I am trying to find characters that occur exactly once in a string, where the string contains only letters. Here’s my code: public static void main(String[] args) { int count=0; Scanner sc= …
Can a YAML value string be evaluated in Java?
Is it possible to pass Java code as a value in a YAML file. For example, something like this: — dueDate: “DueDateCalc()” DueDateCalc() might be a method defined in the Java code that …
Application source bundle doesn’t work when uploaded to AWS Elastic Beanstalk
I’m trying to upload a Java/Spring Boot app that runs in a Linux 2 Coretto 11 environment. Everything worked fine when I uploaded the standalone JAR files, but I started creating an application bundle instead so I could configure the environment, specifically client_max_body_size. It looks like the app …
Java generics: Map nested json response to Java objects
Scenario: I’m working with an unusual external API in which every attribute is a map with multiple values. In order to convert this response into simple Java objects, I had to do some dirty unboxing. Below is one of the typical java class. As you can see how I’m unboxing data from response and map…
Redisson RRingBuffer capacity cannot be changed dynamically under the same key
currently I’m working on software where I would like to use Redis to store some data. Specifically, I would like to use the RRingBuffer where I initially set capacity and it can change during the runtime. My idea was that a new RB is created and the data from oldRB is moved to newRB For example, maybe t…
405 Method Not Allowed when deploying artifact to Nexus
I am deploying an artifact to a Nexus snapshot repository that allows redeployment, using the maven command: but I have this error: Answer I have never seen a mvn deploy:deploy-file to a nexus/repo/browse URL: browse should not be used for deploying files, only for… browsing them. A typical call would b…
Dependency injection with @Inject and Interface in Quarkus
I’m trying to resolve dependency injection with Repository Pattern using Quarkus 1.6.1.Final and OpenJDK 11. I want to achieve Inject with Interface and give them some argument(like @Named or @Qualifier ) for specify the concrete class, but currently I’ve got UnsatisfiedResolutionException and not…
Collect a stream after an objects attribute exceeds a certain threshold
Assume I have a list of custom objects MaDate with a field temp of type int. I want to use streams to get all items after the first hits a certain threshold MaDate.temp >= 10 . And Ideally the result list should contain the last 3 elements having temp values [10,3,9]. I can not use filter because this woul…
How to sort two arrays with one being sorted based on the sorting of the other?
So I have encountered this problem a lot of times. Let me explain. Say I have these two arrays: A1={1,2,3,4,5,6,7,8,9,10}; and A2={1,2,3,0,2,1,1,0,0,0};. What I require is this: When I sort A2, whatever swapping and shifting of elements takes place in A2, the same should take place in A1 as well. Basically I …
Mac OS Catalina “to open eclipse you need to install the legacy java se 6 runtime”
PROBLEM : Although I successfully installed Java JDK Kit and Eclipse on my MacOS Catalina 10.15, I cannot launch Eclipse. I get this error message: “To open eclipse you need to install the legacy java se 6 runtime” BACKGROUND : I am starting to learn java programming. I wanted to install java and …