How can I [flat] merge multiple arrays into a single List<String>? For example: Answer Assuming that you wish to add the array of Integers into the same List of Strings:
React Native Android Splash Screen
I’m trying to build a splash screen for an Android RN app. I’ve followed the steps described here : https://www.bignerdranch.com/blog/splash-screens-the-right-way/ Unfortunately, when trying to launch my app, the build is successful but the app crashes saying: Does any one know where this could co…
How to SSH tunnel and connect to a database using IntelliJ and JDBC?
I’m having issues connecting to a database hosted on a server using IntelliJ and JDBC. With the command line, the command: creates a tunnel successfully and the command: connects to the database fine and allows me to use it. How would this be translated correctly into the IntelliJ Data Sources and the S…
Difference between CompletableFuture, Future and RxJava’s Observable
I would like to know the difference between CompletableFuture,Future and Observable RxJava. What I know is all are asynchronous but Future.get() blocks the thread CompletableFuture gives the callback methods RxJava Observable — similar to CompletableFuture with other benefits(not sure) For example: if c…
Does Spring Boot support multimodule maven projects?
I’m just curious about the level of support Spring Boot has for multimodule maven projects. There’s so much work that has to be done when creating a good layered set of projects (especially getting the various JPA/JDO enhancers set up). All of the samples I’ve seen put everything into one pr…
Does the JDK provide a dummy consumer?
I have a need in a block of code to consume ‘n’ items from a stream then finish, in essence: In my situation, I can’t change the signature to return Stream<T> and simply return stream.skip(n); I have to actually throw away some elements from the stream (not simple logic) – to be …
Is Java 8 java.util.Base64 a drop-in replacement for sun.misc.BASE64?
Question Are the Java 8 java.util.Base64 MIME Encoder and Decoder a drop-in replacement for the unsupported, internal Java API sun.misc.BASE64Encoder and sun.misc.BASE64Decoder? EDIT (Clarification): By drop-in replacement I mean that I can switch legacy code using sun.misc.BASE64Encoder and sun.misc.BASE64De…
Exception in Application start method java.lang.reflect.InvocationTargetException
I am just starting out with JavaFX, and I am trying to build a simple application with a label, text field and button which, when clicked, sets the label’s value to that of the text field’s. Everything was going well until I connected the controller to the Main file. Here’s my code: Main.jav…
Caesar Cipher Uppercase and Lowercase Wrap Around
I am having a problem regarding wrapping around the alphabet with my Caesar Cipher Program. The program works fine with all lowercase letters. Wraps around perfectly and is able to apply positive and negative shifts. When i try to input an uppercase letter, the uppercase letter does not wrap around. Here is m…
HQL Join with three tables
I’m having some issues with HQL since I’m a newbie with it. Even though I don’t have issues with “simple queries”, I am currently stuck with a query involving three tables. I have already gone through some tutorials, but I haven’t been able to find a valid example for my ne…