I have an interface with a default method, and two classes which implement this interface. One of the classes overrides the default method, and the other does not. I get access to the giveHello method using reflection like this: There’s one weird thing here. The polite class does not override the giveHe…
How to integrate GraphiQL with Spring-Boot?
My target is to build a GraphQL server on Spring with (1) GraphiQL IDE (2) dynamic GraphQL schema at run-time. My GraphQL engine is GraphQL-Java. In my first try, I use graphql-java-spring-boot-starter-webmvc and graphiql-spring-boot-starter. Both the GraphQL server and the GraphiQL work well. However, under …
Get Current logged User Id and User Name using JavaFX
I’m trying to create an application using JavaFX. I want to get current logged userid and username, after successful login. I want to display it is in the home page. How can i do this? please help MediaController.java Answer Let me get this straight, you have the user login, then change the scene to a m…
Why can’t we access static content via uninitialized local variable?
Take a look at below code: As you see while trying to access static field x via an uninitialized local variable Foo foo; code foo.x generates compilation error: Variable ‘foo’ might not have been initialized. It could seem like this error makes sense, but only until we realize that to access a sta…
Android NavigationView vith rounded corners
I am designing a custom Drawer on Android, it must have rounded corners in top and bottom, I am first customizing top side and I find the problem that the background of the shape is not transparent. I have: (source: toile-libre.org) I need to build: (source: toile-libre.org) I would also like some help on how…
Get CameraX final resolution
Just created a camera preview in Android with CameraX with the following configuration: Now, the problem is that such target resolution may not be available, in which case the preview will choose a resolution closed to the requested one. What I’m asking here is a way to know which resolution has effecti…
How to inject spring beans into the hibernate envers RevisionListener
I am using Spring 5.1 and Hibernate 5.3.9 including hibernate-envers. I don’t know how to inject spring beans into the hibernate envers custom RevisionListener. I have tried Of course the class is included in the @ComponentScan packages resolution. A problem is that myService is not injected into the li…
Decrypt a Java AES encoded String in Dart
I need to decrypt an AES (PKCS#7) encoded string in my Flutter mobile application. The string is got from a QR Code, which has been generated from a Java application and contains the AES encoded String. The Java encoding : Output : AIRTEuNmSuQtYuysv93w3w83kJJ6sg7kaU7XzA8xrAjOp-lKYPp1brtDAPbhSJmT The Dart deco…
Unable to migrate android sqllite database
I have been running the onUpgrade method without issues, until this column: I have updated the database version. The above has been simplified to try and make sure that nothing else is causing this column to not be created. Note that if I uninstall the app and reinstall the app, then it runs without issue. Ho…
Adding Spring Dependency Injection in JavaFX (JPA Repo, Service)
I have a java FX basic application which has a simple Scene(a form). I have a Mysql Db and I am using Spring JPA (spring data jpa i.e repository/entities) to interact with the same. Now, since we know that javaFx has some lifecycle hooks namely: init() start() and stop(). Let’s say I want to insert data…