I am using Java 11, and we have two ways of passing in functions as an argument. functional interface Function<T, Y> Now I am not able to find anything on when to use which one. I can figure that we can use a generic functional interface over a Function<T,Y> when we either don’t want to pass any arguments or have
Tag: functional-interface
Replace class methods with lambda expressions, is it bad practice?
I had a few questions that I’m having trouble finding the answer to, at least in Java. I saw a Class definition in a tutorial where lambdas were being used similar to methods. So I’m curious as to if there is any benefit apart from concise code and style preference. Example: Is this a valid class definition? Is this a
incompatible types: bad return type in lambda expression | void is not a functional interface
I am going through Java 8 Feature and using Jshell to explore it. I tried to run the below command: But it failed with the below error: I didn’t get exactly what’s the issue Consumer takes one argument and return nothing. Same I am doing here by passing 1 arg str and printing. So what’s the issue with this syntax.
Can Functional Interfaces with generic type be stored in a static map?
I have used a static map to store a series of Functional Interfaces which associated with three classes A, B and C all inherited from a parent class. The code runs smoothly as follow: However, there is a warning “Raw use of parameterized class ‘BiConsumer'” on the usage of Biconsumer in the static map. I tried various ways to add
Java Consumer MethodReference for nonstatic methods
Code snippet: class Scratch { Map<ActionType, SomeConsumer> consumerMapping = Map.of( ActionType.REJECT, DocumentPublisher::rejectDocument, …