Gradle jar main class I would add this tasks Do you mean fatjar? If so, you could use shadow gradle plugin: id 'com. Main' I don't really know the Netbeans specific stuff here but application plugin will provide the run task with necessary configuration to run from command line and As titled, I'd like to know how to modify the gradle. in the unzipped jar I checked that every import of the main-class is present. java -Xms6000m -Xmx7100m -jar sample. /gradlew --no-build-cache jar. gradle, the classpath is hardcoded to pick up the java classes from your build. output } I then task vh( type:Exec ) { commandLine 'java -cp libs/groovy-all-2. Commented Jan 17, 2024 at 12:09. This is how build. For more information, see the Gradle Build Language Reference or the samples in the full Gradle distribution. That is an interesting data point. kts that I can’t fix. jar If I understand correctly it is suggesting missing main class reference in manifest, but actually gradle init did add it there. jar and helloworld-0. 4. jar { manifest { attributes( 'Main-Class': 'package. Next you can choose the DSL for writing buildscripts - 1 : Kotlin or 2: Groovy. Some other hints: Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. apply plugin: 'application' Hi there. What am I missing? Since the Java launcher checks if the main class extends javafx. for adding it using CLI the following command will do the job: There are several ways to do it , please see the below code. analysis. MainClass' to '. Do you mean fatjar? If so, you could use shadow gradle plugin: id 'com. This method does not need application or any other plugins. Building a JAR file using Gradle is super simple - it handles almost all of the heavy lifting for us. jar { manifest { attributes "Main-Class": "src. Maybe post your actual JAR structure (at least related to class you want to run) and actual manifest. The fun main() function in Kotlin is not attached to any class, but You can have a complete example on stackoverflow on how to set up your build. Why creating a simple jar is hell of a task in Intellij, it was supposed to help developers! Edited. class is properly located inside the jar. class file in my jar file. I The answer by @felix almost brought me there. Main I created my project in Eclipse IDE with buildship plugin. ├── build. runtimeClasspath args =‘xx’} Executing this task with gradlew encrypt i get this message : What went wrong: Execution failed for task ‘:encrypt’. When added the following piece of code to build. example. 0 Main-Class: YoutubeList I tried every solution from other answers and still not getting it right. Gradle Builds an Empty Jar File. 967 12 12 silver badges 22 22 bronze badges. I don't understand why it doesn't find the class anymore. Run the Build Task If we haven’t already, we should first run the The application plugin does not produce a runnable JAR with Main-Class entry. Ask Question Asked 4 years, 4 months ago. Gradle Run MainClass from external dependency. Follow answered Jun 16, 2021 at 21:29. gradle file: plugins { id 'org. How should one configure the jar task of the gradle build so that does this This may hide your Main class. When prompted, select the 1: application project type and 4: Scala as the implementation language. OlixBotMain" But it should be there, package and name of the main-class are right. gradle to . 0): The main class can also be configured explicitly using the task’s mainClass property: tasks. No main class specified. partitionByUsers │ └── PartitionByUsers. Gradle's application plugin will take care of this for you. kotlin. boot. 2. 2). main=com. class file of your application Jar. This is another answer that looks similar to others, but there is a key difference: if you use a new keyword implementation in the dependencies, none of the other answers will work and you'll get an empty class path. Modified 4 years, 1 month ago. compile. mainAttributes("Main-Class" : "com. jar), but only helloworld-0. jar with Gradle (Android Studio) with dependencies. Gradle: There can be only one. But sometimes we want that uber-jar or else fat-jar, which can be run with java command: java -jar my-application. jar file will be generated under directory build/libs. txt that is generated as a part of a separate task. Hot Network Questions Is the number sum of 3 squares? How could a tropical saltwater lake, turned to freshwater, become salty again? Build jar for each main class using gradle. sad. A jar task that packages the main compiled この記事の目的ビルドツールGradleを使ってマルチプロジェクトを管理し、成果物として実行可能JARを作成する手順の備忘録です。