MosaicImage.java

public class MosaicImage {
    public static void main(String args[]) {
        double canvasH = 720;
        int totalHorizontalSquare = 204;
        int totalVerticalSquare = 264;
        int lengthW = 21;
        int lengthH = 21;
        int totalHorizontalBig_sq = 10;


        double canvasW = totalHorizontalSquare * canvasH / totalVerticalSquare;
        StdDraw.setCanvasSize((int) canvasW, (int) canvasH);
        StdDraw.setXscale(0, canvasW);
        StdDraw.setYscale(0, canvasH);

        double sq_W = canvasH / totalVerticalSquare;
        double x0 = sq_W / 2, y0 = canvasH - sq_W / 2;


        int c = -1;

        while (!StdIn.isEmpty()) {
            String s = StdIn.readString();
            c++;
            String[] strings = new String[lengthH];
            for (int i = 0; i < lengthH; i++) {
                strings[i] = StdIn.readString();
            }

            double x = x0 + lengthW * (c % totalHorizontalBig_sq) * sq_W;
            int cc = c / totalHorizontalBig_sq;
            double y = y0 - lengthH * cc * sq_W;
            draw(strings, x, y, sq_W);
        }

    }

    public static void draw(String[] strings, double x, double y, double sq_W) {
        for (int i = 0; i < strings.length; i++) {
            for (int j = 0; j < strings[i].length(); j++) {
                if (strings[i].charAt(j) == 'W') StdDraw.setPenColor(StdDraw.WHITE);
                else if (strings[i].charAt(j) == 'B') StdDraw.setPenColor(StdDraw.BLACK);
                else if (strings[i].charAt(j) == 'O') StdDraw.setPenColor(StdDraw.ORANGE);
                else if (strings[i].charAt(j) == 'R') StdDraw.setPenColor(StdDraw.RED);
                else if (strings[i].charAt(j) == 'G') StdDraw.setPenColor(StdDraw.GREEN);
                else if (strings[i].charAt(j) == 'Y') StdDraw.setPenColor(StdDraw.YELLOW);
                if (strings[i].charAt(j) != 'W')
                    StdDraw.filledSquare(x + j * sq_W, y - i * sq_W, sq_W / 2);
            }
        }
    }
}