Buffered Writer不从ArrayList写入txt文件

Question

我有一点麻烦让BufferedWriter将输出写入我有的txt文件。

当我编译程序时，我没有收到任何错误，但txt文件到达我的项目空白。

我在这里看过类似的问题并尝试了一些建议的解决方案来解决它而没有成功，比如关闭流等

public void storeToDoItemsOntoTxtFile () throws IOException {

    Path path = Paths.get(fileName);
    BufferedWriter buffyWriter = Files.newBufferedWriter(path);

    try {
        Iterator<ToDoItem> bigIterator = toDoItems.iterator();
        while (bigIterator.hasNext()) {
            ToDoItem item = bigIterator.next();
            buffyWriter.write(String.format("%s\t%S\t%s", item.getShortDescription(), item.getDetails(), item.getDeadline().format(formatter)));
        buffyWriter.newLine();
        }

    } finally {
        if (buffyWriter !=null) {
            buffyWriter.close();// when we are done working with the writer
        }
    }

}

  

的BufferedReader

public void loadToDoItemsFromTxtFile() throws IOException {


    toDoItems = FXCollections.observableArrayList();
    Path path = Paths.get(fileName);
    BufferedReader buffyReader = Files.newBufferedReader(path); 


    String buffyInput;

    try {

        while ((buffyInput = buffyReader.readLine()) !=null) {

            String [] itemPieces = buffyInput.split("\t");

            String shortDescription = itemPieces[0]; 
            String details = itemPieces[1]; // 
            String dateString = itemPieces [2];

            LocalDate date = LocalDate.parse(dateString, formatter);
            ToDoItem toDoItem = new ToDoItem(shortDescription,details,date); 
            toDoItems.add(toDoItem);
        }



    } finally {
        if (buffyReader != null) {// ie the buffy reader states that there is a toDoItem" in the txt file
            buffyReader.close();
        }
    }
}