Question

我有一个文本文件：

Description|SKU|Retail Price|Discount
Tassimo T46 Home Brewing System|43-0439-6|17999|0.30
Moto Precise Fit Rear Wiper Blade|0210919|799|0.0

我已经得到它以便我阅读所有内容，并且它完美地运行，除了它读取第一行的事实，这是.txt文件的一种传说，必须被忽略。

public static List<Item> read(File file) throws ApplicationException {
    Scanner scanner = null;
    try {
        scanner = new Scanner(file);
    } catch (FileNotFoundException e) {
        throw new ApplicationException(e);
    }

    List<Item> items = new ArrayList<Item>();

    try {
        while (scanner.hasNext()) {
            String row = scanner.nextLine();
            String[] elements = row.split("\\|");
            if (elements.length != 4) {
                throw new ApplicationException(String.format(
                        "Expected 4 elements but got %d", elements.length));
            }
            try {
                items.add(new Item(elements[0], elements[1], Integer
                        .valueOf(elements[2]), Float.valueOf(elements[3])));
            } catch (NumberFormatException e) {
                throw new ApplicationException(e);
            }
        }
    } finally {
        if (scanner != null) {
            scanner.close();
        }
    }

    return items;
}

如何使用Scanner类忽略第一行？

Answer 1

在任何处理之前简单地调用scanner.nextLine（）一次就可以了。

Answer 2

如何在您的循环外调用scanner.nextLine（）。

scanner.nextLine();//this would read the first line from the text file
 while (scanner.hasNext()) {
            String row = scanner.nextLine();

Answer 3

scanner.nextLine();
while (scanner.hasNext()) {
      String row = scanner.nextLine();
      ....

使用Scanner类时如何忽略.text的第一行

3 个答案: