Solved circle generation has gaps?

Code:java

 
 
int locX = player.getLocation().getBlockX();
int locY = player.getLocation().getBlockY();
int locZ = player.getLocation().getBlockZ();
int radius = Integer.parseInt(args[0]);
       int x, z, r2;
 
       r2 = radius * radius;
       player.getWorld().getBlockAt(locX,locY, locZ + radius).setType(Material.STONE);
       player.getWorld().getBlockAt(locX,locY, locZ - radius).setType(Material.STONE);
       for (x = 1; x <= radius; x++) {
           z = (int) (Math.sqrt(r2 - x*x) + 0.5);
           player.getWorld().getBlockAt(locX + x,locY, locZ + z).setType(Material.STONE);
           player.getWorld().getBlockAt(locX + x,locY, locZ - z).setType(Material.STONE);
           player.getWorld().getBlockAt(locX - x,locY, locZ + z).setType(Material.STONE);
           player.getWorld().getBlockAt(locX - x,locY, locZ - z).setType(Material.STONE);
       }

 

Code:java

for (int y = startY; y < startY + height; y++) {
            if (currentX >= currentZ) {
                f = 1 - radius;
                ddF_x = 1;
                ddF_y = -2 * radius;
                currentX = 0;
                currentZ = radius;
                locations.add(new Location(start.getWorld(), startX, y, startZ + radius));
                locations.add(new Location(start.getWorld(), startX, y, startZ - radius));
                locations.add(new Location(start.getWorld(), startX + radius, y, startZ));
                locations.add(new Location(start.getWorld(), startX - radius, y, startZ));
            }
            while (currentX < currentZ) {
                if (f >= 0) {
                    currentZ--;
                    ddF_y += 2;
                    f += ddF_y;
                }
                currentX++;
                ddF_x += 2;
                f += ddF_x;
                locations.add(new Location(start.getWorld(), startX + currentX, y, startZ + currentZ));
                locations.add(new Location(start.getWorld(), startX - currentX, y, startZ + currentZ));
                locations.add(new Location(start.getWorld(), startX + currentX, y, startZ - currentZ));
                locations.add(new Location(start.getWorld(), startX - currentX, y, startZ - currentZ));
                locations.add(new Location(start.getWorld(), startX + currentZ, y, startZ + currentX));
                locations.add(new Location(start.getWorld(), startX - currentZ, y, startZ + currentX));
                locations.add(new Location(start.getWorld(), startX + currentZ, y, startZ - currentX));
                locations.add(new Location(start.getWorld(), startX - currentZ, y, startZ - currentX));
              }
        }

Not a clue about your problem, but here's mine you can rip apart
It was taken from http://en.wikipedia.org/wiki/Midpoint_circle_algorithm