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Questions tagged [non-nullable]

232 questions
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disable @Nonnull annotation on "implement methods"

IntelliJ is adding @Nonnull annotations on code generated via the implement methods feature. How to prevent IntelliJ from annotating signatures with that annotation? IntelliJ 2019.1 Thanks
beluchin
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Enterprise Architect - how to extract nullability of a database table column?

I have a database table defined in EA. In this table I have a column where NULL is allowed. When I use a script or an API to extract nullability from this column, I understand this should be done using the LowerBound and UpperBound values. When…
Ruudjah
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Android Nullbale and NonNull: Method invocation 'getSearchableInfo' may produce 'NullPointerException'

I have below code snippet but it shows warnings Method invocation 'getSearchableInfo' may produce 'NullPointerException' ComponentName s = getComponentName(); if (s ==null) return; @NonNull ComponentName componentName =…
VSB
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Multiple @EnsuresNonNullIf should be ok; but the compiler complains

The manual of the Checker Framework claims "You can write multiple @EnsuresNonNullIf annotations on a single method", however I observe the following message if I try this: @EnsuresNonNullIf(expression="getFieldNames()",…
Jurgen Vinju
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Lombok generating constructor without @Nonnull annotation

I'm using Lombok for generating my POJOs. I've got a bunch of fields annotated with javax.annotation.Nonnull and I expect this annotation to be transferred to the constructor automatically. However, this is not happening, Lombok seems to omit this…
Mateusz Wierciński
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If I'm using non-nullable reference types, how do I show that I didn't find anything?

I've enabled the C# 8.0 non-nullable reference types feature in one of my projects, but now I'm unclear about how to represent missing data. For example, I'm reading a file whose lines are colon-separated key/value pairs. Sometimes there's more…
Ryan Lundy
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Typescript type RequireSome removing undefined AND null from properties

RequireSome type from another, very simialar question. This question is similar but it should not be a duplicate since here we want to also remove null as well as undefined from properties. Maybe the name shouldn't be Require but something like…
ZenVentzi
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int cast as object in properties is 0 when null

Sorry I couldn't think of a better title to describe the issue. I use the following code to make it easier to update specific values of config properties. Note that the config properties are not just integers and there are not just 2 of them, just…
Sakuya
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Get error "Cannot convert to null 'Point' because it is a non-nullable value type."

Sorry advance for such a simple question ( I have googled but I am stumped, new to programming) sample code below public Point GetRandomWalkableLocationInRoom(Rectangle room) { if (DoesRoomHaveWalkableSpace(room)) { …
Muzzasa
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Kotlin nullable comparison: different expression vs function result

I don't get the following results: I have a function alreadyDoneToday():Boolean. While debugging I noticed an odd behavior. The expression itself returns true, but false when wrapped inside the function. var lastDone: Date? = null ... fun today():…
Matthias
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How can I run a query on a dataset that returns different columns to the table?

I'm trying to pull some data from a SQL table in my dataset using C#. In this case I do not need all the columns just a few specific ones, however as I am not pulling back a column with a mandatory NOT NULL, the copy of the table is throwing the…
G-.
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Set null to Thread to prevent memory leak in onDestroy Android

I am using Thread for some Async operations. Now primarily I have 3 Threads like : private lateinit var horse1Thread: Thread private lateinit var horse2Thread: Thread private lateinit var timerThread: Thread Calling stop() in onDestroy() of…
Arka Prava Basu
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How in kotlin to initialize a two dimensional non-nullable string array

Having a two demential string array and the row has only two items, i.e. {{"1", "a"} {"2", "b"}, {"3", "c"} ... ...} the invert function to do the invert public static String[][] invert(final String[][] array) { final String[][] newarray = new…
lannyf
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Laravel migration cancel column as nullable

I created a migration with name column making nullable. How can I change name as not nullable? My previous migration code is given below: Schema::table('users', function($table) { $table->string('name', 50)->nullable(); });
Syed Abidur Rahman
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null parameter in url

I have some javascript that calls an action method on a controller (MVC, C#) there are two parameters defined, both have values but I get a null reference exception. Heres the javascript that calls the action…
proteus
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