1,916,308 questions
Best practices
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votes
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8
views
Centralized error handling for FeignClient: ErrorDecoder, Resilience4j, and custom exceptions with PathVariable context
I am developing a Spring Boot application that consumes external APIs via spring-cloud-starter-openfeign. I am also using Resilience4j for Circuit Breaker and Retries.
My goal is to implement a ...
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Advice
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votes
1
replies
25
views
VSync in pure Java
Is it possible to access the VSync signal in pure, portable, documented, official Java?
ExtendedBufferCapabilities.VSyncType.VSYNC_ON); obviously uses the internal class sun.java2d.pipe.hw....
- 12k
0
votes
0
answers
18
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Sonar Gradle task fails with No such property: SNAKE_CASE for class: com.fasterxml.jackson.databind.PropertyNamingStrategy
I am running my project in vela and during the sonar task it is failing with No such property: SNAKE_CASE for class: com.fasterxml.jackson.databind.PropertyNamingStrategy
No where in the code base are ...
- 183
1
vote
1
answer
31
views
java.lang.NoClassDefFoundError: com/mongodb/client/MongoClients
I've been making a minecraft papermc plugin and I ran into an issue trying to add MongoDB to my project using Gradle. I followed the "Getting Started" steps with Java Sync, but I kept ...
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Tooling
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votes
2
replies
29
views
Free virtual try-on API for a mobile app (student project)?
I’m working on an Android (Java) mobile app for a school project, and I’m trying to integrate a virtual try-on feature (clothes fitting on user images).
I’ve explored a few options on platforms like ...
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1
vote
0
answers
56
views
Metamodel generator loses generic type parameter for Set<String> in Hibernate 7
In Hibernate 6, a field annotated with @Column @NotNull private Set<String> issueTypeLabels mapped to a Postgres VARCHAR ARRAY column generated:
public static volatile SingularAttribute<...
- 144
0
votes
1
answer
59
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Problem with searchable combo box in Java Swing
I have made a searchable combo box for use in a Java Swing program.
Here is how I would like it to work:
When clicked, it opens up the options list and enables typing in the box to let the user ...
- 57
Advice
0
votes
4
replies
121
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How do I get this Java Applet game with multiple .jar and HTML files to run?
I want to play this obscure Java-based game from 2000, one that was graciously provided by the Internet Archive (https://archive.org/details/diamond-mine-java).
The contents of the game's files look ...
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0
votes
1
answer
51
views
How to propagate Correlation ID from ThreadLocal to Kafka Headers in a Spring Boot 3 distributed system?
I am implementing an observability layer in a Spring Boot 3.2.0 ecosystem to ensure distributed tracing across multiple microservices.
I have a ContextInterceptor that captures a correlation-id from ...
1
vote
1
answer
66
views
Hibernate is not using custom implementation of PhysicalNamingStrategy
In my unit test I want to use my custom implementation of PhysicalNamingStrategy:
public class CustomPhysicalNamingStrategyStandardImpl implements PhysicalNamingStrategy {
@Override
public ...
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-1
votes
0
answers
38
views
how to detect the aop time when using arthas trace command
I am using arthas https://github.com/alibaba/arthas to tracing the function time, this is the command look like:
trace com.baomidou.mybatisplus.core.mapper.BaseMapper selectOne -n 5 --skipJDKMethod ...
- 41.2k
0
votes
2
answers
60
views
Cannot set initial app window size in javafx
I'm not able to set the initial window size. The app always displays 200x200.
public class tcase extends Application
{
@Override
public void start(Stage primaryStage)
{...
- 1,732
Advice
1
vote
2
replies
120
views
In 2026, is MERN stack still a good choice for getting a software job, or should I switch to Java Spring Boot?
I am currently a 3rd-year Computer Engineering student from a tier-3 college in India. I know basic Java, DSA, and I have started learning web development.
I am confused about career direction because ...
-1
votes
0
answers
62
views
Flyway is not creating the tables when the application starts
I configured my spring application to interact with flyway for a data migration but flyway seems not to be working. My application.properties file is in the resources package
spring.application.name=...
- 41
Advice
0
votes
3
replies
132
views
How to measure the memory cost of lambdas in Java 25?
If I run Java 25 JShell with Java Object Layout library (JOL) without any JVM settings and measure the memory cost in bytes of a Predicate<String> I see the following:
$ jshell --class-path ~/....
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