I have an .pfx file and a password for the file. I would like to decrypt a RSA encrypted file using Java. Basically the same approach like here (c#), but in java: https://stackoverflow.com/a/37894914/13329087 is this possible? my approach so far: this produces an Error: Answer Unfortunately you didn’t p…
Add Mutlidimensional Array to ArrayList
I want to add a multidimensional Boolean Array to an ArrayList. How do I do that? Below is an simple example: public boolean[][] BooleanArray; ArrayList BooleanArrayList= new …
Is there a material difference between pop() and remove() in Java ArrayDeque?
Both remove and pop remove and return an element from the front of the Queue. They both throw an exception if there’s an empty Queue.
Java toString in class
I am getting an error of cannot find symbol in my code posted below. I am trying to initalise a sedan using it’s class and have the toString function right after but nothing is working for me. Please help Answer According to what you provided, I think this is what you are trying to do Why we use @Overri…
How to mock the discoveryClient?
I’m working with Eureka and I have a Method that uses the DiscoveryClient to obtain the instances of a service and the call this service and retrieve some information like this: It works, but now I want to make a JUnit test for the method and as I’m not going to have the Eureka working in the JUni…
Using Vaadin Flow with Jakarta EE 9
I see that Apache Tomcat 10 (alpha) is now available. The major feature there is support for Jakarta EE 9 where package names for APIs have changed from javax.* to jakarta.*. Jakarta EE 9 now has a milestone release available. Can the current versions of Vaadin Flow (14 or 16) be made to work with the new Jak…
Spring Data Elasticsearch (4.x) – Using @Id forces id field in _source
Summary Recently we upgraded to Spring Data Elasticsearch 4.x. Part of this major release meant that Jackson is no longer used to convert our domain objects to json (using MappingElasticsearchConverter instead) [1]. This means we are now forced to add a new id field to all our documents. Previously we had dom…
Split a list into n sublists in all possible ways
I want to split a list into a given number n sublists in all possible ways in Java. For example [1, 2, 3, 4] where n = 3 would include the following lists (but would not be a complete solution – complete would require much more space): etc I adapted a solution from another similar question (Split a list…
How to properly use open gl calls with libGDX
I am trying to render a terrain using my own shader and by using low level open gl methods. But other parts of the game use SpriteBatch and other GDXlib render classes. My openGL code for terrain renders correctly until I make a call to: or something similar like: After that call, my openGL code just not draw…
Java class and methods returning wrong value
I am writing code in java to simulate entering a circus at a very low level code wise. It is just a couple of classes under a main class, Customer. My code is just the main class and its methods, then some print statements, My admitted method is returning false for all values when it should return true if the…