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Beginners doubt on JPA entity foreign mapping

Hi I am new to jpa's and am learning of foreign key mappings between two table. I need resources to learn on Jakarta JPA manytoone mappings. ...

convert n-tree to dictionary based on depth

```java public Map<Integer, List<Integer>> toDict() {
Map<Integer, List<Integer>> dict = new HashMap<>(); Queue<Node> queue = new LinkedList<>();...

isometric tile setup

i have a 2D array of tiles, and each tile is 32x32 pixels. ```java public void toIso(){ int newX = x+y; int newY = (int) (0.5*(y-x));...
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Issue with multimodule project

I'm trying to publish my project to maven central, but I get this error. ``` Execution failed for task ':api:publishMavenPublicationToMavenCentralRepository'.
Failed to publish publication 'maven' to repository 'mavenCentral' Invalid publication 'maven': multiple artifacts with the identical extension and classifier ('jar', 'javadoc')....