从外部.txt文件导入控制台时不同的值

Question

我从.txt文件中引入值并将它们放入数组中，但最终存储在数组中的数字与文件中的值不同，我不知道为什么以及如何修复它。

文本文件是用以下值排列的

2
20.0
10.0
100

将值导入文件的方法是：

//variables global to the class
    public static int level; 
    public static int hp; 
    public static double vigor; 
    public static double intelligence; 

public static void checkSaveState() throws IOException 
    {
        //this method checks the save file for data
        try
        {
            double[] savedGa = new double[4];
            BufferedReader saveFile = new BufferedReader(new FileReader("HRHeroSaveGame.txt"));
            for (int i = 0; i < 4; i++)
            {
                savedGa[i] = saveFile.read();
            }
            level = (int) savedGa[0];
            vigor = savedGa[1];
            intelligence = savedGa[2];
            hp = (int) savedGa[3];

            System.out.println("Level: " + level + " Vigor: " + vigor + " Intelligence: " + intelligence + " HP: " + hp);
        } catch (FileNotFoundException e) {
            System.out.println("Sorry, a save file couldn't be found for you.");
        }

    }

输出结果总是这样：

Level: 50 Vigor: 13.0 Intelligence: 10.0 HP: 50

如果这与此相关，这就是创建文件的方法。

public static void saveGame() throws IOException
{
    PrintWriter saveFile = new PrintWriter( new FileWriter("HRHeroSaveGame.txt"));
    saveFile.println(level);
    saveFile.println(vigor);
    saveFile.println(intelligence);
    saveFile.println(hp);
    saveFile.close();
}

Answer 1

read()只读取一个字符。这解释了您的结果：'2' = 50，'\r' = 13，'\n' = 10

您必须将每一行读入为String，并对其进行解析以获得加倍：

savedGa[i] = Double.parseDouble(saveFile.readLine());

Answer 2

BufferReader的read()方法读取字符的整数表示，而不是转换为double或int的完整行。

要解决这个问题，只需将for-循环更改为

try
        {
            double[] savedGa = new double[4];
            BufferedReader saveFile = new BufferedReader(new FileReader("C:/test.txt"));
            for (int i = 0; i < 4; i++)
            {
                savedGa[i] = Double.parseDouble(saveFile.readLine());
            }
            level = (int) savedGa[0];
            vigor = savedGa[1];
            intelligence = savedGa[2];
            hp = (int) savedGa[3];

            System.out.println("Level: " + level + " Vigor: " + vigor + " Intelligence: " + intelligence + " HP: " + hp);
        } catch (FileNotFoundException e) {
            System.out.println("Sorry, a save file couldn't be found for you.");
        }

它将整行读取为字符串，然后将其解析为double。