How to deploy stack with docker-java client? ex) docker stack deploy –compose-file docker-compose.yml stackdemo Is there any function to run this command in java client? Answer If you want to execute multiple commands I suggest you to write a shell script file and execute it from the java code. Another option if you want to only run 1 command you
Postman returns null value after a successful post request
When I do a post request on Postman I receive a “200 OK” status. But doing a get request returns null JSON values This is my user class The UserDaoService class and the controller This is the post request I make I didn’t pass in an ID because that is covered in the backend. On making a get request the
How to collect data to List from Map using java Stream API?
I have map Map<Nominal, Integer> with objects and their counts: And I need to get such a List<Nominal> from it: How can I do this using the Stream API? Answer We can use Collections::nCopies to achieve the desired result: Ideone demo Remark In the demo, I changed the key-type of the Map from Nominal to Object since the definition of
Don’t want to use the initialize the given height/weight on the draw() method, Instead I want to use the main driver
So, I been trying to figured out how can I able draw the shape of a rectangle by given the height and the width on the main driver, but I was having trouble because somehow I couldn’t able to draw the rectangle, instead I was able to put the values inside of the draw() methods. For the draw() method was
spring boot boostrap bean override
In my spring.factories I have such a definition: In MyBootstrapConfiguration I have : Now in my test (junit-5 and @SpringBootTest), I would like to override this bean. Notice the @ConditionalOnMissingBean… If I can hook somehow to a “before” my bootstrap is started, to provide that ApiClient, that method apiClient would obviously not be called and I would be happy. Please
When using JOption Pane, During Cancelled JOption Pane, NullPointerException occurs
I have data in jTable1. I attempted to send them to jTable2 , after calculating by value entered to JOption Pane. But when I clicked on cancelled button on JOption Pane program making error. Line 80 in my code is I need help to solve this problem. Thanks in advance. Code is shown below Stack Trace shown below Answer I
Why my query return empry list and gives no error? Java Spring Jpa Repository
Here is my entity class: Here is my Repository: And my controller: Here is my Database: My Database Edit: Here is my ErgebnisseRequest class: So the repository.findAll() gives me all the data from the database. But when i am trying to search by Material it gives me a emptylist and no error. I try all of it like changing the
Is this the correct way to extract counts from a Concurrent Hash Map without missing some or double counting?
Working on something where I’m trying to count the number of times something is happening. Instead of spamming the database with millions of calls, I’m trying to sum the updates in-memory and then dumping the results into the database once per second (so like turning 10 +1s into a single +10) I’ve noticed some strange inconsistency with the counts (like
How to use methods in extended class and use them in main class
I am trying to create a method in an extended shape class and use it but it doesn’t work. Here is code what I am trying to do: This isn’t complete code, most of it is removed. I have searched over web and couldn’t find anything so came to ask the question. Any help please. Answer means that the variable
Split by regex vs multiple one char splits performance
I compared splitting string by regex and by multiple one char splits, using this benchmark and got these results Why splitting by regex is slower than splitting by multiple individual characters, even though they produce the same result? Note: I ran the code on JDK 14.0.2 I used JMH 1.28 Answer String.split implementation has the optimized fast path for splitting