In my Spring Boot/Kafka application before the library update, I used the following class org.telegram.telegrambots.api.objects.Update in order to post messages to the Kafka topic. Right now I use the following org.telegram.telegrambots.meta.api.objects.Update. As you may see – they have different packa…
How to download an excel file in Spring RestController
I am using Apache POI to generate .xlsx file. I would like to return that file from Spring controller. Here’s what I’ve done so far: Controller: Is it possible to return actual excel file from rest controller so user can download it to his computer ? As for now controller returning byte[] but I wo…
How to place a object without tapping on the screen
I am trying to show an object without tapping on the screen using ARCore. In the basic sample of ARCore Sceneform provided by Google, you need to tap on the screen after it detects the surface. I want to implement that, AR shows the object without tapping on the screen. I tried this for displaying without tap…
android.view.ContextThemeWrapper cannot be cast to android.app.Activity
I’m not a designer but when i got this project i can`t open specifically some screens, i think that they are screens and we only reuse some of the layouts have been created. Anyway can somebody help me? @Override public void onBindViewHolder(@NonNull final ProductsAdapter.ViewHolder holder, final int po…
Lombok builder pattern with jackson JsonProperty
I have constructed a Java Object using lombok with builder pattern. But, I am getting the following exception when trying to deserialize a Java object using Jackson. This occurs for fields which has @JsonProperty annotation. Exception in thread “main” com.fasterxml.jackson.databind.exc.Unrecognize…
Count the minimum number of jumps required for a frog to get to the other side of a river
I work with a Codility problem provided below, The Fibonacci sequence is defined using the following recursive formula: A small frog wants to get to the other side of a river. The frog is initially located at one bank of the river (position −1) and wants to get to the other bank (position N). The frog can jum…
Android Studio 3.1.3 – Unresolved reference: R – Kotlin
I am new to kotlin, i have converted some code from java but it seems like there’s something wrong, The R in findViewById(R.id.my_id) is highlighted in red and it shows this message : “Unresolved reference: R”.. I’ve been looking for a solution but i seem not to figure it out, So what …
How to set Icon to the Alert Dialog Programatically in Android
Em using these statements for creating an Alert Dialog and set icon to it, AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setIcon(this.getDrawable(R.drawable….
Do arrays in Java store data or pointers
I was reading about data locality and want to use it to improve my game engine that I’m writing. Let’s say that I have created five objects at different times that are now all in different places in the memory not next to each other. If I add them all to an array, will that array only hold pointer…
How can I broadcast a message to all clients connected to an Undertow websocket server?
This is my current setup for an Undertow websocket server: This is copied from one of their demo files. I believe onFullTextMessage here broadcasts any messages it receives to all clients. I want to be able to trigger this behavior on demand. So instead of having to receive a message and using an event handle…