Java jar not running

[tight pebble]

please help

[cold citrus]

I uploaded your attachments as Gist.

<@&987246399047479336> please have a look, thanks.

[cold citrus]

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There could be several reasons why a Java JAR file is not running. Here are some troubleshooting steps you can try:

1. Check if Java is installed: Make sure that Java is installed on your system and the PATH environment variable is set correctly. You can verify this by opening a command prompt and typing "java -version". If it shows the Java version, then it is installed correctly.

2. Check file associations: Ensure that JAR files are associated with the Java Runtime Environment (JRE) on your system. To do this, right-click on the JAR file, select "Open with", and choose the appropriate Java executable (e.g., java.exe or javaw.exe).

3. Check for errors: Open a command prompt, navigate to the directory where the JAR file is located, and try running it using the "java -jar filename.jar" command. If there are any error messages displayed in the console, they can help identify the issue.

4. Update Java: If you have an older version of Java installed, try updating to the latest version as older versions may have compatibility issues.

5. Check for dependencies: Some JAR files require additional libraries or dependencies to run properly. Make sure that all required dependencies are present in the same directory as the JAR file or included in its classpath.

6. Disable antivirus/firewall: Antivirus or firewall software may sometimes interfere with running JAR files. Temporarily disable them and try running the JAR file again to see if it resolves the issue.

7. Re-download or recompile: If you obtained the JAR file from a third-party source, it's possible that it may be corrupted or not built correctly. Try re-downloading it from a trusted source or recompiling it from its source code if available.

If none of these steps resolve your issue, please provide more specific details about any error messages or symptoms you are experiencing, as well as the operating system and Java version you are using.

[tardy mason]

are you using libs ?

[tight pebble]

yes

you mean libraries yes

i have tried everything

nothing is working

[tardy mason]

which lib ? how are you using those libs ?

[tight pebble]

actually no i am not using any library

except there is this one dependency " bouncy castle "i am not sure if it s the problem

[tardy mason]

what is this ?

[tight pebble]

crypto graphy

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>

<groupId>org.example</groupId>
<artifactId>NodeTest</artifactId>
<version>1.0-SNAPSHOT</version>

<properties>
    <maven.compiler.source>21</maven.compiler.source>
    <maven.compiler.target>21</maven.compiler.target>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.30</version>
        <scope>compile</scope>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.bouncycastle/bcprov-jdk15on -->
    <dependency>
        <groupId>org.bouncycastle</groupId>
        <artifactId>bcprov-jdk15on</artifactId>
        <version>1.70</version>
    </dependency>
    <dependency>
        <groupId>com.maxmind.geoip2</groupId>
        <artifactId>geoip2</artifactId>
        <version>4.1.0</version>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>2.0.9</version> <!-- Replace with the latest version -->
    </dependency>
    <dependency>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-classic</artifactId>
        <version>1.4.11</version> <!-- Replace with the latest version -->
    </dependency>


</dependencies>

</project>

[tardy mason]

ah so you are using maven

[tight pebble]

yes

[tardy mason]

so how are you creating the jar ?

there is nothing in the pom

which allow you to create a fat jar

[tight pebble]

create an artificat and built it

[tardy mason]

?

[tardy mason]

eclipse artifact ?

[tight pebble]

intellij

[tardy mason]

please use maven

don't use your ide for that

[tight pebble]

project strucute > artifacts > add > apply

[tardy mason]

yes don't do that

use maven

[tight pebble]

then go to build > artifacts > and build

[tight pebble]

okay

i ll try it

[tardy mason]

and

what is in the jar ?

how are you handling the libs ?

are the libs in the jar ?

or outside ?

@tight pebble

[tight pebble]

no libs

only dependencies

[tardy mason]

that's libs

well, kinda

[tight pebble]

i am building the jar

and that s it

a single file .jar

[tardy mason]

but what do you do of the depenpencies ?

do you put them in the jar or not ?

[tight pebble]

i thought it s builded with the file

[tardy mason]

with the file ?

[tight pebble]

with the jar

i mean

[tardy mason]

so you want to put the dependencies in the jar ?

[tight pebble]

i dont know i thought when you build the jar file the dependencies gets build with it

is this right?

