Assign split string to parsed int

问题

i'm getting this error and i can't quite figure out how to fix it.

error:
incompatible types
found : int
required: int[]

array[x] = Integer.parseInt(elements[0]);

here is the code for my method. The file being used is a text file of 1000 numbers, 2 per line with 500 lines, separated by commas.

Example:

1,2
16,92
109,7

the purpose of this block is to read all lines of the text file, and assign all numbers to the 2d integer array.

public static int[][] writeTypes(){
    String position;
    String[] elements = new String[2];
    int x;
    int y=1;
    int array[][] = new int[500][2];
    File TypesFile = new File("Types.txt");

    try {
        Scanner twoput = new Scanner(pkTypesFile);
        for(x = 0; twoput.hasNext(); x++){
            position = twoput.nextLine();
            elements = position.split(",", 2);

            array[x] = Integer.parseInt(elements[0]); 
            array[x][y] = Integer.parseInt(elements[1]);

            System.out.println(array[x] + " " + array[x][y]);
        }
    } catch (Exception e) {
        System.err.format("Types File does not exist.\n");
    }
    return array;
}

回答1:

You seem to be confused about indexing into multidimensional arrays. array is a 2-dimensional array, meaning it's an array of arrays. new int[500][2] creates an array of length 500, each element of which is an int[] of length 2, each element of which is an int. The expression array[x] selects one of the 500 int[] arrays of length 2. The compile error is saying you can't assign an int to an int[]. You need to provide another index to select one of the ints in the array denoted by array[x].

Specifically, you should change

array[x] = Integer.parseInt(elements[0]); 
array[x][y] = Integer.parseInt(elements[1]);
System.out.println(array[x] + " " + array[x][y]);

array[x][0] = Integer.parseInt(elements[0]); 
array[x][1] = Integer.parseInt(elements[1]);
System.out.println(array[x][0] + " " + array[x][1]);

The second index selects one of the ints in the int[], which you can then assign to.

来源：https://stackoverflow.com/questions/20585675/assign-split-string-to-parsed-int

标签

java

arrays

string

int

parseint