public void removeNearestCircle(int x1, int y1) {
Circle circ;
double minDist = Double.MAX_VALUE;
int minDisIndex = -1;
for (int i = 0; i < circles.size(); i++) {
circ = (Circle) (circles.get(i));
if (circ.distanceTo(x1, y1) < minDist) {
minDist = circ.distanceTo(x1, y1);
minDisIndex = i;
}
}
if (minDisIndex >= 0 && minDist < 300) {
circles.removeElementAt(minDisIndex);
}
}