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javaarraysmatrixmultidimensional-array

Printing out a 2D array in matrix format

How can I print out a simple int[][] in the matrix box format like the format in which we handwrite matrices in. A simple run of loops doesn't apparently work. If it helps I'm trying to compile this code in a linux ssh terminal.

for (int i = 0; i < rows; i++) {
    for (int j = 0; j < cols; j++) {
        System.out.println(matrix[i][j] + " ");
    }
    System.out.println();
}
Solution 
  • final int[][] matrix = {
  { 1, 2, 3 },
  { 4, 5, 6 },
  { 7, 8, 9 }
};

for (int i = 0; i < matrix.length; i++) {
    for (int j = 0; j < matrix[i].length; j++) {
        System.out.print(matrix[i][j] + " ");
    }
    System.out.println();
}

    Produces:

    1 2 3
4 5 6
7 8 9