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androidkotlinkotlin-null-safety

How can I declare null array in Kotlin?

I have the following code in PHP public static $bitValueTable = null; and I want to convert it into Kotlin. My variable is a null array in the first step but I add some value after the program runs. how can I convert?

Solution

  • In kotlin you can use nullable objects with the secure call operator "?". Now, you have a static variable in PHP, in kotlin there is no "static" as such, however the companion object {} fulfills the same function. In this way the equivalent of public static $bitValueTable = null; in kotlin is: companion object { var bitValueTable : Array<Type>? = null }

    Obs:

    • The default value of the variables in kotlin is public