Want to print out a matrix in a comma separated text file, but this code will print out matrix with all zeroes which is not the matrix in the text file .
public int[][] readFromFile() throws FileNotFoundException {
Scanner in = new Scanner(new File("C:\\Users\\Aidan\\Documents\\NetBeansProjects\\matrix\\src\\matrix\\newfile"));
int[][] a = new int[9][9];
while (in.hasNext()) {
String word = in.next();
if (word.equals(",")) {
continue;
}
System.out.println(word);
int x = 0;
int y = 0;
//System.out.println(Integer.parseInt(word));
int s = Integer.parseInt(word);
a[x++][y++] = s;
}
return a;
}
Assuming you have multiple lines in your csv file:
1,2,3,4,5,6,7,8,9
2,3,4,5,6,7,8,9,1
3,4,5,6,7,8,9,1,2
...
You should be able to do something like the following:
int[][] a = new int[9][9];
Scanner in = new Scanner(new File("C:\..."));
for (int i = 0; i < 9; i++) {
String[] line = in.nextLine().split(",");
for (int j = 0; j < 9; j++) {
a[i][j] = Integer.parseInt(line[j]);
}
}
This is the bare minimum, and includes no error checking, if a line in your csv has less than 9 comma separated numbers, the program will crash.
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