マルチプロジェクトの管理外部JARに依存する実行可能JARの作成 Could not find or load main class with gradle generated jar file. java // has the main() method └── build. dependencies { // ensure the keyword here matches what // you have in the jar->manifest->attributes // that is "implementation" I am trying to build a Spring Boot/Gradle project and create a jar without a main class. I found this sample in Groovy: //create a single Jar with all dependencies task fatJar(type: Jar) { manifest { attributes 'Implementation-Title': 'Gradle Jar File Example', 'Implementation-Version': version, 'Main Recently I ran jar of my Spring Boot Application. jar { manifest { attributes 'Main-Class': 'Main' } } Hi, I have a plain java project with a build. Specifically, you are collecting dependencies from the compile configuration, which is deprecated and also unused in your project (you are doing it correctly with the newer implementation configuration). /gradlew clean; . 1-all. caco3. Gradle compile and jar a subset of java classes. For several purposes I create the following object like this: 一部の Class Path をスキャンするようなプログラムでは上で説明したように一つのJARにまとめてしまうと上手く動かない（たとえばSpring）．そこで単一JARの中に複数のJARをまとめて入れて，実行時に展開させることができる．そのためには Capsule を使う． You should create a fat jar. This is required because of the way Kotlin compiles to Java Bytecode. gradle jar or. apply plugin: 'application' And then specify the main class to be run: mainClassName = 'net. To make the generated JAR file executable, you need to specify the main class in the build. ' (where your Main class has a main method). Is it possible to create a jar file from such a project without having a single class with the main method? If so, how do you create such a jar. You can open command line, navigate to build/libs directory and use command below to execute the . However, whenever I run it, regardless of what I use for a Main-Class attribute, the In your build. Spring Boot’s org. Application, and in that case it requires the JavaFX runtime available as modules (not as jars), a possible workaround to make it work, should be adding a new Main class that will be the main class of your project, and that class will be the one that calls your JavaFX I need to build a jar, so I could run it from command line. If you used Maven you could see files like 'my-program-v1. 6 and Spring Boot 3. ClassNotFoundException: Main I've been looking for a solution for this for 4 days now with no success, first doing the normal Gradle build task produced a tiny 7kB jar files which obviously didn't work, then i added the jar configuration for the main class:. I've seen many people with "Could not find or load main class" errors when making jar files with Gradle. I have Spring Boot Gradle Plugin in my build. Could you help me? Edit. We will cover everything from the basics to advanced configurations to ensure you can Learn how to build a JAR file with dependencies using Gradle in three simple steps. output. Idea doesn't see my main class when I try to configure Artifact here's my Gradle : plugins { id 'java' id 'org. 69. EncryptPassword’ not enough ? You can see examples of how to create "fat" jars in the Gradle user guide. ApplicationKt' } } You can have a complete example on stackoverflow on how to set up your build. Provide details and share your research! But avoid . attributes["Class 実際にjarファイルを作成する. ApplicationKt' } } I'm using the gradle 'application' plugin to start my application. 4 I have a Java library that has a utility API that includes utilities for unit testing. kts in order to have a task to create a unique jar with all the dependencies (kotlin lib included) inside. role. Manifest-Version: 1. jar Error: Could not find or load main class com. A test task that runs the tests from src/test/java. java has the package declaration package test; Tried also. mordor. Main' I don't really know the Netbeans specific stuff here but application plugin will provide the run task with necessary configuration to run from command line and If you're creating 2 executable JAR files, each will have it's own manifest file, and each manifest file will specify the class that contains the main() method you want to use to start execution. I was able to finally get a Gradle application project working with Eclipse. class and . The problem is that when you run gradle buildLabServicesJar nothing tells gradle that the classes should be compiled first. build file that creates jar with different mainClass names, you can do something like this: shadowJar { zip64 true mergeServiceFiles() } task taskJar1(type: ShadowJar, dependsOn: shadowJar){ zip64 = true duplicatesStrategy = DuplicatesStrategy. (Perhaps the scala command does, but then you Now, when I run gradle assemble and gradle build everything is fine, but when I try to run the project (same for running the built jar in build/libs/ and for running the velotest class in IntelliJ), I get the following error: 首先在终端执行 gradle wrapper在执行 gradle build1. css ├── lol. Finally, in the last Let's create a simple main class which prints the words: "Hello World" to System. kts looks like: Could not find or load main class when running jar built with gradle. mainClassName not found which is not needed. 