我正在尝试从文本文件中获取2D数组。到目前为止,我访问了该文件并获得了文件中的所有数字,但所有这些数字都是字符串,所以我使用了split((,然后将其转换为double。如何将其转换为双2D阵列?
1.65 4.50 2.36 7.45 3.44 6.23
2.22-3.24-1.66-5.48 3.46
4.23 2.29 5.29
2.76 3.76 4.29 5.48 3.43
3.38 3.65 3.76
2.46 3.34 2.38 8.26 5.34
这就是我目前所拥有的:
public static void main(String[] a) throws FileNotFoundException {
File file = new File("district3.txt");
Scanner scan = new Scanner(file);
String b;
String[] c;
int r = 6;
double[][]arr = new double[r][];
while(scan.hasNextLine()) {
//get number as String
b = scan.nextLine();
//split them
c = b.split(" ");
for(String i:c)
System.out.println(Double.parseDouble(i) );
}
}
将for
更改为print
内联,然后在打印完所有数字后添加一个println
:
for(String i:c)
System.out.print(i + " ");
System.out.println()
要存储数字,您可以执行以下操作:
double[][]arr = new double[r][];
int i = 0;
while(scan.hasNextLine()) {
//get number as String
b = scan.nextLine();
//split them
c = b.split(" ");
arr[i] = new double[c.length];
for(int j = 0; j < c.length; ++j) {
arr[i][j] = Double.parseDouble(c[j]);
// Display them if needed
System.out.print(c[j] + " ");
}
System.out.println();
++i;
}