Let me give some background information: I have an org.json JSONObject which has all of the values of this JSON object, taken from an API. The thing is, however, that while in one of these calls to the API, there is only one value that is null, but the same value isn’t always null, and there can be more…
Tag: java
multiplication compound assignment operator with more than two numbers
I am doing coding exercises right now and came across one task which I don’t know how to do, I also could not find any solution on the internet =( I know how =* and all alike compound operators work with a single number, but I don’t know how it works with a complex expression like 3 / 2. IntelliJ
Fetched Date is setting incorrectly
So for example I save Date to database: And it is saved to database as this date for example 2021-09-01. Then I fetch this date and add two day for example and it should be 2021-09-03. This is the code: But the result I get is not the correct I want, because I get this: is should be How I
Unchecked Cast warning – shows up for Type parameters but not for Concrete types?
Consider the following snippet: From what I understand – whenever we convert Supertype -> Subtype Unchecked cast is flagged as the compiler does not know until the runtime if the type represented by the Supertype will ever match the SubType. Then over here – why is (Double) (Number)a not being …
Minecraft forge server not working / downloading files
I’ve created a bat file with the command line ” java -Xmx1G -Xms1G -jar forge-1.12.2-14.23.5.2855.jar nogui ” inside my server folder. It keeps closing there is some kind of error. I removed my name of course from the folders and I blurred out the folder name it’s a stupid name. and th…
Secure a Java web app using the Spring Boot Starter for Azure Active Directory JWT token algorithm problem
I’m created java web application using spring boot starter for azure active directory step by step like is described in:https://learn.microsoft.com/en-us/azure/developer/java/spring-framework/configure-spring-boot-starter-java-app-with-azure-active-directory My application with my azure account work fin…
how to compare input with file data
I’m trying to compare user input name to the exists names in the file javaFx if it the same name will get alert if not another window will appear. but I always get new window even if the name exists any suggestion? Answer You want to display an alert if the same is already present in the info.txt file. …
Should I implement serialVersionUID in Exception Subclasses?
on a code review I saw Code like this… as I know we need to implement serialVersionUID to be sure that we deserialize same version of an Object as serialized. And if we take a look on Hierarchy of class Exception, we will see there is a implementation of “Serialiazable” interface. But in the…
java.time.format.DateTimeParseException, and I do not know how to solve it
I am trying to get data about some athletes from a csv file, then create athlete objects that are going to be stored in a list. The problem is that I get an error when I try to parse the time they’ve got as LocalDateTime.This is the error I get: Exception in thread “main” java.time.format.Da…
RedirectAttributes not working in SpringBoot project
I am trying to set up RedirectAttributes, but nothing happens when I do so. Here is my controller: This is a SpringBoot project, and since it is the Umbrella over Spring MVC, then I assumed I could use RedirectAttributes. So, what is going on? When I hit this end point, I am returned: redirect:uploadStatus An…