Read the “ TIOBE index” for more details. Overall, Java is among the top three most popular programming languages due to the various advantages it offers. For e.g., Spring 5.0 started supporting Kotlin only in 2017, so it still lacks the advantage that Java has in terms of maturity. The use of Kotlin for backend projects is a recent phenomenon. ![]() However, if the objective is the creation of larger, more complex products, then working with Java is the better choice. If Android development is the main objective, then Kotlin is the right choice given the productivity advantages and the massive support from Google. Should you choose Java or Kotlin for your next software development project? Consider the following factors: Factor #1: The larger objective This is a great topic that we will cover in this article. In order to find the ones with which we have decorated Item‘s properties.Interested in which is the best choice, Kotlin vs Java? In our naive implementation, we just get the Item‘s properties: val fields = item::Īnd iterate over all annotations of each property: for (annotation in field.annotations) To this end, let’s decorate the properties of the Item class with our custom annotations: Positive and AllowedNames: class val amount: "Bob"]) val name: String) ![]() We assume that an Item instance is valid if the value of the amount is positive and the value of the name is either Alice or Bob. Suppose that we should decide whether an instance of an Item is valid: class Item(val amount: Float, val name: String) Here we present only the idea while the complete code is available in our repository on Github. In order to demonstrate how we can process annotations, let’s create a simple validator.
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