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Return all possible combinations of two custom type lists in java

I am trying to add the values of ingredients and topping to my scoops list, but that doesn’t work due to the type of scoops. I can’t change the type of scoops to String and I need to solve the problem as it is in the code below. See the picture to see the problem I get when I try

Mapping multiple DTO to entities – nested exception

I’m trying to map DTOs to entities. I created a service that only takes care of mapping objects – ObjectMapper. DTO objects have relationships with each other. When I map a single object, for example when I create User, Group, Note, everything works. But when I want to use a method that returns a Note with a specific ID –

Apache CXF – ClassCastException on Creating a Dynamic Client

I’m attempting to utilize the Apache CXF library to create a dynamic client that will read a WSDL and parse it into Java objects for processing. The application into which this logic is being implemented has been built using Spring Boot 2.7 and JDK11. The JAR artifact runs on the embedded Tomcat container provided with Spring Boot. JDK11 has removed

How do I map a Comparator to a Comparator using a Function?

I have a comparator of type Comparator<Integer> and a function Function<Pair<Integer,?>,Integer> expressed as Pair::left (that returns an Integer). I need to obtain a comparator of type Comparator<Pair<Integer,?>>. If I wanted to simply map a function Function<T,U> to a resulting function Function<T,V> though a function Function<U,V> I could simply apply andThen() method like this: Is it possible to obtain Comparator<Pair<Integer,?>> in

How rewrite Java generec’s into Kotlin?

I have java class and I need to rewrite it in kotlin. But I can’t rewrite generics into it. Java class: My Kotlin class Sign (1) I marked the my problem area by my opinion. But maybe the problem is somewhere else. Answer Kotlin’s <out FlagFilter> is not equivalent to Java’s <T extends FlagFilter>. Using out at a generic declaration

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