[tardy mason]

wdym by "build with it"

[tight pebble]

included in the jar file

[tardy mason]

so you want to put the dependencies in the jar file ?

right

so you want a fat jar, or uber jar

[tight pebble]

what s the best

[tight pebble]

ah

okay

let s go with file in the jar

[tardy mason]

it's a jar which contain dependencies

[tight pebble]

fat jar

[tardy mason]

that's called a fat jar or uber jar

[tight pebble]

thx for the knowledge

[tardy mason]

so

[tight pebble]

yeah fat jar

lets go with it

[cold citrus]

How to create a executable fat-JAR
Not that those Examples are based on best-practices and are not the only way to achive this, but considered to be the best.

Gradle
Example based on the Kotlin-DSL, for Groovy examples see the wiki

1. Add the plugin com.github.johnrengelman.shadow like this id("com.github.johnrengelman.shadow") version "7.1.1" (Version may be different)
2. Set your Main-Class with the application plugin like this:

application {
  mainClass.set("org.togetherjava.Launcher")
}

3. Run gradle shadowJar

Maven

1. Add the shade plugin org.apache.maven.plugins:maven-shade-plugin in the plugins Block (Create it if it does not exist). Replace with your Main-Class

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-shade-plugin</artifactId>
    <executions>
        <execution>
            <goals>
                <goal>shade</goal>
            </goals>
            <configuration>
                <shadedArtifactAttached>true</shadedArtifactAttached>
                <transformers>
                    <transformer implementation=
                      "org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                        <mainClass>org.togetherjava.Launcher</mainClass>
                </transformer>
            </transformers>
        </configuration>
        </execution>
    </executions>
</plugin>

2. Run maven package
   See this post for other ways.

IDE's
Note that these ways are not recommended, please use one of the 2 build-tools above.

IntelliJ
See this post

Eclipse
See this post

Netbeans
See this post

alathreon • used /tag id: executable-Jar · Oct 30, 2023, 9:32 PM

Create JAR from modules dialog | IntelliJ IDEA

Create JAR from modules dialog | IntelliJ IDEA Documentation

Create executable Jar file under Eclipse

I created a Java application and I want to create jar file for this application. This application imported other external jar files by Build Path>Add External Jar File.
How can I generate executabl...

[tardy mason]

so

by default

maven only create a shallow jar, without dependencies and which isn't runnable

here you want a runnable jar with dependencies

[tight pebble]

okay

so how can i fix it

[tardy mason]

?

[tight pebble]

the above is right?

[tight pebble]

this one?

[cold citrus]

To run a maven project, you first need to add this following plugin:

<plugin>
  <groupId>org.codehaus.mojo</groupId>
  <artifactId>exec-maven-plugin</artifactId>
  <version>3.1.0</version>
  <goals>
    <goal>java</goal>
  </goals>
  <configuration>
    <mainClass>your.MainClass</mainClass>
  </configuration>
</plugin>

Don't forget to replace the class name by the correct one.
Then run mvn exec:java

Maven automatically creates a shallow jar (without any lib) and without a manifest by default, in target.
To create a runnable fat jar, you can use this following plugin:

<plugin>
  <artifactId>maven-assembly-plugin</artifactId>
  <version>3.5.0</version>
  <configuration>
    <descriptorRefs>
      <descriptorRef>jar-with-dependencies</descriptorRef>
    </descriptorRefs>
    <archive>
      <manifest>
        <mainClass>your.MainClass</mainClass>
      </manifest>
    </archive>
  </configuration>
  <executions>
    <execution>
      <id>make-assembly</id>
      <phase>package</phase>
      <goals>
        <goal>single</goal>
      </goals>
    </execution>
  </executions>
</plugin>

Don't forget to replace the class name by the correct one.
Then run mvn package to build it, then go in target, and run java -jar MyJar-jar-with-dependencies.jar and don't forget to replace MyJar by the jar name. Don't mix with the other jar which is the shallow jar without manifest.

alathreon • used /tag id: maven-run · Oct 30, 2023, 9:34 PM

[tardy mason]

this one is better

so

there are two things you might want

the first plugin is for running your app, you should always have it, you can simply run your app with mvn exec:java from cmd

and then, the second one is what you want to create a runnable fat jar

@tight pebble

[tight pebble]

these goes in the pom file?

[tardy mason]

yes

in the plugins section

which is itself in build

which is itself in project

[tight pebble]

how many years of experience do you have

[tardy mason]

not much

why ?

[tight pebble]

5 3 ?

anyways thx you very much

how can i help you

[tardy mason]

what

is your problem solved ?

[tight pebble]

i ll work on it

[tardy mason]

can't you do it now ?

[tight pebble]

yes i can

works like a charm

thx man

@tardy mason