timePassed+"分钟");
        double e = Double.parseDouble(timePassed); passtime.add(e);
        double k = passtime.get(0);
        for (int i=0;i<x+y;i++)         {  
          Customer c=customerList.get(i); double mealTimeLeft=c.getMealTime(e); System.out.println("点"+c.mealPrice+"元的客人"+"用餐时间还剩下"+mealTimeLeft+"分钟"); }
         System.out.println("-----------------------------------------------------------------------------"); }
      else if (a[0].equals("exit"))       { break; } } }
}

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ArrayList passtime = new ArrayList();

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double k = passtime.get(0);