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Mocking Instance with deep stubs

I want to mock a lazy injection with deep stubs using: But myClassInstance.get().myMethod() results in a NullPointerException because myClassInstance.get() returns null instead of a mock. Is this an unsupported feature or am I doing something wrong? I’m using junit-jupiter 5.9.0 and mockito-junit-jupiter 4.6.1. Answer This is a result of erasure of generic types. Mockito does not have access to the

Regex to match only 6letter alphanumeric words in a string

I am trying to match the 6 character word that has a combination of ONLY alphanumeric. Example String: I am currently trying regex [a-zA-Z0-9]{6} However, it matches below Output: But, what I need is only combination of alphanumeric. Something like below Desired Output Answer You may use this regex with 2 lookahead conditions: RegEx Demo RegEx Details: b: Word boundary

Propper way to describe request body as java class

What is the propper way to describe json body like this in spring-boot app? For now i have class like bellow, but i have problem with serialization of mpa and genres fields. Genre and Rating: Answer Jackson ObjectMapper cannot create the object, because neither default constructor exists nor any other creator is provided (e.g. @JsonCreator, @ConstructorProperties). You also have a

Log4j2 log file not created

For a spring-boot application I’m trying to set up a log4j2 logger that will write the logs into a few sperate files, but the logs are only written to the console, I’ve checked my user_dir to make sure I’m not looking in the wrong location as well. This is the code that should write the test logs: this is my

PrearedStatement executeUpdate() is not working

I’m new to JDBC and using the following code to update the row using MySQL JDBC driver. I have no idea why executeUpdate() is not updating the content in the database. Can anyone help me? Answer Your query string is wrong. It should be something like this: Look here for the proper syntax of update: Also if you want

fragment binding (symbol “id” cannot be resolved)

I am trying to use the binding method in android studio to connect two fragments using onCreate and onViewCreated methods. so far i am getting id not resolved error. I have already connected the fragments on the xml graph. Bellow is the code of the settings java file. Answer Make sure to add this in build.gradle(app) Then give sync project

Regex to return all subdomains from a given domain

Given a domain string like aaaa.bbbb.cccc.dddd I am trying to iterate over all of its subdomains i.e. I thought this regex ((?:[a-zA-Z0-9]+.)*)([a-zA-Z0-9]+)$ should do the trick (please ignore the fact, that I am only matching these characters [a-zA-Z0-9]), however it only matches the full string. How can I modify it to make it work? Edit 1: The following code should

Why java allows “var” to declare generic variable without specifying type, leading to runtime issue? [closed]

Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 28 days ago. Improve this question Hi: this code get compiled: But with runtime issue. The list local variable is of ArrayList but not any ArrayList<xxx> generic type. Why java let