將文本文件讀取到2D數組JAVA中

Question

我正在嘗試讀取給定的文本文件，其中包含一堆雙打，文本文件看起來像這樣（每行之間沒有空格）：

0，0.007133248，0.003747135，0.0034464097，0.009517824，0.0036065334，0.007921185，0.0041013476

1，0.006223865，5.804103E-4，5.6967576E-4，0.008850083，0.003269921，3.7322243E-4，0.0011008179

2，0.0051101227，0.008973722，0.0013274436，0.00922496，0.0050817304，0.004631279，0.0069321943

本質上是1000行8列，並且試圖將其轉換為data [1000] [8]的二維數組，但是在遍歷數據時遇到了麻煩。 這是我到目前為止所擁有的，任何幫助將不勝感激！

  public static void readFile2() throws IOException{

    Double[][] data = new Double[1000][8];
    int row = 0;
    int col = 0;
    Scanner scanner = null;
    scanner = new Scanner(new BufferedReader(new FileReader("/Users/Roman/Documents/workspace/cisc124/Logger (1).csv")));

    while (scanner.hasNext() && scanner !=null) {
        scanner.useDelimiter(",");
        while(row<data.length && col<8){
        data[row][col] = Double.parseDouble(scanner.next());
        col++;
        //System.out.print(Arrays.deepToString(data));

    }
    col=0;
    row++;
    }
    System.out.println(Arrays.deepToString(data));
    scanner.close();
}

Answer 1

逐行讀取文件會更方便。

String[] data = new String[1000];
int row = 0;
try {
    BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(filePath), "utf-8"));         

    String line;
    while ((line = br.readLine()) != null) {
        data[row]= line;
        row++;
    }
    br.close();

} catch (IOException e) {
    e.printStackTrace();
}

最后做同樣的事情

System.out.println(Arrays.ToString(data));

或者如果您需要給定索引處的元素，則拆分一行並使用Double.parse();