java文件读取行返回null

我试图用Java创建一个预订系统，但是每次我运行这个程序时，while循环（如下所示）都会直接跳到末尾，就像读取的行是空的一样

   //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 + "'");
        }
    }
}`

如有任何想法/帮助，将不胜感激

根据请求编辑while循环中添加的其余代码

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

除去-

line = bufferedReaderF.readLine();

并在循环中读取-

while ((line = bufferedReaderF.readLine()) != null)

检查文件是否为空。您是否可以同时使用内部代码更新您的问题

基于您的编辑-

你忽略了你正在读的东西。应该是这样的-

switch (item_counter)
{
    case 0:
    {
        tmpFilm.name = line;
        item_counter++;
        break;
    }
    case 1:
    {                    
        tmpFilm.seatsTotal = Integer.parseInt(line);
        item_counter++;
        break;
    }
    ...etc...

除去-

line = bufferedReaderF.readLine();

并在循环中读取-

while ((line = bufferedReaderF.readLine()) != null)

检查文件是否为空。您是否可以同时使用内部代码更新您的问题

基于您的编辑-

你忽略了你正在读的东西。应该是这样的-

switch (item_counter)
{
    case 0:
    {
        tmpFilm.name = line;
        item_counter++;
        break;
    }
    case 1:
    {                    
        tmpFilm.seatsTotal = Integer.parseInt(line);
        item_counter++;
        break;
    }
    ...etc...

---

我不知道这是否与问题有关，但您需要将

中断开关中每个代码序列后的code>语句。否则，如果说
item\u 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，等等。
我不知道这是否与问题有关，但您需要将
中断开关中每个代码序列后的code>语句。否则，如果说
item\u counter
为0，它将执行0的代码，然后执行1的代码，然后执行2的代码，以此类推。
试试这个

BufferedReader bufferedReaderF = new BufferedReader(new FileReader(new File(fileName)));  
line = bufferedReaderF.readLine();
 while (line != null)
                {
                    Film tmpFilm = new Film();

                    switch (item_counter)
                    {
                        case 0:
                        {
                           // line = bufferedReaderF.readLine();
                            tmpFilm.name = line;
                            item_counter++;
                            break;
                        }
                        case 1:
                        {
                            readInt=Integer.parseInt(line);
                            tmpFilm.seatsTotal = readInt;
                            item_counter++;
                            break;
                        }
                        case 2:
                        {
                            readInt = Integer.parseInt(line);
                            tmpFilm.seatsAvailable = readInt;
                            item_counter++;
                            break;
                        }
                        case 3:
                        {
                            readFloat=Float.parseFloat(line);
                            tmpFilm.price = readFloat;
                            item_counter++;
                            break;
                        }
                        case 4:
                        {
                            readFloat=Float.parseFloat(line);
                            tmpFilm.showingTime = readFloat;
                            item_counter++;
                            break;
                        }
                        case 5:
                        {
                            line=line.replaceAll("\\D","");
                            readInt = Integer.parseInt(line);
                            tmpFilm.day = readInt;
                            item_counter++;
                            break;
                        }
                        case 6:
                        {
                            readInt = Integer.parseInt(GregorianCalendar.class.getField(line.toUpperCase()).get(line))+1;
                            tmpFilm.month = readInt;
                            item_counter++;
                            break;
                        }
                        case 7:
                        {
                            readInt = Integer.parseInt(line);
                            tmpFilm.year = readInt;
                            item_counter = 0;                   
                        }
                    }

                    line = bufferedReaderF.readLine();

                    server.filmList.add(tmpFilm);

                }

试试这个

BufferedReader bufferedReaderF = new BufferedReader(new FileReader(new File(fileName)));  
line = bufferedReaderF.readLine();
 while (line != null)
                {
                    Film tmpFilm = new Film();

                    switch (item_counter)
                    {
                        case 0:
                        {
                           // line = bufferedReaderF.readLine();
                            tmpFilm.name = line;
                            item_counter++;
                            break;
                        }
                        case 1:
                        {
                            readInt=Integer.parseInt(line);
                            tmpFilm.seatsTotal = readInt;
                            item_counter++;
                            break;
                        }
                        case 2:
                        {
                            readInt = Integer.parseInt(line);
                            tmpFilm.seatsAvailable = readInt;
                            item_counter++;
                            break;
                        }
                        case 3:
                        {
                            readFloat=Float.parseFloat(line);
                            tmpFilm.price = readFloat;
                            item_counter++;
                            break;
                        }
                        case 4:
                        {
                            readFloat=Float.parseFloat(line);
                            tmpFilm.showingTime = readFloat;
                            item_counter++;
                            break;
                        }
                        case 5:
                        {
                            line=line.replaceAll("\\D","");
                            readInt = Integer.parseInt(line);
                            tmpFilm.day = readInt;
                            item_counter++;
                            break;
                        }
                        case 6:
                        {
                            readInt = Integer.parseInt(GregorianCalendar.class.getField(line.toUpperCase()).get(line))+1;
                            tmpFilm.month = readInt;
                            item_counter++;
                            break;
                        }
                        case 7:
                        {
                            readInt = Integer.parseInt(line);
                            tmpFilm.year = readInt;
                            item_counter = 0;                   
                        }
                    }

                    line = bufferedReaderF.readLine();

                    server.filmList.add(tmpFilm);

                }

你确定该文件不是空的吗？你确定该文件不是空的吗？底线不可编译，它需要是
，而（（line=bufferedReaderF.readLine（））！=null）{….}
@JimGarrison-他的变量名是“bufferedReaderF”。我已经恢复了编辑；然而，这个答案似乎并没有解决实际问题。编辑建议，如果不加上删除循环末尾的额外读取，将导致跳过备用输入行。我已尝试进行这些更改，但不幸的是，在某些情况下仍然无法工作reason@JimGarrison-在进行相关编辑之前给出了答案…同时，由于我在中的要求，进行了相关编辑回答..底线没有编译，它需要
而（（line=bufferedReaderF.readLine（））！=null）{..}
@JimGarrison-他的变量名是“bufferedReaderF”。我已经恢复了编辑；然而，这个答案似乎并没有解决实际问题。编辑建议，如果不加上删除循环末尾的额外读取，将导致跳过备用输入行。我已尝试进行这些更改，但不幸的是，在某些情况下仍然无法工作reason@JimGarrison-在进行相关编辑之前给出了答案…同时，由于我在中的要求，进行了相关编辑回答..谢谢你指出这一点-我现在已经解决了，但不是问题的根源-谢谢你指出这一点-我现在已经解决了，但不是问题的根源