java - 我需要一个文件阅读器来逐行读取文本文件并用 Java 格式化它们

Question

我有一个文本文件，格式如下:

Han Solo:1000
Harry:100
Ron:10
Yoda:0

我需要创建一个对象数组列表，将玩家的名字 (Han Solo) 和他们的分数 (1000) 作为属性存储。我希望能够通过逐行读取文件并拆分字符串以获得所需的属性来制作此 arrayList。 我尝试使用 Scanner 对象，但效果不佳。在此方面的任何帮助将不胜感激，谢谢。

Answer 1

你可以有一个像这样的 Player 类:-

class Player { // Class which holds the player data
    private String name;
    private int score;

    public Player(String name, int score) {
        this.name = name;
        this.score = score;
    }

    // Getters & Setters
    // Overrride toString()  - I did this. Its optional though.
}

您可以解析包含如下数据的文件:-

List<Player> players = new ArrayList<Player>();
try {
    BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream("input.txt"))); // I used BufferedReader instead of a Scanner
    String line = null;
    while ((line = br.readLine()) != null) {
        String[] values = line.split(":"); // Split on ":"
        players.add(new Player(values[0], Integer.parseInt(values[1]))); // Create a new Player object with the values extract and add it to the list
    }
} catch (IOException ioe) {
    // Exception Handling
}
System.out.println(players); // Just printing the list. toString() method of Player class is called.