I am migrating a project from python to java. There is a multiple inheritanced python tool class, called Util(TimeUtil, MathUtil, FileUtil, …), it extend several Util classes. For example Normally, I would call Util.date_to_str(), Util.add(), Util.read_file() in python, importing class Util is enough, a…
Tag: java
POST/PUT/DELETE doesn’t shown in swagger springboot
it’s my swagger Config file Student Controller StudentDTO class My Repository Myapplication class application.properties pom.xml When I run this application everything looks fine but I can’t see the POST/PUT/or DELETE. I try to many things I find from Internet but it doesn’t work. I new on t…
Why did I get exception when I access CloudTrail Events ? Thanks
Exception: com.amazonaws.services.cloudtrail.model.AWSCloudTrailException: The security token included in the request is invalid. (Service: AWSCloudTrail; Status Code: 400; Error Code: UnrecognizedClientException; the sample code : awsCredentials (accessKey, SecretAsscessKey) is the temporary credential I got…
Unable to fetch unread messages from SMS inbox
I have successfully retrieved all messages from inbox but I want only unread messages . I have also apply in the query as read=0 which gives unread SMS but it can’t retrive unread messages it retrieves all messages. Answer Change your query arguments like this You are passing selection where clause for …
Painting method paints things from other components
I am trying to make a simple Java program with GUI using Java Swing. I have painting panel (gPanel) in the center of the screen, panel with buttons (buttonSet) in the west and panel with labels (labelPanel) in the east. To paint over gPanel I use paintComponent method and since I have two buttons, which are s…
What are the best practices for calculating statistics in REST API applications
I am trying to make a service that will calculate statistics for each month. I did smth like this: But it takes a long time if there are lots of etries in the database. Are there any best practices for working with statistics in REST API applications? And also I’d like to know if it is a good way to
How to set the width and height of a layout in Android?
I have this ConstraintLayout: lateinit var myConstraintLayout: ConstraintLayout I try to set its width and height to match its parent via code, like this: But I get error androidx.constraintlayout.widget.ConstraintLayout$LayoutParams cannot be cast to android.widget.FrameLayout$LayoutParams Why? How do I fix …
PostgreSQL’s JSONB data type with Hibernate: Error creating bean with name ‘entityManagerFactory’ defined in class path resource-Unable to load class
Now I learn about nested jsons and geojson and how to save them in PostgreSQL as JsonB directly in database and before starting. Inspiration source: https://thorben-janssen.com/persist-postgresqls-jsonb-data-type-hibernate/ Error I get when running the app: Here is the Main Entity: Here is the geojson(nested …
Spring Boot, Spring-Security – BcrypPasswordEncoder in new component-based security configuration
I am trying to use the new Component-Based (Without WebSecurityConfigurerAdapter) configuration and setted up my Security Configuration as follow: SecurityConfiguration.java file but when I run the application and try to log a user the following error appears even though I have the BCryptPasswordEncoder as a …
how to define how many levels of objects to get in a JSON in java with jpa?
if we have a Product and Supplier object, where Product has a supplier and a supplier has a Product, how can we indicate to the entities that this is not an infinite cycle when obtaining the JSON of a product? this would be something like how could we configure this in java with JPA by levels? so that it is