writing tests and not sure how can one rewrite this code: to reactive one: Note: first findById() signature is: Optional findById(Long id) second findById() signature is: Mono findById(ID id) Answer It is possible to do something like this:
How can I combine *u” and the UTF-8 code for console output? (Java)
I would like to combine a “u” with a String that contains a Hex-Code so that I can print out a unicode character in the console. I’ve tried something like this, but the console only prints regular text, eg uf600: Answer In Java, u exists only in the compiler, as a convenience to help you add…
Ambiguity in a CodeForces Problem – usage of HashSet Vs LinkedHashSet
I was solving a Codeforces problem yesterday. The problem’s URL is this I will just explain the question in short below. Given a binary string, divide it into a minimum number of subsequences in such …
How to format the date time correctly in Spring Boot?
I would like to know how to format the date time correctly? The result is Localdatetime yyyy-MM-ddTHH:mm. Could you advise how to solve? I’m using Java 11, and does it because @JsonFormat not support @RequestParam? Controller: Entity: Answer Since you are using Spring-boot , I’m also assuming you …
Eclipse does not suggest methods in Lambda expression
I have an ArrayList of Strings, and am adding a method to sort the ArrayList list.sort(Comparator.comparing(x -> x.length())); When I write x and press ctrl + space eclipse does not suggest the …
(Kind of solved but still appreciate better answers) Android Studio: How to identify certain special pages in a PDF file?
I am writing an app that generates Maths worksheets for school students. It will, for example, generate 2 to 5 pages of simple Maths questions and 1 to 2 pages of answers. The PDF can be saved to file and loaded again later. Then it has a print function that can print all the pages. I want to make it
nodejs mongodb and android studio slow fetch speed
I have a system which, pulls data from my server and stores it to a mobile SQL database via android studio. It works but it is painful slow like 30mins. I have around 86000 records in my database and want to pull all of them out of the server. What is the best way to do this? Presently I get
How to create a parent child Json response in Spring Boot with a Enum using Java
I am trying to create a json response from a Spring boot application where the name of the enum will be the parent structure and below that all the child will be residing . What i have created is showing only the child hierarchy but i want the parent also .Like i want below what i am getting is Below
Spring SPEL collection projection
A simple question on SPEL collection selection. Look at section 10.5.17 Collection Selection on this page https://docs.spring.io/spring/docs/4.3.10.RELEASE/spring-framework-reference/html/expressions.html What i need is the selection ‘Serbian’ to come from outside and not be a fixed hard coded Str…
gradle javaexec error “‘apiElements’ directly is not allowed”- Gradle 5.4.1
I am new to Gradle and trying to migrate an existing system build from ant to Gradle. As part of this I need to run a java program on every file in a directory. Directory contains xml files and the java code will parse and convert .xml to .java files (and these Java files would be build to generate class