Why cant i open a JAR? | Java Community | Help. Code. Learn. | Page 1

cursive wraithBOT Jun 19, 2024, 10:25 PM

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slender ridge Jun 19, 2024, 10:25 PM

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https://cdn.discordapp.com/attachments/1253113360359100558/1253113360535519262/image.png?ex=6674ac42&is=66735ac2&hm=ef2af4bcd2c5e71b25fb76b20182fdbf4237bcdbd0678edfcbc4e010e3cf0f9c&

fair shell Jun 20, 2024, 12:46 AM

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Where do you got that jar from?

brazen rover Jun 20, 2024, 5:41 AM

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the jar doesnt tell java which class its supposed to run

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you need to either specify the class manually java -cp CurrencyTranslator.jar the.main.Class or get a jar that is properly set up

slender ridge Jun 20, 2024, 9:45 AM

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fair shell Where do you got that jar from?

i built it

fair shell Jun 20, 2024, 9:53 AM

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slender ridge i built it

Well, you need to build it different. How do you build it? Maven?

slender ridge Jun 20, 2024, 10:48 AM

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fair shell Well, you need to build it different. How do you build it? Maven?

I just compiled it

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And took the JAR

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With Maven

fair shell Jun 20, 2024, 11:26 AM

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You are using mvn package?

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What is the class name and package of your Main-Methode?

gray compass Jun 20, 2024, 2:27 PM

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slender ridge I just compiled it

you could use a maven plugin for building the jar correctly.

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mvn package on it's own isn't going to make it executable.

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check out maven-assembly-plugin (https://maven.apache.org/plugins/maven-assembly-plugin/)

slender ridge Jun 20, 2024, 2:35 PM

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gray compass check out `maven-assembly-plugin` (https://maven.apache.org/plugins/maven-assemb...

Is this a plugin

gray compass Jun 20, 2024, 2:35 PM

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yes

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go to the usage page for details (https://maven.apache.org/plugins/maven-assembly-plugin/usage.html)

slender ridge Jun 20, 2024, 2:37 PM

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gray compass go to the usage page for details (https://maven.apache.org/plugins/maven-assembl...

Do i need to install it from my IDE or its default plugin

gray compass Jun 20, 2024, 2:37 PM

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you add it to your pom.xml

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if you don't know how plugins work, I suggest learning about that first.

slender ridge Jun 20, 2024, 2:40 PM

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From where

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I dont understand anything

gray compass Jun 20, 2024, 2:41 PM

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well do you have a pom.xml?

slender ridge Jun 20, 2024, 2:42 PM

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Yep

gray compass Jun 20, 2024, 2:42 PM

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so the usage page walks you through adding the plugin to your pom.xml

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just read the whole thing and ask any questions if you're stuck

slender ridge Jun 20, 2024, 2:43 PM

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Why is it inside of build section

gray compass Jun 20, 2024, 2:44 PM

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because that's the rules lol

slender ridge Jun 20, 2024, 2:54 PM

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gray compass because that's the rules lol

I didnt understand <descriptorRefs>

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I understand the other ones but not this one

gray compass Jun 20, 2024, 2:55 PM

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are you looking for a justification as to why it's there?

slender ridge Jun 20, 2024, 2:55 PM

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Yep

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Is it like the thing which compiles project and dependencies

gray compass Jun 20, 2024, 2:55 PM

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 If you want to use one of the prefabricated assembly descriptors, you configure which descriptor to use with the <descriptorRefs>/<descriptorRef> parameter.

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it's just semantics

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the <descriptorRef>jar-with-dependencies</descriptorRef> is a "prefabricated assembly descriptor" and you're just using those tags so the plugin knows that

slender ridge Jun 20, 2024, 2:58 PM

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gray compass ``` If you want to use one of the prefabricated assembly descriptors, you confi...

Why console responds me like this when i use mvn

gray compass Jun 20, 2024, 2:59 PM

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because you haven't installed maven

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try the maven wrapper in your project instead

slender ridge Jun 20, 2024, 2:59 PM

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So what is the right jar

gray compass Jun 20, 2024, 3:00 PM

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try it

slender ridge Jun 20, 2024, 3:01 PM

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it gives exception

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gray compass Jun 20, 2024, 3:02 PM

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show your manifest tags

slender ridge Jun 20, 2024, 3:02 PM

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gray compass Jun 20, 2024, 3:03 PM

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so can you show that class?

