I have multiple Java streams of the same length, and I want to perform some operation on the corresponding elements of each stream. For e.g., add 1st elements of all stream, 2nd elements of all streams and 3rd elements of all streams and so on. How can we do this without first reducing each of the streams? fo…
Tag: java
how to configure spring security for spring boot project
I’m trying to make a web application that uses: SpringBoot, Mysql, JDBC , MVC, DAO Thymeleaf, IntelliJ And I’m trying to figure out how Spring security works (which I’m having a lot of difficulty with). My views are organized as follows: I would like to do that unidentified users can access …
Java Exception: Unauthorized: 401
I’m getting the error: Exception: org.springframework.web.client.HttpClientErrorException$Unauthorized: 401, when trying to connect to Jira through HttpHeader, and the credentials are configured in a configserver file, which would be this: And the method where I command to call the file above and where …
Custom Exceptions for JWT authentication don’t work JAVa
I implemented in my API Rest JWT authentication, but the exceptions that I created don’t work. This is what I expect: This is what I get: This is my CustomException Class This is what I have in my globalExceptionHandler And finally this is what I have in the method validateToken in JwtTokenProvider: pub…
JavaFx: CSS element unable to inherit properties of it’s ID
I have created an Options menu with JavaFx and styled it with CSS. I have used FXML for designing the options window. In the options window, I have created a label at the top and given it ID “title”. Following is my FXML code and CSS code: FXML for Label: The problem with my output is that the lab…
Gatling Parameter value is getting Print in some unknown format
I am running below Script which is running fine in Gatling However its printing in format of some(value) and I am not getting why.it should print like 123456 but its printing some(123456) Answer session.attributes.get(“user_id”).toString You should be using the Session API correctly, please check …
How to declare a generic method in Java?
I am learning Java generics and am confused by the method signature. It seems as if people are using it differently in every example I come across. For example, on the site Baeldung, this is the example they give: And then they go on to say this: The <T> in the method signature implies that the method w…
Validator Framework @Min, @Max, @NotBlank not working
I am trying my hand in Validator ANnotations and I dont seem to have the hang of it yet THese are my DTO THis is my controller This is my request body I am able to get a valid answer for this, it doesnt raise an error or send my error messages. I dont understand why??? Someone help please Answer
R.layout.activity_noconnection error in android studio
I recently changed my package name using this method. but now when im trying to create a new activity its giving me an error on R.layout.activity_noconnection (on R). then i pressed alt+enter to fix the error it imported “import OldPackageName.R” and that fixed the issue, so that means my old pack…
Verify Hashing.sha256() generated hash
I have this code created using Google Guava: How I can verify the generated values is a properly generated hash? Answer SHA-256 and, in general, the family of SHA 2 algorithms is wonderfully described in Wikipedia and different RFCs, RFC 6234 and the superseded RFC 4634. All these sources dictate that the out…