I’m trying to implement some limits on the database requests made to the Neptune Server. The problem is: Multiple scheduled jobs that do analytics, logs, updates, deletions User activity, anything related to users: read, write, update, delete All of these request depending on when they occur can impact …
Tag: java
Maven error: Could not find or load main class And Unable to Edit System Variables
I have Maven installed, and it was working fine yesterday, however now it is displaying the infamous (Maven error: Could not find or load main class org.codehaus.plexus.classworlds.launcher.Launcher) error… In other solutions, it seems that the system variable needs to be edited from M2_HOME to M3_HOME.…
What does “Aren’t allocating the things put into queues” mean?
I’m reading this: https://concurrency.markmail.org/search/?q=ArrayBlockingQueue+LinkedBlockingQueue#query:ArrayBlockingQueue%20LinkedBlockingQueue%20from%3A%22Doug%20Lea%22+page:1+mid:sgx3amdfga7esqul+state:results In which Doug Lea says: Usually, when you are putting something into a queue, you will ha…
Why am I not getting the minimum value in an array JAVA?
Output: Answer Hello and welcome to StackOverflow. Next time, febore you jump into the internet for help, please try this approach. It will solve your problem much quicker. This process is called “debugging”. It can be done by adding spurious amount of logging like above or by stepping through the…
How can I avoid null using lambda in this case?
The following method you have seen returns all the information of the user in the database according to the phone number as follows. However, when I perform an operation based on a phone number that is not in the database, it still returns the second part instead of this message. But I want it to look like th…
Method to get and post Json object in Vertx
I’m new to Java and to backend development, and I really could use some help. I am currently using Vert.x to develop a server that takes in a Json request that tells this server which file to analyze, and the server analyzes the file and gives a response in a Json format. I have created an ImageRecognit…
Accessing array attributes from other classes with setter/getter
I’m new to Java and was wondering how to access attributes from other classes with setter/getter if they are arrays. Currently, I have one date class that sets a date with parameters for month/day/year. I need to make another class that uses the date class to set a date of hire to store as an attribute,…
Spring Boot Hibernate creates tables with wrong names
When I run my project, the Hibernate creates automatically tables with wrong names. I have two tables User and Role and also three classes: abstract class IdField.java: User.java class: and Role.java class: And Hibernate creates two tables with wrong names as id_field and id_field_roles: but I want table name…
How to remove from list if list based on condition
I have a list of objects like this: I want to iterate the list and only keeps the objects where the dates differ. If there are two objects with the same date then I want to keep the object with the bigger value. Can this be achieved by using streams and predicates somehow? Answer You should use Map and Map.me…
Why does this code get stuck in the inner while loop? [closed]
Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 1 year ago. Improve this question It stucks at i = 122; what is wrong? how can it keep looping in the while? …