I have an object from this Class: And I would like to write the JAVA method: private List<List> extractNames(Person ancestor) which gives back all the names of each branch of the tree: Do you have an idea, how I could do it ? Answer Update: Removed the dependency to lombok The relevant algorithm part is…
Tag: java
Spring Cloud Contract: how to prevent Producer to break consumers?
I am new to Spring Cloud Contracts and recently I was able to generate Producer contracts, and write a test on the consumer side using the stubs installed on my local maven repo. If I break the contract on the Producer side and then install the new stubs, as expected if I run the consumer tests it will fail. …
Minecraft Fabric: ‘net.minecraft.util.Identifier net.minecraft.util.registry.RegistryKey.method_29177()’
I launched fabric 1.18.2 template from official repository. I use java 17 (adopt open jdk, tried to use open-jdk). Error i get: Answer run in terminal : ./gradlew clean ./gradlew –refresh-dependencies Then reload gradle project in ‘Gradle’ tab.
Spring @Valid annotation not working as validating dto fields?
I have checked many other questions about it but I cannot find the solution, where am I missing ? Here is the controller method: And my dto is: My problem is (maybe @Valid is actually working I am not sure), when I debug it with the postman request: I am expecting some kind of message like “Id cannot be…
Failed to load a service: io.micronaut.context.exceptions.BeanContextException: | Micronaut
I have just created a file named TransactionsRepository.java. I am not calling this class anywhere as of now TransactionsRepository.java Whenever I run ./gradlew run, it runs perfectly, but the moment I uncomment this line, it throws an error ERROR Exception in thread “main” java.lang.RuntimeExcep…
management.endpoint.health.group.readiness.include=* bug – Spring Boot Actuator
A bug in Spring Boot Actuator exists whereby if certain properties are used, management.endpoint.health.probes.add-additional-paths=true doesn’t work in exposing the readiness endpoint at /readyz and the liveness endpoint at /livez. You get a whitelabel error page. This application has no explicit mappi…
Best way to remove characters at certain positions in a Java string or stringbuilder
Constraint – $ does not appear in the input string. Is there a simpler way to do this? Answer You can remove the first loop like this: The overall time complexity might be different depending on what type of List you use.
JFrame.addMouseListener doesn’t register clicks
I am currently writing an application in java that needs to take in input from the user. I have tried many ways to implement the input but none of them work. I am rendering objects with the graphics interface if that helps. I have tried a couple of methods to implement mouse interaction: And However when I ru…
Apache Beam Split to Multiple Pipeline Output
I am subscribing from one topic and contains different event types and they pass in with different attributes. After I read the element, based on their attribute, I need to move them to different places. This is the sample code look like: Basically I read an event and filter them on their attribute and write …
Command Injection In Java
I am new in java, a self learner. I came accross the following issue and was stuck. In fact I am trying to sanitize this code against command injection but failed to understand how. I know how to sanitize user input but this specific has to do with command executed in the OS and I am not sure how anyone