how to check double value is empty or not

Question

i'm trying to get Double value from json, i want to ask how to check double value is empty or not?

this is how i initial it private static

final String kartu_xcord = "xcord";
    private static final String kartu_ycord = "ycord";
    ouble xcord,ycord;

this is how i parse my json:

xcord = c.getDouble(kartu_xcord);
ycord = c.getDouble(kartu_ycord);

this is how i try to check xcord is null or empty :

if (xcord.isNaN()) {
            LinlayNoMap.setVisibility(View.VISIBLE);
        } else {
            linlaymap.setVisibility(View.VISIBLE);
}

i hope someone can help me to solve my proble thank you

Answer 1

In java double is a primitive type which can not be null, There is Double wrapper class in java which can be checked as null.

Declare your coords of type Double not double and check if Double value is null.

Answer 2

In Java double cannot be null.

Answer 3

It can't be null or empty. It's a double value. Maybe try the Double wrapper?