Two Dimensional Arrays

[Ryan Perlman]

This is for school: so just point me in the right direction.
I have a filter the flips an image horizontaly

public void filter(PixelImage pi) {
        Pixel[][] data = pi.getData();
        //for each row, swap its contents from left to right
        for (int row = 0; row < pi.getHeight(); row++) {
            for (int col = 0; col < pi.getWidth() / 2; col++) {
                // given a column: i, its pair is column: width() - i - 1
                // e.g. with a width of 10
                // column 0 is paired with column 9
                // column 1 is paired with column 8 etc.
                Pixel temp = data[row][col];
                data[row][col] = data[row][pi.getWidth() - col - 1];
                data[row][pi.getWidth() - col - 1] = temp;
            }
        }
        pi.setData(data);
        
    }

But now I am trying to turn this into a method that flips the image Vertically.
Please put me in the right path
Confused

[ April 04, 2002: Message edited by: Ryan Perlman ]

[Dirk Schreckmann]

This "flips the two dimensional array vertically":

class DeleteMe {
    
    public static void main(String args[]) {
        
        char[][] array = { {'a', 'b', 'c', 'd'}, 
                           {'e', 'f', 'g', 'h'}, 
                           {'i', 'j', 'k', 'l'}, 
                           {'m', 'n', 'o', 'p'} };
        
        array = flipVertically(array);
        
        for (int row = 0; row < array.length; row++) {
            
            for (int column = 0; column < array[0].length; column++) {
                
                System.out.print(array[row][column]);
                
            }
            
            System.out.println("");
            
        }
        
}
    
    static char[][] flipVertically(char[][] array) {
        
        char[][] temp = new char[array.length][array[0].length];
        
        for (int row = 0; row < temp.length; row++) {
            
            temp[row] = array[array.length - row - 1];
            
        }
        
        return temp;
        
    }
    
}

Any questions?
Good Luck.