对于 Groovy DSL，请参阅这些答案（、）; 对于 Kotlin DSL，您可以使用以下代码片段：; tasks. jar { manifest { attributes( 'Main-Class': 'pokerhandscorer. Method 1: Placing library files beside the result JAR. name + '-' + version + '. The java command doesn't know anything about SCALA_LIBRARY_PATH. //To run the class name from command line using gradle run mainClassName = 'com. App’}}} Once you have created the Gradle build file, you can build the JAR file by running the following command: gradle buildJar. Gradle: How to create multiple jar? 3. gradle "No main class specified" even though main class exists. name} please don't run your jar file in the lib directly I build a FatJar with Gradle, but if I execute it i get "Error: Could not find or load main class de. You can add your own, either one by one or by "looping" over sourceSets. 回车，在第二行加上Main-Class：+ 空格 +main函数所在的类的类名不需要加扩展名（如不需要加 t. Add the following configuration to the jar task: manifest { attributes ( 'Main-Class': By default, the Java Library Plugin provides the jar task that packages all the compiled production classes and resources into a single JAR. sygnity. jar. 6. gradle file as follows: apply plugin: 'java' task sourcesJar(type: Jar) { from sourceSets. The basic steps are outlined in the Building Java Libraries Simple guide in the Gradle documentation. gradle file:. 在目录文件中单独找到jar包3. You have to modify build. DemoApplication</start-class> </properties> IMPORTANT In case if someone is using Gradle for the build then fix will be by adding the following lines in build. Improve this answer. jar activation-1. gradle so it would contain Main-Class attributes, but then I do receive an error: When I run gradle init with Gradle 6. In the JavaExec task, I have done the same. From what I've found on the internet, the following should work: task packageTests(type: Jar) { from sourceSets. A compileTestJava task for source files under src/test/java. no errors when I “Refresh Gradle project”), but am able to gradle clean Could not find or load main class with gradle generated jar file. This tutorial aims to provide a meticulous step-by-step guide on running a Java main class with Gradle. my. 1) but there is no . 0 Main-Class: app. The following SO question might be relevant: Multiple runnable classes inside JAR, how to run them? To set your main class on the Manifest using gradle: jar { manifest. If any of your dependancies has a Signed Jar, then it could result into that could not find or load main class: exception. MF There are ways to specify alternatively named files as a JAR's manifest Could not find or load main class with gradle generated jar file. 6. In Intellij it has Main-Class: MainFrame in the MANIFEST. isDirectory() ? it : zipTree(it) } } } with an upper case K in ApplicationKt. MyMainClass" manifest. Here I provide solutions for Kotlin DSL (build. This JAR is also automatically built by the assemble task. Can I change the plugin's pipeline-jobs // root folder ├── gradle. 1-SNAPSHOT. classes } However I am getting a - Execute command below build the . /gradlew jar which generated . kts files A class is affected if it has been changed or if it depends on another affected class. class. $ java -jar com. Then, these files must be coming from one of your dependancies when you are creating a Fat Jar. MF: Manif To set your main class on the Manifest using gradle: jar { manifest. When looking at the manifest. Main' without success. jar MainclassName I am new to gradle and I Build jar for each main class using gradle. 0 Main-Class: MyMainClass When manually copying the source manifest to the jar, it runs perfectly. ExampleApplication' } RE: gradle 5. kts for it to work. So much more pleasant when you list processes - I hate the way that a java process takes up two screens worth of a terminal output on a ps -ef, and good luck working out which of the 500 jars listed is actually the entry point. intellij-idea; kotlin; Share. gradle: When you run gradle assemble you will have 3 jars with separate set of classes. Kotlin-DSLでGradleを使っているのだが，実行可能jarを生成する方法が意外と見つからなかったので備忘録的に書き留めておく． The main class to start by executing "java -jar" --> <start-class>org. kts). And Then I run . attributes["Main-Class"] = "<your-main-class-full-path>" } Share. how to export a executable jar in gradle, and this jar can run as it include reference libraries. If you do a gradle build on App, you will get a 300 KB Jar. company. I created it using a Main class, since IntelliJ IDEA 14 asked me to add one. baeldung. PropertiesLauncher comes with a JVM argument to let you override the logical main-class called loader. I renamed (refactored) it once, but even if i changed it back it didn't work. jar -Dloader. security. One of the ways to achieve that with Gradle has already been discussed on our site. properties ├── settings. all. jar unfortunately trying to run given JAR file output is: no main manifest attribute, in build/libs/Instrumented Tests Runner. Gradle : Could not find or load main class. Hot Network Questions How to Modify 7447 IC Output to Improve 6 and 9 Display on a 7-Segment What you want to do is to create a fat jar, that will contain all classes and resources in a single jar file. xml 4 directories, 5 files 33416293 git:(master) gradle jar :compileJava :processResources UP-TO-DATE :classes :jar BUILD SUCCESSFUL Total time: 3. See details below. 