slender ridge Jun 20, 2024, 3:03 PM

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package com.example.currencytranslator;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.stage.Stage;

import java.io.IOException;

public class CurrencyTranslator extends Application {
    public static void main(String[] args) {
        launch();
    }
    @Override
    public void start(Stage stage) throws IOException {
        FXMLLoader loader = new FXMLLoader(getClass().getResource("mainscreen.fxml"));
        Parent root = loader.load();
        Scene scene = new Scene(root);
        stage.setScene(scene);
        stage.getIcons().add(new Image(String.valueOf(getClass().getResource("icon.png"))));
        scene.getStylesheets().add(getClass().getResource("firstcss.css").toExternalForm());
        Mainscreen screen = loader.getController();
        screen.changeColor();
        stage.setTitle("Currency Conversion");
        stage.setResizable(false);
        stage.show();
    }

}```

gray compass Jun 20, 2024, 3:03 PM

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ahh

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so with JavaFx there is an extra step

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you need to make a new class with a main method and have that call CurrencyTranslator's main method

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I usually call it Launcher

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then that would be your main class

slender ridge Jun 20, 2024, 3:07 PM

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package com.example.currencytranslator;

public class Launcher {
    public static void main(String[] args) {
        CurrencyTranslator.main(args);
    }
}```

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like that?

gray compass Jun 20, 2024, 3:07 PM

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yes

slender ridge Jun 20, 2024, 3:07 PM

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but didnt work

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once again

gray compass Jun 20, 2024, 3:07 PM

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make sure you updated your pom with this as the new class

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oh

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I overlooked the fact you're using the command uncorrectly

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java -jar [jar-name].jar

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this I think is still a necessary step though

slender ridge Jun 20, 2024, 3:09 PM

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gray compass Jun 20, 2024, 3:10 PM

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run ./mvnw clean package and try again

slender ridge Jun 20, 2024, 3:10 PM

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how do install this

gray compass Jun 20, 2024, 3:10 PM

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./mvnw

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the ./ is important

slender ridge Jun 20, 2024, 3:12 PM

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gray compass Jun 20, 2024, 3:13 PM

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hmmm

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well I guess just use your IDE to run the commands

slender ridge Jun 20, 2024, 3:13 PM

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yep i did it

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like that

gray compass Jun 20, 2024, 3:14 PM

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yes

slender ridge Jun 20, 2024, 3:15 PM

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i do it like that but still didnt work

gray compass Jun 20, 2024, 3:15 PM

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the same error?

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can you show your entire pom.xml file?

slender ridge Jun 20, 2024, 3:16 PM

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<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.example</groupId>
    <artifactId>CurrencyTranslator</artifactId>
    <version>1.0-SNAPSHOT</version>
    <name>CurrencyTranslator</name>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <junit.version>5.10.0</junit.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.openjfx</groupId>
            <artifactId>javafx-controls</artifactId>
            <version>22-ea+11</version>
        </dependency>
        <dependency>
            <groupId>org.openjfx</groupId>
            <artifactId>javafx-fxml</artifactId>
            <version>22-ea+11</version>
        </dependency>
        <dependency>
            <groupId>org.json</groupId>
            <artifactId>json</artifactId>
            <version>20240303</version>
        </dependency>

        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-api</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-engine</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>9</source>
                    <target>9</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-assembly-plugin</artifactId>
                <version>3.6.0</version>
                <configuration>
                    <archive>
                            <manifest>
                                <mainClass>com.example.currencytranslator.Launcher</mainClass>
                            </manifest>
                    </archive>
                    <descriptorRefs>
                        <descriptorRef>jar-with-dependencies</descriptorRef>
                    </descriptorRefs>
                </configuration>
                <executions>
                    <execution>
                        <id>make-assembly</id>
                        <phase>package</phase>
                        <goals>
                            <goal>single</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>

    </build>
</project>```

gray compass Jun 20, 2024, 3:21 PM

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I don't see anything wrong there. if you're up to sending the entire codebase I can look at it

novel warren Jun 20, 2024, 3:21 PM

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I have experienced this same error. Many programs can fix this issue, but I can help you. First make sure everything is spelled right. Onetime I misspelling main class by one letter and it failed. How about checking other resources on popular platforms like github/replit for help.

slender ridge Jun 20, 2024, 3:21 PM

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https://github.com/limpeex/Currency-Conversion

GitHub

GitHub - limpeex/Currency-Conversion: An application where you can ...

An application where you can convert three different foreign exchange rates: TRY, USD and EUR. - limpeex/Currency-Conversion

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It is this except pom is old

novel warren Jun 20, 2024, 3:22 PM

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it is really annoying this error, even tryed opening the file my self with replacing it with .zip instead of .jar and debuged the issue, although it still didn't work

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what program are you using

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it looks like one by jetbrains or maybe eclipse iDE

slender ridge Jun 20, 2024, 3:22 PM

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Intellij ide

novel warren Jun 20, 2024, 3:23 PM

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well how are you compiling it?

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are you using the built in jar executable or doing it manually?

