Kotlinには、not-null assertion operatorという、nullableな値を、非null型に強制で変換してくれる演算子（!!）があります。nullな値に付けると、Null Pointer Exceptionを投げてくれます。 詳しい説明は、kotlinlang.org にお願いするとして、出だしは以下の文言から始まってい ...

While Java is one of the most in-demand and widely used programming languages in the world, it is not without its detractors. Java is not a particularly beginner-friendly language and it is rife with ...

Please do a quick search on GitHub issues first, there might be already a duplicate issue for the one you are about to create. If the bug is trivial, just go ahead and create the issue. Otherwise, ...