如何从文本文件数据填充 2D 数组

Question

我正在尝试用文本文件中的数据填充二维数组。下面是文本文件：

Newfoundland and Labrador     545.3     540.9     537.9     533.8     531.6
Prince Edward Island          136.9     137.8     138.3     138.9     139.9
Nova Scotia                   936.1     941.2     942.3     942.9     944.8
New Brunswick                 753.3     755.5     755.6     756       756.7
Quebec                        7323.6    7351.2    7381.8    7417.7    7455.2
Ontario                       11387.4   11527.9   11697.6   11894.9   12068.3
Manitoba                      1137.9    1142.5    1146.4    1149.1    1150.8
Saskatchewan                  1024.9    1025.6    1022      1017.1    1011.8
Alberta                       2906.8    2959.6    3009.9    3059.1    3113.6
British Columbia              3997.1    4028.3    4060.1    4101.6    4141.3
Yukon                         31.5      31.1      30.6      30.2      29.9
Northwest Territories         41.1      41        40.8      41.2      41.4 
Nunavut                       26.4      26.9      27.5      28.1      28.7

这是我的代码：

double year[] [] = new year [13] [5];
BufferedReader x = new BufferedReader (new FileReader ("populationByProvnices.txt"));

我正在尝试用上面文本文件中的数字填充年份数组，谢谢:D

Answer 1

可以使用缓冲读取器和嵌套 for 循环的组合从文本文件填充二维数组。像这样的东西就可以了：

        BufferedReader bf = new BufferedReader (new FileReader (new File ("populationByProvinces.txt")));
        provinceList = new ArrayList ();
        year = new double [13] [5];
        String line = "";
        for (int x = 0 ; x <= 12 ; x++)
        {
            line = bf.readLine ();
            provinceList.add (line);
            for (int y = 0 ; y <= 4 ; y++)
            {
                year [x] [y] = Double.parseDouble ((line.substring ((y * 10 + 30), (y * 10 + 38))));
            }
        }
        bf.close ();