小编Rya*_*yan的帖子

Exception in thread "main" java.lang.NullPointerException
    at MovieSeating.assignCustomerAt(MovieSeating.java:27)
    at Assignment8.main(Assignment8.java:84)

我有一个文本文件:

• 约翰·史密斯
• 乔治布什
• 随机人
• 第四个名字

当我在程序中名为customerData.txt的文本文件中调用此数据并将名称分配给2d数组中的单元格时,我得到一个nullPoint错误,并且不知道如何解决这个问题.

谢谢!

    public class Customer
     {
       private String lastName;
       private String firstName;

       // This constructor sets the first name and last name to "????
       public Customer()
       {
              lastName = "???";
              firstName = "???";
       }

      // This constructor constructs a Customer object  given the last name and first name
       public Customer(String customerInfo)
       {
             int space = customerInfo.indexOf(" ");
             firstName = customerInfo.substring(0, space).trim();
             lastName = customerInfo.substring(space+1).trim();

       }

       // …