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also most jars require java -jar YourJar.jar

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to run it if it is not an executable jar

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VSCode's RedHat extension for VSCode obviously has a built in java: export to compile it as well

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and it looks like you are using mvnw?

slender ridge Jun 20, 2024, 3:24 PM

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yep

slender ridge Jun 20, 2024, 3:24 PM

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novel warren well how are you compiling it?

with maven

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clean and package

novel warren Jun 20, 2024, 3:25 PM

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I found this: com.example.currencytranslator/com.example.currencytranslator.CurrencyTranslator

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although the CurrencyTranslator .class or .java does not exist?

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is this a typo, or is it auto compiled into the folder first?

slender ridge Jun 20, 2024, 3:26 PM

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novel warren I found this: com.example.currencytranslator/com.example.currencytranslator.Curr...

That is the old one i didnt even use maven to compile it i just was up to run it via IDE

novel warren Jun 20, 2024, 3:26 PM

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that would make more sense

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so you use maven to compile your java files?

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has this happened before?

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or is this the first time

slender ridge Jun 20, 2024, 3:27 PM

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No i somehow was able to make it executable one time but i copy pasted it and dont remember when i did it

slender ridge Jun 20, 2024, 3:27 PM

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novel warren so you use maven to compile your java files?

i moslty used it for dependencies

novel warren Jun 20, 2024, 3:28 PM

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how about this

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this is the only way to debug your code

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first try to make a duplicate of your jar file

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to work on

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rename the extension to .zip

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every jar file is just a comipled .zip file that is runnable through java

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go into the MANIFEST.MF in META-INF folder

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(if it exists)

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and take a look inside

slender ridge Jun 20, 2024, 3:29 PM

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i tried it

novel warren Jun 20, 2024, 3:29 PM

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the main class should be similar to Main Class: yourcalsspath

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sorry, I meant MainClass

slender ridge Jun 20, 2024, 3:30 PM

#

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I think it is about javafx

novel warren Jun 20, 2024, 3:31 PM

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question, in any of your code, is there a public static void main(String[] args) {}?

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because it talks about the main class

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question, did you test your code and see any typos as well?

slender ridge Jun 20, 2024, 3:32 PM

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novel warren question, did you test your code and see any typos as well?

yep

slender ridge Jun 20, 2024, 3:32 PM

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novel warren question, in any of your code, is there a public static void main(String[] args)...

no checked

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is shading still available on maven?

novel warren Jun 20, 2024, 3:33 PM

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I don't know, I don't keep up with maven too much

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but if you are using IntelliJ IDE, have you tried using the auto jar compiler

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it makes it so then you won't have to use the java -jar function

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and it is runnable like an exe

slender ridge Jun 20, 2024, 3:33 PM

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novel warren Jun 20, 2024, 3:35 PM

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question, when comipling, can you provide the code from the manifest.mf

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most problems occur there like in the image on your post

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and all other times with the no manifest attribute

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it most likely is not being referenced correctly or it is not in it's correct place

gray compass Jun 20, 2024, 3:37 PM

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I'm going to send a pull request

novel warren Jun 20, 2024, 3:38 PM

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@slender ridge , can you provide the exact cmds you use to compile/build/try to run it?

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it might be caused there

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I FIGURED OUT A WAY TO FIX THIS!

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first I improved the pom.xml to be a little cleaner and more accurrate

gray compass Jun 20, 2024, 3:43 PM

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I created a working fork

novel warren Jun 20, 2024, 3:43 PM

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also it may require a few more things from maven

slender ridge Jun 20, 2024, 3:43 PM

#

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What is this i ddnt get this

gray compass Jun 20, 2024, 3:44 PM

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that's for creating an image

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it's like to create native images

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not jars

novel warren Jun 20, 2024, 3:44 PM

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wait a second, that t in translator is also supposed to be Uppercase

gray compass Jun 20, 2024, 3:45 PM

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but seriously, merge my fork and you good.

novel warren Jun 20, 2024, 3:45 PM

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man, code is really case sensitive

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why can't code just be easy!

slender ridge Jun 20, 2024, 3:48 PM

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gray compass I created a working fork

wdym

novel warren Jun 20, 2024, 3:48 PM

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where were you limpeex?

gray compass Jun 20, 2024, 3:48 PM

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add me to the project so I can create a pull request and you can merge it

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I configured it for you

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my username is Carter907

slender ridge Jun 20, 2024, 3:50 PM

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how do i do that

gray compass Jun 20, 2024, 3:51 PM

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Go to your repository's settings, then to "Manage Access", and click on "Invite teams or people". Enter their GitHub username or email address and send the invitation.

slender ridge Jun 20, 2024, 3:54 PM

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i sent

gray compass Jun 20, 2024, 3:58 PM

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there I merged it for you

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now run mvn clean package and run the jar in the target folder

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I set it to jdk 18 if that's not what you're using. use something different but you have everything you need to create an execuable jar file now.

novel warren Jun 20, 2024, 4:10 PM

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Did you fix the project?

slender ridge Jun 20, 2024, 4:44 PM

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gray compass I set it to jdk 18 if that's not what you're using. use something different but ...

can you try to do it

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it still didnt work for me

gray compass Jun 20, 2024, 4:45 PM

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what did you do exactly?

slender ridge Jun 20, 2024, 4:45 PM

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opened the project and did clean and package

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and then java -jar <file>

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from ide terminal

gray compass Jun 20, 2024, 5:44 PM

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slender ridge and then java -jar <file>

what is the error?

