Null safety in kotlin12/18/2023 ![]() There are at least couple of approaches to. Such a chain returns null if any of the properties in it is null. Kotlin is a statically typed JVM language developed byJetbrains.It has some good documentation so today I will focus on a tiny part of it - null safety. ![]() Now, if you call a method or access a property on a, it's guaranteed not to cause an NPE, so you can safely say: val l = a.lengthīut if you want to access the same property on b, that would not be safe, and the compiler reports an error: val l = b.length // error: variable 'b' can be nullĬhecking for null in conditions Safe Calls b?.length It throws NullPointerException immediately if it found any other null pointer without any other statement. It reduces the risk of null reference within the code. Declare a variable as nullable string, written String?: var b: String? = "abc" Kotlin is a null safety language that helps to remove the null pointer exception or null reference from the code, which is deliberately called A Billion Dollar Mistake. How can we handle Null safety in kotlin What is Null Safety in kotlin Null Safety is a process to eliminate the risk of occurrence of NullPointerException.
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