I have enum class with values which are suppose to grow by time and I want users who add new enum values also provide the impementation somewhere. But I am not sure how to force them to provide impementation as impementation will be in some other class. For e.g.
I have a String as "ishant" and a Set<String> as ["Ishant", "Gaurav", "sdnj"] . I need to write the Predicate for this. I have tried as below code, but it is not working
I know a functional interface means you can have exactly/only 1 abstract method with more than 1 default method(s) but I am wondering how to relate to it with a real-world example/situation of using a functional interface in Java.
I know a functional interface means you can have exactly/only 1 abstract method with more than 1 default method(s) but I am wondering to relate it with a real-world example/Situation to use functional interface in Java.
I can understand why Total1 is calculated, but as Total2 is calculated I have no idea! How can a BigDecimal::add be used in a BiFunction? Signatures are not the same !!!
I have the following piece of code, that uses java Functional Interfaces, that compiles, but it's not clear why does it compile:
I was learning to write some lambda representation as FunctionalInterface. So, to add two integers I used:
I'm completely new to Java 8 and I'm trying to wrap my head around why the last test is false.Output:
Why does the below code return Predicate<String> and not boolean? My understanding is that the !s.isEmpty() check here is going against the Predicate boolean test(T t); The return type here is boolean.
In Java (using Java 8 currently), I can write this and all will compile nice and well:Yet, I cannot write this: