This is the error I get Answer This error normally occurs, if you use eclipse and your source file has errors. If there are any errors the java compiler from eclipse emits code, that throws an error. Try to clean and rebuild
Scaling an ImageView when the soft keyboard opens
I’m creating a tabbed activity. As long as the first tab is selected, the soft keyboard should be visible. I achieved that by adding this line to my manifest file in the activity tag: As the keyboard opens, the space for the layout shrinks. The most space is occupated by an ImageView. I want it to shrin…
Select the top row in JPQL without using native query option
How is it possible to select the first row at the top of the selection without using native query option in JPQL/JPA? Answer You might be able to use a max subquery here to restrict to the “first” row: This would be logically correct if orderNumber would always be guaranteed to be unique, in which…
Merge two api responses into one using Webclient – Webflux
I’m using WebFlux and WebClient and I need to consume two APIs and merge its responses. The first API receive type and document number and returns a list with one element that contains customer data (that’s how it’s defined). The second API receive a client id and returns a customer payments…
How to handle file access in a reactive environment
I’m refactoring some blocking code to reactive (using Reactor). I think most of the methods in the java.nio.file.Files class are blocking. Is it right if I replace a method like: with: I think it’s necessary, especially when cheap HDDs are used. Or does a library exists in Reactor for this kind of…
I’m getting “Topic not present in metadata after 60000 ms” message on some computers
Here’s my program I run it on Windows and Linux. On some computers it runs fine, but on other computers, specifically a Linux machine which is not the kafka machine, it consistently gives me this error: This happens, of course, when trying to send a message in the run() function, specifically in the sen…
Why am I getting an error when trying to save a list in Room database with the help of a type converter?
I want to store a list of Integer type in a Room database. For this I wrote a converter that looks like: Here is a part of the model class: And also a database class: And when I’m getting the list, I get an error: So the list is null. What am I doing wrong? Thanks for any help. EDIT:
JavaFX – Change ListView’s FocusModel
I have a ListView and am currently overriding the SelectionModel to prevent selection of the items, but when you attempt to select an item, it is still showing the outline. Reading over the API, I found that I can do the same thing but this time by overriding the FocusModel using And here is my SettingsFocusM…
Colored Emojis in Java Swing Labels
I was wondering how to dispaly colored emojis in swing. I have a feeling that the Swing (awt) font engine is unable to do this. I’ve tried using the windows emoji font (Segoe UI Emoji), but sadly it only displays the monochrome variants. Is there any UIManager-Property or Client-Property that I can set …
How can I create .JAR to Do a specific task , then use this JAR in another project?
e.g : i have a simple code that take an array list of numbers and computes Sum. I am created a .JAR of this code. now my question is how can I import this JAR in another project and pass array list to it , and JAR give me the result to reuse it ?? Answer This is an example