I’m trying to create with java a 7×7 matrix with numbers and letters as indexes to locate each cell. To understand it better, I’m making a field for the naval battle. The problem is that I can’t align the letters with the columns in the array. Do you have any ideas? Of course, the letters are outside the matrix, so it’s a printing problem. I can’t use any kind of GUI.

System.out.print("   A B C    D    E    F     G n");
                    for (int i = 0; i < ROWS; i++) {
                        System.out.print((i + 1) + "  ");
                        for (int j = 0; j < COLUMNS; j++) {
                            System.out.print(campo[i][j] + "  ");
                        }
                        System.out.println(" " + (i + 1));
                    }
                    System.out.print("   A B C    D    E    F     G n");

I tried to write letters manually with the print function, but they are not aligned to the matrix’s columns.