Android Studio gives the warning: Unboxing of ‘idCollisonMap.get(currentId)’ may produce ‘NullPointerException’ even though I am checking if the key exists before I perform the Map.get(). Am I actually in danger of running into a null pointer exception? My understanding is that .containsKey() check would prevent this from happening. Code snippet sample output: [{T143=1, T153=3, T141=1}] Answer Assuming nothing else is
Should I use GET or PATCH for requesting info while also updating the resource [closed]
Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 1 year ago. Improve this question I am making a Blackjack service in Java using Spring, and i have methods for game moves like Hit, Stand, etc.
Multiple instances of a bean of one class filled with values from application.properties
I intend to write some HealtCheckContributors for a Spring Boot application using spring-boot-actuator. Hence, I implemented two of them. they are intended for checking the health of different apps, of course, but have a nearly identical structure, except the configuration properties, … SonarQube complains about that and I wonder if it is possible to have a single health check class
Inplementing boolean values [closed]
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed last year. Improve this question I am trying to make the code more efficient, but don’t know how to apply it in my code. What I have in mind is changing
Convert Flux into Flux
I am working on spring webflux file upload. From the controller I want to upload the file on amazon S3 bucket. So in the controller I received following object And from the FilePart.content() I can get My question is how can I convert this Flux<DataBuffer> into Flux<ByteBuffer>. I mean into the following object Answer You can simply use the org.springframework.core.io.buffer.DataBuffer#asByteBuffer():
Correct way to decrement an AtomicLong by a certain delta
Given an AtomicLong object, what is the right way to decrement the value by a delta? Option 1 Option 2 While both give the desired result, I want to understand under what circumstance will they not represent the desired behavior i.e to decrement a long value atomically? (One drawback of the second approach for example could be the negative sign
Separate List in Java
I need help on separating List. I am really new to this I have a code that results to this [[a, b, c, d, e], f] setOfLetters() is from a query My question is how can I make my result like this? [a, b, c, d, e, f] Is it by using for loop? Or anything you can suggest. Thanks
Plugin jsonschema2pojo: Properties are shown as required but they should be optional
i have a personschema which has e.g. those two fields: Then I have another schema which extends the person schema. In this schema, I want those two properties (birthCountry and birthday) to be optional and only the name to be mandatory. I’ve tried it like that: But unfortunately, in the API-Docs they are still remarked as mandatory. Answer The issue
Is there a way to fix a Test which should return a string made of ResultSet?
I have a function which creates a string from a result set. And the one that sends messages. You can see them below I need to write a test which calls sender with the parameter string which was generated before. That’s what I have for now: Unfortunately, I am told: Why is the reportData empty? How can I fix this?
How to select by DATE type in jdbc using oracle DB?
In my Database created_date colum of data type is DATE and I want to select by DATE type in jdbc using ORACLE database, but when I run this method like this , I have getting this error. How to solve this problem? I have tried many things, but coludn’t solved. Answer The main problem here is that you are binding