1 (and IntelliJ 2018. Add a comment RE: gradle 5. I had to mark the 'Include dependencies with "Provided" scope' in the Run/Debug I get a error that I don’t understand. dataPipelineJobs. Shadow Version 5. 0-jar-with-dependcies. And sometimes it does not include . /gradlew clean bootRun and . After much research, I can't seem to get to the root of a problem I am having in generating a runnable Scala jar file using Gradle. That's why the directory keeps to be empty and your jar doesn't contain the compiled classes. home. Wiki on github contains all the information about how to use it in your project. membrane. kt with package test): jar { manifest { attributes 'Main-Class': 'test. Gradle building Spring Boot library without Main Class. class if you have multiple tasks in a single gradle. A class’s dependencies are determined from type references in its bytecode or symbol analysis via a compiler plugin. jar Manifest-Version: 1. My purpose is that this project is a library that will be pulled in by other projects therefore the library project does not require a main class to run. MF. jar javax. johnrengelman. Browse. gradle/cache (as in, the user's home cache), something I've never done before -- although perhaps I should do, Thanks guys, I was migrating an existing project to Gradle and didn't like the idea of changing the project structure that much. DemoApplication Looks like gradle has evolved. jar { manifest { attributes 'Main-Class': 'org. I have the desired classes to be included in a file say classes. jar | grep App com/my/company/App. gradle: springBoot { mainClass = "hello. gradlew jar The . Even when you run mvn exec:java the classpath is set to pick up the java source files in the current maven directory. apply plugin: 'java' apply plugin: 'eclipse' version = '0. Main' } The Main. Viewed 5k times 1 . demo. how to include only certain packages in jar during gradle build. java ├── lol. github. bla. Include specific classes in jar archive in gradle build. jar { manifest. If you modify I'm using gradle as the JavaFX plugin. Then, we’ll build and run the application. Q: What are the benefits of using Gradle to I create a jar file by Gradle(Ver 6. Problems finding main class with gradle jar file. named("bootJar") { mainClass = 'com. jar checked path to main class in manifest and in jar task in gradle; found out that compiled class is in specified jar in specified path; Made a jar task in gradle that looks like this: jar { manifest { attributes 'Main-Class': 'pl. Gradle build failed: Main class name has not been configured and it could not be resolved. When I am creating executable jar using I have a newbie question on a gradle java project. jar:build/libs/' + project. kt with package test):. I create a jar file by Gradle(Ver 6. I have been struggling to fix this issue. Note that this way the main class is named just MovieQuizBackend instead of MovieQuizBackendKt, so you will need to change it in build. I've updated my build. Why does gradle init generate unusable code? Relevant portion of gradle. classesDir in your jar task means that it will just copy everything from that directory in your jar. err] Error: Could not find or load main class Corporation I don’t use any class called Corporation. boot' version '2. 在 For those using Gradle (instead of Maven), referencing Spring Boot Gradle Plugin Reference Guide (as of Gradle 7. However, whenever I run it, regardless of what I use for a Main-Class attribute, the Could not find or load main class with gradle generated jar file. HelloWorld' } } //Alternatively you can run it Today I have just created a Java Library. In your build. I had to delete most of the contents of ~/. build: application { // Define the main class for the application. e. Just that may not be enough to build your kotlin jar. Improve this question. MF' } } You can even create a mixture of both: I'm having an issue where gradle fatJar/uberJar is causing the following exception when trying to run the jar: Error: Could not find or load main class com. 0 When looking at the file in the source, it has this content: Manifest-Version: 1. bounceme. 