Long term NaN
I have a case where I only need to pass non-null values and not empty strings to the repository.
For strings, I kept the constant "NULL_VALUE", for Double and Float, I use NaN.
Similarly, there is a way to store some value for Long, Integer and Boolean
public static void main(String... args) {
Float fVal = Float.NaN;
System.out.println("Float NaN :" + fVal);
Double dVal = Double.NaN;
System.out.println("Double NaN :" + dVal);
// Integer iVal = Integer.NaN;
// System.out.println("Integer NaN :" + iVal);
// Boolean boolVal = Boolean.NaB; // Not a boolean
}
I am afraid to keep 0 or a large slice (999999999 for int).
What's the best way?
if I understand your question correctly, you don't want to store the values null
in your database.
By default for objects like Float
, Boolean
etc., null
you will have to fall back to the default values of the corresponding primitives, for example: 0.0f
for Float
, false
for Boolean
, etc.
Another approach would be to define your own default values. As you said, "NULL_VALUE"
it String
may not be that bad for, as there is no alternative.