How to pass parseInt array to previous array?

Question

I've been asked to read a file and take the text in there and convert them to a 2d array. Since Eclipse is a pain and wont open/read my text file, I made a test in the class that uses an individually initialized 2d array. My problem is that I don't know to put the parseInt'ed array back into the new one. Or how to use that to form a new 2d array. Here's my code: public static void main(String[] args) {

    String[][] tester = new String[][] { { "-1 2 3 0" }, { "-1 3 4 0" }, { "-1 3 -4 0" }, { "-1 -3 4 0" } };

    int row = 0;
    int col = 0;
    int count = 0;
    int[][] formula = new int[4][];

    while (count < 4) {
        String temp = tester[row][col];
        String[] charArray = temp.split("\\s+");
        int[] line = new int[charArray.length];

        for (int i = 0; i < charArray.length; i++) {
            String numAsStr = charArray[i];
            line[i] = Integer.parseInt(numAsStr);
            //what to do here??
        }

        row++;
        count++;

    }

    System.out.println(Arrays.deepToString(formula).replace("], ",
     "]\n"));
}
}

I want to generate an array that reads like this:

-1 2 3 0

-1 3 4 0

-1 3 -4 0

-1 -3 4 0

How can I accomplish this?

Answer 1

Change the definition of formula like this:

int[][] formula = new int[tester.length][];

You want the formula to have the same number of rows as the tester, right?

Also change your while loop to loop until tester.length instead of a constant 4:

while (counter < tester.length)

Now, after the for loop is where the real business begins:

for (int i = 0; i < charArray.length; i++) {
    String numAsStr = charArray[i];
    line[i] = Integer.parseInt(numAsStr);
}
formula[row] = line; // <------------

During the for loop, you've parsed all the integers in one row of the tester. Now it is time to put the row of integers into formula, isn't it?