I got from my repository Flux and in my controller I want to send it to my template. my controller: I getting error in my Freemarker’s template : reemarker.core.InvalidReferenceException: The following has evaluated to null or missing: ==> user Answer Question is, what do you need to call in Java to get the content of the user? When you write
How to flatten dynamic yaml file using java
I want to parse dynamic yaml files using java into HashMap and access them using dot syntax (i.e “a.b.d”) Given the following example.yml: And can fetch it as Any idea How we can achieve this? Answer As Thorbjørn said in a comment, a HashMap is probably not the correct data structure for representing a YAML file. You should try looking
Implementing List interface for CustomList in Java
I need to create a custom list that adds elements in pairs. I copied a similar implementation and adjusted it as needed, but unfortunately, it doesn’t work. And I have this for testing my code so far. The problem is that when I call add method the size of the list increases by 2 as it should, but nothing is
MapStruct + Kotlin/JVM(v1.5.10) Error: The return type Flow is an abstract class or interface
My project uses MapStruct successfully when it does not include Flux or Flow streams. When I try to generate a mapper with a Flow or Flux, I receive an error: “error: The return type Flow is an abstract class or interface.” Since Flow and Flux are interfaces, is there a way to still use MapStruct or do I have to
Spring kstreams cannot get processor to work – The class ‘[B’ is not in the trusted packages
Full code: https://github.com/BenedictWHD/kstreams-example So I have a producer (data-ingest), processor (external-message-processor), and consumer (internal-message-processor (This will become a processor later once I get things working, so apologies for the naming at the moment, but it is a consumer)). The data-ingest works from what I can tell as it sends messages to the topic external_messages. The external-message-processor attempts to read from
How is compiler inferring type on a generic method?
I have a Storage class: There are two classes where class Child extends Parent: Parent Child Driver class: Because Storage is a generic class, the operations on its method makes sense; I get how case 1 is working. In case 2, with above signature of max in GenericTest, I get the compilation error: The method max(List<T>) in the type GenericTest
Java scanner input loop throwing No Such Element exception after first loop
I want a program that repeatedly prompts the user to input a number and then prints whether that number is prime or not. This works once, then on the next iteration it gives a No Such Element Exception before the user can enter another input. I’ve tried using IF statements with hasNext() or hasNextInt() but those never seem to be
How to use findAny() to find a spesific value in a 2D Array
I have a 2D array as follows I’m asking the user to give a number. Let’s say he gives 20. So, I want to code to compare that value with the seatsPrices array iteratively and find any i,j indexes of the seatsPrices array which its values is 20, and print it. I should probably use findAny() but I cannot figure
Make display data textviews invisible until a city is searched
I set my textviews on my weather app to display the data for cities when searched on my search panel (i.e temp_out.setText(response.body().getMain().getTemp() + ” ℃”););. It works quite fine only that the textviews used to display those data still reflect on the app(i.e temp_out). I want to set it up in such a way that the textviews will be invisible
Spring:- What is the difference between ref attribute and ref tag?
I am pretty new to spring and have been learning from the official docs. I found that to inject a dependency using XML configuration, there are two ways to declare refs:- Or, I can use the ref tag, like:- Is there any difference between the two ref declarations? If not, why does spring allow two different methods? Thanks in advance.