java 文件 readline 返回 null

Question

我正在尝试用 Java 创建一个预订系统，但是每次运行该程序时，while 循环(如下所示)都会直接跳到末尾，就好像读取的行为空

   //hardcoded file path - needs to be changed when program moved
            String fileName = "C:\\Users\\BOO\\Desktop\\SystemsSoftwareBookingsystem\\FilmData.txt";
            String line = null;
            int readInt = 0;
            float readFloat = 0;
            int item_counter = 0;

    try
            {

             BufferedReader bufferedReaderF = new BufferedReader(new FileReader(new File(fileName)));  

 while ((line = bufferedReaderF.readLine()) != null)
            {
                Film tmpFilm = new Film();

                switch (item_counter)
                {
                    case 0:
                {
                    line = bufferedReaderF.readLine();
                    tmpFilm.name = line;
                    item_counter++;
                    break;
                }
                case 1:
                {
                    readInt = bufferedReaderF.read();
                    tmpFilm.seatsTotal = readInt;
                    item_counter++;
                    break;
                }
                case 2:
                {
                    readInt = bufferedReaderF.read();
                    tmpFilm.seatsAvailable = readInt;
                    item_counter++;
                    break;
                }
                case 3:
                {
                    readInt = bufferedReaderF.read();
                    tmpFilm.price = readFloat;
                    item_counter++;
                    break;
                }
                case 4:
                {
                    readInt = bufferedReaderF.read();
                    tmpFilm.showingTime = readFloat;
                    item_counter++;
                    break;
                }
                case 5:
                {
                    readInt = bufferedReaderF.read();
                    tmpFilm.day = readInt;
                    item_counter++;
                    break;
                }
                case 6:
                {
                    readInt = bufferedReaderF.read();
                    tmpFilm.month = readInt;
                    item_counter++;
                    break;
                }
                case 7:
                {
                    readInt = bufferedReaderF.read();
                    tmpFilm.year = readInt;
                    item_counter = 0;
                    break;
                }
                }

                line = bufferedReaderF.readLine();

                server.filmList.add(tmpFilm);

            }

            bufferedReaderF.close();

        } catch (FileNotFoundException ex)
        {
            System.out.println("Unable to open file '" + fileName + "'");
        } catch (IOException ex)
        {
            System.out.println("Error reading file '" + fileName + "'");
        }
    }
}`

任何想法/帮助将不胜感激

编辑根据要求在 while 循环中添加了其余代码

编辑这里是我正在读取的文件

Film 1
10
10
5.00
10.30
Wednesday 23rd
July
2013

Answer 1

我不知道这是否与问题有关，但您需要在 switch 中的每个代码序列之后放置 break; 语句。否则，如果 item_counter 为 0，它将执行 0 的代码，然后失败并执行 1 的代码，然后执行 2 的代码，依此类推。