@Override
    public boolean equals(Object obj) {
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        final RealObject other = (RealObject) obj;
        if (Double.doubleToLongBits(this._value) != Double.doubleToLongBits(other._value)) {
            return false;
        }
        return true;
    }