@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((x == null) ? 0 : x.hashCode());
result = prime * result + ((y == null) ? 0 : y.hashCode());
return result;
}
@Override
public int hashCode() {
return a.hashCode() + 31 * b.hashCode();
}
@Override
public int hashCode() {
int result = x != null ? x.hashCode() : 0;
result = 31 * result + (y != null ? y.hashCode() : 0);
return result;
}
