If we try to assign null to the variable, it gives compiler error. Kotlin type system has distinguish two types of references that can hold null (nullable references) and those that can not (non-null references).Ī variable of type String can not hold null. Nullable and Non-Nullable Types in Kotlin – Java interoperations such as attempts to access a member on a null reference, generics type with incorrect nullability. if(Objects.nonNull(foo) & foo.something()) // Uses short-circuit as well.an uninitialized this is passed as an argument. Some data inconsistency with regard to initialization e.g.Explicit call to throw NullPointerException().The possible causes of NullPointerException’s are following: Kotlin compiler also throws NullPointerException if it found any null reference without executing any other statements. If anybody has been programming in Java or other language that has concept of null reference then he must has experienced about NullPointerException in the code. NullPointerExceptions are thrown by the program at runtime and sometimes cause application failure or system crashes. Kotlin’s type system is aimed to eliminate the jeopardy of null reference from the code because it is a billion dollar mistake.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |