Explanation of Nested Loop (very strange)

[Jonotron]

Hey, I've been programming for a long time, but I'm new to java (I know it's still very similar to others). I'm having a strange result from a board(like chess) I'm making:

Here is the variable init.

    //Board Dimensions
    public static final int WIDTH = 20;
    public static final int HEIGHT = 10;
    
    //I'm using boolean because it's either a dot or an asterisk... 
    public static boolean[][] board = new boolean[WIDTH][HEIGHT];

When I drew the board, the x and y flipped positions for some reason.
Originally I had this code:

static void drawBoard()
    {
      for (int x = 0; x < WIDTH; x++)
      {
          for (int y = 0; y < HEIGHT; y++)
          {
              if (board[x][y] == true)
              {
                  System.out.print( '*' );
              }
              else
              {
                  System.out.print( '.' );
              }   
          }
          System.out.println();
      }
    }

I was able to correct the problem by just reversing it like this:

static void drawBoard()
    {
        //HAVE TO START WITH COLUMN AND INVERSE THE X Y
      for (int x = 0; x < HEIGHT; x++)
      {
          for (int y = 0; y < WIDTH; y++)
          {
              if (board[y][x] == true) //NEED TO INVERT X AND Y TO MAKE WORK
              {
                  System.out.print( '*' );
              }
              else
              {
                  System.out.print( '.' );
              }   
          }
          System.out.println();
      }
    }

And the desired output should be similar to "Conway's Game of Life" as this is supposed to be a replica.

[collin389]

Hello, in your first for loop, you print the heights and then make a new line, and then print the next column, I think what you want to do is print the entire width then make a newline, and then print the next widths. Like this:

 static void drawBoard()
    {
      for (int y = 0; y < HEIGHT; y++)
      {
          for (int x = 0; x < WIDTH; x++)
          {
              if (board[x][y] == true)
              {
                  System.out.print( '*' );
              }
              else
              {
                  System.out.print( '.' );
              }   
          }
          System.out.println();
      }
    }

[Jonotron]

Oh wow, now that I think about it, that makes so much more sense. Thanks a lot!

[collin389]

Glad I could help.:)

[Singing Boyo]

I'm really starting to get annoyed by these ad posts... reported.

[Fubarable]

and deleted. Thanks.