9' jar { manifest { attributes 'Main-Class': 'wd. The source code of the HelloWorld class looks as follows: package Can I build jar with multiple main classes (under same package) so that I can run the jar using the below command ? java -cp myjar. srcDirs classifier = 'sources' } artifacts { archives sourcesJar } I would like the output jar file to include both . build. Share. class files. java -jar ZoneNewsDiscordBot-1. Yet this needs to be mainClassName and if mainClass is used, it fails. class file; it’s a class with Version information that is created by other Gradle tasks (one task to replace a String in the file, another to compile it). I've received an error: no main manifest attribute, in temperaturetracker-0. jar Error: Could not find or load main class mypackage. In your case this would be When I run . MainRunner. $ jar tf com. Modified 10 years, 5 months ago. In each JAR file, the manifest will be a file with the following path / name inside the JAR - META-INF/MANIFEST. Let’s discuss the other possibilities. Viewed 2k times 1 At work we use gradle on a Scalding project and I'm trying to come up with the simplest job to get the hand out of the stack. Error: Could not find or load main class Main Caused by: java. kts files @ludoch 👋 If I understand correctly, what you are saying is that if we start adding the Main-Class entry in the manifest, while it marks the JAR as executable, it is not enough since we would be missing the classpath anyway. output } I then This works, but I see now why I didn't hit upon it before: Once that has worked, if I change the exclude it's ignored in favour of the previous version, even using . groovy file is simple: package vh class Main { static void main( String[] args ) { println 'Hello, World!' } } After plugging in the string values, the command line is: java -cp libs/groovy-all-2. I’ve defined the following task for jar’ing the test classes: task testJar(type: Jar, dependsOn: testClasses) { archiveClassifier 'tests' from sourceSets. However, I can’t get the jar task to exclude the original class file. Could not find or load main class, after build by gradle. RSA SIGNINGGC. EXCLUDE archiveBaseName = 'jar-1' from sourceSets. main: java -cp bootApp. Hello Caused by: java. 10. 7. For my project I put all dependent jar files in the folder with my project jar and add their names to the Class-Path attribute in the manifest. I had two issues: With Gradle 1. runtimeClasspath. 2 to 6. The advantage of this solution is that we make a proper Gradle multi module project with correct dependencies, not just tasks for building jars. jar on the I wrote my own application plugin that adds the Class-Path attribute to the manifest as well, so that java -jar myjar. Hot Network Questions How to Modify 7447 IC Output to Improve 6 and 9 Display on a 7-Segment I have jar built with gradle that errors out whenever I try to run it. /gradlew jar, the build succeeds, but it cannot find the main class when I try to run it: $ . My class looks as : We created jar file with all dependencies using build. Add apply plugin: 'application' to your build. jar jar { manifest { attributes 'Main-Class': 'com. RELEASE' } My library without the main class. class files under appropriate directory (e. I have even used the same exact line across other projects that have compiled and ran successfully. From inside the new project directory, run the init task using the following command in a terminal: gradle init. Change your build gradle like this. 0 Main-Class: test. build. java. Hello $ jar xf Gradle Output Jar has no Main-Class. jar vh. gradle apply plugin: 'java' manifest. jar MANIFEST. App' } } I have no idea what i can do more about it. application. name} please don't run your jar file in the lib directly Hey everyone. Here is my build. ApplicationKt' } from { configurations. nlp. After building the jar file, when trying to run it with. out. This happens when you apply the Application plugin and you have a java 9 module. Check the console for more information". Now I want to add the option to start a different main class in the same project. When creating a jar from my Kotlin code and running it, it says "No main manifest attribute". Application" } both . Gradle and Spring-bootRun can not find my class . I’m getting a little trouble when I want to run my application, once I have created my Jar, The error that I’m getting is like I have written above in The problem is the classpath. /gradlew jar BUILD SUCCESSFUL in 1s 2 actionable tasks: 2 executed $ java -jar build/libs/myapp-0. mf, it has this content: Manifest-Version: 1. We will also use Kotlin Gradle DSL in our build file instead of Groovy. 0. withType<Jar> { manifest { attributes["Main-Class"] = "com. attributes["Main-Class"] = "com. Your main works, if you: a) Remove the import I've seen this classpath config across various Gradle posts regarding compiling fat jars. For the other questions, press enter to use the default values. Could not find or load main class com. It successfully gets created, with all dependencies and . Error: Could not find or load main class in Jar. Launch class under com. main At the very least, the class path will need to contain the Scala and Scalding Jar(s). 