[英]How to fill 2D array from text file data
我正在尝试用文本文件中的数据填充二维数组。 这是文本文件:
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"));
我想用上面的文本文件中的数字填充年份数组,谢谢你:D
您可以通过结合使用bufferedreader和嵌套的for循环从文本文件填充2d数组。 这样的事情将达到目的:
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 ();
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