我怎样才能让扫描仪搜索一个令牌，然后返回它后面的那个？

Question

我想要ArrayList<String> 中的字符串inning、battingTeam、outs、balls 和strikes。 换句话说，我需要紧跟标签@attribute 的字符串。 @relation 和 @data 以及该行后面的任何内容都不应出现在此 ArrayList 中。

@关系统计

@属性局真实

@attribute battingTeam {0,1}

@attribute 输出 {0,1,2}

@属性球{0,1,2,3}

@attribute 触发 {0,1,2}

@数据 1,0,0,0,1,"CX",0,0,"crisc001","R","crisc001","R","wilsc004","L","wilsc004","L", "","","","T","F",8,1,no

这是我的主要方法：

public static void main(String[] args) throws IOException
{
    File file = new File("2013ALL.csv");

    Scanner scanFile = new Scanner(file);
    Scanner option = new Scanner(System.in);
    ArrayList<String> headers = new ArrayList<String>();


    String line = "";

    while (!line.startsWith("@attribute"));
    {
        line = scanFile.nextLine();
    }

    do
    {
        line = scanFile.nextLine();
        String[] splitLine = line.split(" ");
        headers.add(splitLine[1]);
    }
    while (line.startsWith("@attribute"));
    System.out.println(headers);
}

Answer 1

public static void main(String[] args) throws Exception {

    List<String> headers = new ArrayList<String>();
    Scanner s = new Scanner(new File("2013ALL.csv"));
    String l = s.nextLine();
    while (s.hasNextLine() && l.startsWith("@")) {
        if (l.startsWith("@attribute")) {
            String[] splitLine = l.split(" ");
            headers.add(splitLine[1]);
        }
        l = s.nextLine();
    }

    System.out.println(headers);
}

此代码仅在@attribute 标记之后添加元素。请注意，它不会进行任何错误检查，例如在尝试访问索引 1 处的元素之前检查splitLine 的length。