Question

我正在尝试将我用C＃编写的方法转换为适用于Android的Java。

以下编码是我试图从C＃转换为Java：

public Map()
{
    string line;
    int maxRowLevels, maxColLevels;

    StreamReader file;
    file = File.OpenText("map.txt");

    line = file.ReadLine();
    line = file.ReadLine();
    maxRowLevels = System.Convert.ToInt32(line) - 1;

    line = file.ReadLine();
    line = file.ReadLine();    
    maxColLevels = System.Convert.ToInt32(line) - 1;

    line = file.ReadLine();

    map = new char[maxRowLevels+1,maxColLevels+1,screenRows,screenCols];

    for (int rowCurrentLevel = 0; rowCurrentLevel<=maxRowLevels; rowCurrentLevel++)
    {
        for (int currentRow = 0; currentRow<screenRows; currentRow++)
        {
            line = file.ReadLine();
            for (int colCurrentLevel = 0; colCurrentLevel<=maxColLevels; colCurrentLevel++)
            {
                for (int currentCol = 0; currentCol<screenCols; currentCol++)
                {
                    map[rowCurrentLevel, colCurrentLevel,currentRow, currentCol] = line[colCurrentLevel*screenCols + currentCol];
                }
            }
        }          
    }
    file.Close();    
}

我尝试转换的代码如下：

public Map(Context context)
{
    String line;
    int maxRowLevels, maxColLevels;
    int maxRowLevels, maxColLevels;

    InputStream inputFile;
    BufferedReader file;

    inputFile = context.getAssets().open("map.txt");
    file = new BufferedReader(new InputStreamReader(inputFile, "UTF-8"));

    line = file.readLine();
    line = file.readLine();
    maxRowLevels = Integer.parseInt(line)-1;

    line = file.readLine();
    line = file.readLine();     
    maxColLevels = Integer.parseInt(line)-1;

    line = file.readLine();

    mapa = new char[maxRowLevels+1][maxColLevels+1][screenRows][screenCols];

    for (int rowCurrentLevel = 0; rowCurrentLevel<=maxRowLevels; rowCurrentLevel++)
    {
        for (int currentRow = 0; currentRow<screenRows; currentRow++)
        {
            line = file.readLine();
            for (int colCurrentLevel = 0; colCurrentLevel<=maxColLevels; colCurrentLevel++)
            {
                for (int currentCol = 0; currentCol<screenCols; currentCol++)
                {
                    mapa[rowCurrentLevel][colCurrentLevel][currentRow][currentCol] = line[colCurrentLevel*screenCols + currentCol];
                }
            }
        }          
    }
    inputFile.close();
    file.close();
}

似乎一切都是正确的，除了这行丢弃了这个错误：“表达式的类型必须是数组类型字符串但它已解析为字符串”

mapa[rowCurrentLevel][colCurrentLevel][currentRow][currentCol] = line[colCurrentLevel*screenCols + currentCol];

谁能告诉我如何修复它？我认为这将是愚蠢的，原谅我，但我是Java的初学者。

提前致谢。

Answer 1

你没有说它在哪里，但我打赌它在这里......

line[colCurrentLevel*screenCols + currentCol]

哪个应该使用String's charAt()，因为Java中的行不被视为char数组...

line.charAt(colCurrentLevel*screenCols + currentCol)

Answer 2

我认为问题是在java中String类不支持[]运算符访问特定的char，因此您需要调用line.charAt(colCurrentLevel*screenCols + currentCol)而不是line[colCurrentLevel*screenCols + currentCol]

Answer 3

您无法使用[]访问字符串中的字符请改用line.charAt(colCurrentLevel*screenCols + currentCol);

尝试将代码块从C＃转换为Java（Android）

3 个答案: