RosettaCodeData/Task/Bitmap-Midpoint-circle-algorithm/Java/bitmap-midpoint-circle-algorithm.java

import java.awt.Color;

public class MidPointCircle {
   private BasicBitmapStorage image;

   public MidPointCircle(final int imageWidth, final int imageHeight) {
      this.image = new BasicBitmapStorage(imageWidth, imageHeight);
   }

   private void drawCircle(final int centerX, final int centerY, final int radius) {
      int d = (5 - radius * 4)/4;
      int x = 0;
      int y = radius;
      Color circleColor = Color.white;

      do {
         image.setPixel(centerX + x, centerY + y, circleColor);
         image.setPixel(centerX + x, centerY - y, circleColor);
         image.setPixel(centerX - x, centerY + y, circleColor);
         image.setPixel(centerX - x, centerY - y, circleColor);
         image.setPixel(centerX + y, centerY + x, circleColor);
         image.setPixel(centerX + y, centerY - x, circleColor);
         image.setPixel(centerX - y, centerY + x, circleColor);
         image.setPixel(centerX - y, centerY - x, circleColor);
         if (d < 0) {
            d += 2 * x + 1;
         } else {
            d += 2 * (x - y) + 1;
            y--;
         }
         x++;
      } while (x <= y);

   }
}