Question

I’m just checking if a value of a double variable is null or not, strangely, an error
raised saying “operator == is undefined for double”?

Code:

public double getGyro_X() {
    if (this.gyro_X == null) {
        Toast.makeText(this, ""+gyro_XIsNullText, ToastdurationShort).show();
    } else {
    return this.gyro_X;
    }
}

Answer 1

Then its of type double and not of type Double.. and double cannot be null