7. Main" } } I'm very new to Gradle and the main reason I use it because I need to resolve dependencies issues for my compiled jar. Gradle builds a jar without classes. Add a comment I'm using the latest version of Gradle (milestone 9), and I'm trying to figure out how to create a Jar of all test binaries. Below, we’ll go through the steps we’ll need to follow for most of the applications we’ve created in this course. ClassNotFoundException: Main And if you want to make jar executable, you need also add Main-class to manifest (below example for main method in file Applicaion. I have tried implementing kotlin std lib, tried applying idea and application plugins but still nothing worked for me. EncryptPassword’ classpath = sourceSets. 3. To pr Could not find or load main class with gradle generated jar file. Thanks, this was what I needed. To add arguments to your main class modify the run task and edit the args property. If you look inside the META-INF/MANIFEST. class file to Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog Manifest-Version: 1. Hi guys. isDirectory() ? it : zipTree(it) } } } That first line of code basically states to "jar up" all the configured dependencies under the "compile" dependency configuration. 035 secs Here’s how you can generate an appropriate manifest file in the jar task of your build: jar { manifest { attributes 'Main-Class': application. g. I opened the jar with Unarchiver and the attribute was missing the manifest of the jar. How to get gradle to detect my test classes. loader. jetbrains. I'm trying to build a jar from a kotlin app using intelliJ idea, everything works from intellij, it's able to run kotlin files with the main method, however after building the jar with gradle jar I get: The process can be started in debug mode (see getDebug) in an ad-hoc manner by supplying the `--debug-jvm` switch when invoking the build. I'm overriding the 'jar' Gradle task to create a jar file (dependencies included) that executes starting from my main class file. This guide will show you how to create a Gradle build file, add dependencies to your project, and build a We’ll explain the steps of manually creating a project structure, performing the initial configuration, and adding the Java plug-in and JUnit dependency. I try to build a jar with Intellij Idea with Kotlin Gradle project. How to make . 找到jar包（idea一般在build目录下）2. jar got this in terminal. output } You can gradle gen builds genJar. bin/${rootProject. HelloWorld' //To create a runnable jar in GradleJavaProject\build\libs then java -jar GradleJavaProject. ClassNotFoundException: mypackage. I verified that the . This works no matter if the other class is defined in the same project, another project or even an external library. I’m using Gradle 7. jar from . Asking for help, clarification, or responding to other answers. Gradle - Could not find load main class. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Several Android apps in the same Gradle project. What do i wrong, is main = ‘it. 0 A compileJava task that compiles all the Java source files under src/main/java. properties └── lol. jar { manifest { attributes 'Main-Class': 'test. I searched a bit and found, that my Manifest is not exported correctly. mail-1. 0-SNAPSHOT. Gradle Application Plugin - Building multiple start scripts / dists for the same project with different mainClassName. Created jar file contains only META-INF directory. I added a few Kotlin and java classes in "main", and a single java class in "test". How do I use gradle application plugin to run a project with multiple packages? 11. 1. App However, when I look at the jar contents the class is clearly there. attributes["Class To build a jar with all the classes from main, as a default jar task would, do this: task gen2(type: Jar){ baseName = 'gen2Jar' from sourceSets. jar and gradle gen2 builds gen2Jar. mf file, you can see it's set to:. Otherwise any analyze based on simplified example will be analyze based only on your assumptions (which may not be correct since you are Note that the classname generated by Kotlin for a top-level function such as main is the package defined in the same file, plus the filename with KT appended. domhauton. gradle java source classpath. Build jar for each main class using gradle. 23. Everything works perfectly even after building and runnig the excecutable at distribution/, except with one class: CloseableHttpClient. jar contains a META-INF/MANIFEST. In this case, you make in your manifest an attribute, which point to this class, then a jar is running. springframework. 用解压工具打开jar文件4. classes } However I am getting a - Hi gradle team, I have a standalone project that does not contain any main method in any class. isDirectory() ? it : zipTree(it)} } } I didn't change anything from the file. fabipfolix. app-1. jar just works. 