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make sure you actually pulled from the remote repository

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I updated the remote repository

novel warren Jun 20, 2024, 5:50 PM

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I'm back!

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you guys figure out the issue yet?

slender ridge Jun 20, 2024, 5:59 PM

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gray compass what is the error?

It says unable to access jarfile

slender ridge Jun 20, 2024, 5:59 PM

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novel warren you guys figure out the issue yet?

nope

novel warren Jun 20, 2024, 5:59 PM

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can you show me the error?

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maybe I can help?

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it took me a long time to figure mine out by I got through it and this should be easy

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for me

slender ridge Jun 20, 2024, 5:59 PM

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novel warren Jun 20, 2024, 6:00 PM

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well are you in the same dir (directory) as that jarfile

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I have seen this message before

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it could also just be you misspelling it

slender ridge Jun 20, 2024, 6:01 PM

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ah wait

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worked

slender ridge Jun 20, 2024, 6:01 PM

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novel warren well are you in the same dir (directory) as that jarfile

yep you solved it

novel warren Jun 20, 2024, 6:01 PM

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so what was the problem?

slender ridge Jun 20, 2024, 6:01 PM

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wait lemme try it from cmd

novel warren Jun 20, 2024, 6:02 PM

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it should work

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just use the same cmd

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in the same dir

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...

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did it work?

slender ridge Jun 20, 2024, 6:04 PM

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novel warren in the same dir

yep i was in the wrong directory

novel warren Jun 20, 2024, 6:04 PM

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well, YAY!!!!! ya figured it out

slender ridge Jun 20, 2024, 6:04 PM

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but how am i going to open it up by double click

novel warren Jun 20, 2024, 6:04 PM

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well that is an executable jar file

slender ridge Jun 20, 2024, 6:04 PM

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novel warren Jun 20, 2024, 6:05 PM

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yeah, same error, just try using a .bat file with like (at symbol in emails)echo off (new file) java -jar your file.jar

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then run the bat, it will run the jar and it will work

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otherwise, you want it to be directly executed through double-click you may have to use outside sources like launch4j which is completely free and allows icons as well

slender ridge Jun 20, 2024, 6:05 PM

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wdym newfile

novel warren Jun 20, 2024, 6:06 PM

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I mean new line

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so like:

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@echo off

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java -jar yourfile.jar

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in that exact order

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also, a .cmd would work with this and a .sh cmd for this would just be the same thing without @echo off part

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hope this helps!

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did it work?

slender ridge Jun 20, 2024, 6:20 PM

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yeah it works but how do i open it by double clicking

novel warren Jun 20, 2024, 6:21 PM

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well, like I said you will probably have to use launch4j, but I have a tutorial for Intellij IDEA AND IDE and ECLIPSE IDE and how to use launch4j for the executable instead of .jar and have an icon

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I will find the video and paste the link..... after I find it

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found it!

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Here is link: https://www.youtube.com/watch?v=jKlyHG-zbjk&t=382s

YouTube

Bro Code

Java executable (.jar) ☕

Java executable jar

#java #executable #jar

0:57 Eclipse .jar
2:25 IntelliJ .jar
3:47 create an icon (.ico)
5:25 executable wrapper

Create an executable jar with Eclipse IDE

Right click on Java project (pick a project with a GUI)
Export
Java , Runnable Jar file
At Launch configuration selec...

▶ Play video

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it talks everything about java executable jar

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this is what you are talking about

slender ridge Jun 20, 2024, 6:23 PM

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Okay thanks let me watch

cursive wraithBOT Jun 20, 2024, 6:23 PM

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slender ridge Okay thanks let me watch

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slender ridge Jun 20, 2024, 6:23 PM

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@novel warren

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@gray compass

novel warren Jun 20, 2024, 6:23 PM

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yeah

slender ridge Jun 20, 2024, 6:23 PM

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Thank you both for helping and your time

novel warren Jun 20, 2024, 6:24 PM

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your welcome!
it was a pleasure!

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I learned so much along my way!

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hope it helps!

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if you have any questions just DM me

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hey, why not friend request me

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so I can help you more

cursive wraithBOT Jun 20, 2024, 11:30 PM

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#Why cant i open a JAR?

Create an executable jar with Eclipse IDE