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java-help

❓︱qotw-answers

direct_x_34

1/10/2025

ID format issue as UUID String in Spring Boot with MongoDb

I created an example of Spring Boot with MongoDb. I have a problem in getting an entity by id with validation as it throws "must be a valid UUID". Here is the entity shown below ``` @Getter...

Kevin_30

1/10/2025

Spring Boot Project Manager

I am looking for a Project Manager with expertise in Spring Boot and full-stack development. General Algorithm and Proficiency in English is essential for effective task discussions. If you meet these requirements, please feel free to DM me....

lyxsca

1/10/2025

Java jre dont opening

Java jre file dont opening

MalkavianSoul

1/10/2025

the java_home environment variable does not point to a working jdk or jre. the jvm found at java_hom

Hello everyone! I encountered a similar error, please tell me how to solve it. I'm using a tool designed to extract gamecube .dat files. I will attach an archive with this tool and some .dat

SpraY

1/9/2025

Improvement of Java classes and code.

I would appreciate some help knowing how to write this code better. Im very new to Java and i have some experience with classes before but as you can see not so much... I also wanna know if The private keywords are necessary in front of every variable. Also would like to know when or when not to use "this."....

HangMan.java

nomoney4u

1/9/2025

Configuring Eclipse to use explode war with Tomcat for debugging

I'm a bit new to the Java world and am trying to configure my local environment for a new job. I was able to load my project into IntelliJ Ultimate (IJU) and am trying to replicate the same configuration but in Eclipse because it seems that the Web module/plugin for IJU is not available for IJ CE. Can anyone or @dan1st | Daniel help me configure my Eclipse for this project? Goal: Able to add breakpoint and/or hot-reload Java codes for debugging and development without having to constantly compile and deploy the war file. Thank you in advance....

switce

1/9/2025

server only running on IPv6

my mine minecraft server is only running on IPv6 and i want it to run on IPv4 (tryed using -djava.net.preferIPv4Stack=true it worked for a day and thats it)

GeneralCore

1/9/2025

"Java Virtual Machine Launcher -A Java Exception has occured" error in Maven .jar file

When I use "java -jar [file name].jar" using cmd it works, but doucle cliking the .jar file give me an error. I use maven assembly plugin, and netbeans > build with dependencies ``` <plugin> <artifactId>maven-assembly-plugin</artifactId> <version>3.7.1</version>...

asdru

1/8/2025

line numbers arent visible in CodeArea

```java public void createNewTab() { Tab tab = new Tab("Untitled"); // Create a CodeArea (RichTextFX)...

aviliocorteo

1/8/2025

why is the method not returning the value and its always returning 0?

Main.java ```java package com.functions; ...

VaygrEmpire

1/8/2025

sonarqube for scala

Anyone used sonarqube for Java and Scala project? Entering scoverage.reportPaths like below works:

scoverage.reportPaths=../target/scoverage.xml, ../target/scoverage.xml, etc

scoverage.reportPaths=../target/scoverage.xml, ../target/scoverage.xml, etc

...

coffeecat9492

1/7/2025

CI/CD help Github actions with Gradle

Sorry this isn't exactly Java related, but I'm trying to automate the Junit tests over Github actions. I don't want to push my gradle wrapper to the repository, so I'm following this: https://github.com/gradle/actions/blob/main/docs/setup-gradle.md#build-with-a-specific-gradle-version I tried adding gradle init and gradle build, but with the same results, the error is basically:

Directory '/home/runner/work/Cat/Cat' does not contain a Gradle build.

...

eyas

1/7/2025

i need help animating a sprite animation

i honestly dont know where to even start, ive been looking at a lot of youtube videos but they all look complicated and i dont understand what theyre saying. I think i have an idea of making a for loop that changes the pimages but i dont know how to do actually do it. i have the sprites ready i just need a bit of guiding

VaygrEmpire

1/7/2025

send message to slack without token

Anyone know how to send a message to slack without token anywhere in the code? Slack token looks like this:

https://hooks.slack.com/services/T00000000/B00000000/XXXXXXXXXXXXXXXXXXXXXXXX

https://hooks.slack.com/services/T00000000/B00000000/XXXXXXXXXXXXXXXXXXXXXXXX

...

Icca

1/7/2025

StackoverflowError on Login Request

Hi, i'm struggling

 [Handler dispatch failed: java.lang.StackOverflowError] with root cause

java.lang.StackOverflowError: null

...

Maxxx005

1/7/2025

Version Error

org.springframework.web.client.HttpClientErrorException$BadRequest: 400 Bad Request: "{"message":"version value should be 2021-05-21 or 2022-01-01 or 2022-09-01 or 2023-08-01 or 2025-01-01 tried all this dates still getting version error.

gregg

1/7/2025

annotation

Code： @Documented @Constraint(validatedBy = StringContainsValidator.class) @Target({ElementType.PARAMETER, ElementType.FIELD}) @Retention(RetentionPolicy.RUNTIME)...

ItzJxstChris

1/6/2025

PizzaOrder. Java

getting 3 erros on java about missing symbol

BladeTeam

1/6/2025

Changing font in drawString

I dont know how to chcange font so when i drawString it will draw it in changed font

Ferra

1/6/2025

how do i use automatic module names in vscode?

they appear as a module in the autocomplete, but always say it cant be resolved to a module

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Java Community | Help. Code. Learn.

We are a Community full of Java developers. You can come here to connect other devs, get help, help others and do many more things!

Java Community | Help. Code. Learn.

We are a Community full of Java developers. You can come here to connect other devs, get help, help others and do many more things!