Kotlin Futures

Reflection is a set of language and library features that provides the feature of introspecting a given program at runtime. Kotlin reflection is used to utilize class and its members like properties, functions, constructors , etc. at runtime.

Create a function isPositive() which takes two different types Int and String and call this function with different type parameter.

Implementors define a single method with no arguments called call . The Callable interface is similar to , in that both are designed for classes whose instances are potentially executed by another thread . A Runnable , however, does not return a result and cannot throw a checked exception.4 Ağu 2020

Kotlin class is similar to Java class, a class is a blueprint for the objects which have common properties . Kotlin classes are declared using keyword class. Kotlin class has a class header which specifies its type parameters, constructor etc. and the class body which is surrounded by curly braces.

In Kotlin, a function which can accepts a function as parameter or can returns a function is called Higher-Order function. Instead of Integer, String or Array as a parameter to function, we will pass anonymous function or lambdas . Frequently, lambdas are passed as parameter in Kotlin functions for the convenience.