is there something to tell the Java to Kotlin converter in I kotlinlang #intellij

is there something to tell the Java to Kotlin converter in Intellij that some fields are non-nullable, so that the converter doesn't make everything nullable by default? I tried adding some

@NotNull

annotations on fields/construction parameters, but the converter still makes everything nullable

Ilya Kirillov [JB]

12/09/2019, 10:10 PM

This looks like https://youtrack.jetbrains.com/issue/KT-34987 which is fixed in 1.3.61. Which version of Kotlin plugin do you use?

Pacane

12/09/2019, 10:12 PM

1.3.61

IntelliJ IDEA 2019.3 (Ultimate Edition) Build #IU-193.5233.102, built on November 27, 2019

Ilya Kirillov [JB]

12/09/2019, 10:25 PM

Just checked on 1.3.61:

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import org.jetbrains.annotations.NotNull;

public class Test {
    void Test(@NotNull String notNullParam) {}
}

generates:

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class Test internal constructor(notNullParam: String)

Could you please provide me with reproducible example?

Pacane

12/09/2019, 10:26 PM

sure 1s

It seems to be happening with an abstract class extending another class

trying to get a minimal reproducible case

This is

B.java

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package com.bitboxusa.core.abstractions.eventbus;

import org.jetbrains.annotations.NotNull;

public class B {
  @NotNull protected final Integer b;

  B(@NotNull Integer b) {
    this.b = b;
  }
}

This is

A.java

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package com.bitboxusa.core.abstractions.eventbus;

import org.jetbrains.annotations.NotNull;

public abstract class A extends B {
  public A(@NotNull Integer some) {
    super(some);
  }
}

I'm only converting A.java to Kotlin so far

ending up with

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package com.bitboxusa.core.abstractions.eventbus

import org.jetbrains.annotations.NotNull

abstract class A(some: @NotNull Int?) : B(some!!)

I'm going through this progressive migration

Ilya Kirillov [JB]

12/09/2019, 10:46 PM

Still getting valid result for you example:

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abstract class A(some: Int) : B(some)

As a temporary solution, you can try use old version of J2K, which can be enabled by disabling

Settings -> Languages & Fraameworks -> Kotilin -> Use New Java to Kotlin Conversion

Pacane

12/09/2019, 10:47 PM

I'll try that, ty