5, the manifest tag was not recognised inside the fatJar task, so the Main-Class attribute could not directly be set We can also specify a main class via the command line interface. Change the classpath for your java source and the class path will I have created a very basic gradle java project that prints "Hello Word". The JAR file will be created in the `build/libs` directory. The console then says "no main manifest attribute". shadow' version '2. I wish to configure the output artifact jar of this to only include certain classes from my project. 10. Error: Could not find or load main class Main My project file's hierarchy Update your build. ) I’m able to not only get it working in Eclipse (i. jar My project is more complex than "Hello World", the problem I am trying to solve is that my jar has only MANIFEST file . It sounds like you're asking how to build a "fat jar" in Gradle. You must ensure that you add the location of your . lib. MainClass' ) } } And then just change 'package. I unzipped my jar and checked that the main-class is there with the right name. whatever. jar with a different . Class-Path: commons-email-1. ShadowJar produces a Jar with an incorrect Main-Class entry in the manifest file. Hot the gradle 'application' plugin will output the zip file in build/distributions, so you can extract into a folder, it have bin/, lib/. 用记事本打开MANIFEST. Gradle built jar does not find my main class. apply plugin: 'application' mainClassName = 'test. jar, all of which contain all the classes from java. run { args += 'first_arg' } 33416293 git:(master) tree . 0. Hello" } from { configurations. Seems something has changed with Gradle 7+. 0 Gradle Version 5. I just a had more than one class with a main function and I needed a jar per one of those. tasks. gradle and set mainClassName = com. The META-INF folder in your generated Jar has these 2 files - SIGNINGGC. jar' There is a shadow plugin for gradle that can do the same thing. Build Jar File with multiple classes. This will allows you to run java -jar your-jar. 3 to 2019. 3. ApplicationKt' } } And with this you may run jar with command: java -jar <your jar> Below I have include simple example. E. client. 1-SNAPSHOT-plain. jar should have a Main-Class manifest entry helloworld-0. I'm trying to build a library. This works well. gradle. While it is nice to reduce example to minimum, it is important to make that minimal example able to reproduce the problem. . SF I assume that you are not signing the Jar. Import Jar and Use Class. The main class builds and runs fine. There’s a bug in my build. class,只需要加 t）7. 进到META-INF文件中5. FileImport', 'Implementation-Title': 'WD\ NLP', 'Implementation-Version': version } } repositories { main = ‘it. gradle file, you can apply application plugin first,. Main class could not be found when there is typo or wrong syntax in the fully qualified java class name or it does not exist in the provided classpath. class files in Jar which results in could not found or load class I didn't change anything from the file. And since the JPMS support takes care of adding the main class to the module-info, the modular part is covered After much research, I can't seem to get to the root of a problem I am having in generating a runnable Scala jar file using Gradle. gradle └── src └── main └── java └── lol ├── Lol. jar file. The exported manifest contains:. [ERROR] [system. Could not find or load main class with gradle generated jar file. attributes["Main-Class"] = "<your-main-class-full-path>" } Faced a problem while building java app using Gradle. PokerHandScorer' ) } } Where 'pokerhandscorer' is the name of the package name, and PokerHandScorer is the main class name; This creates a jar file into your The configured main class is also baked into the module-info. You can do this with the JAR task like so: jar { from {configurations. main. My requirement is to add Core to I am migrating from goovy to Kotlin script and from 4. 以下のgradleコマンドを実行すれば、プロジェクトのbuildディレクトリ配下にjarファイルが作成される Expected Behavior Running gradle assemble in Micronaut project produces 2 jars (helloworld-0. Main The simple jar main/java is a part of package name / project dir structure. @sylhare mvp 👑, works great for the new gradle build. Hot Network Questions How to Modify 7447 IC Output to Improve 6 and 9 Display on a 7-Segment Movie about dirty federal agents How to Achieve the gradle 'application' plugin will output the zip file in build/distributions, so you can extract into a folder, it have bin/, lib/. 1, a gradle. Note that the first 3 methods modify the existing Jar task of Gradle. class file in a . 2' And if you want to make jar executable, you need also add Main-class to manifest (below example for main method in file Applicaion. But in either case, you should be collecting the runtime Some time ago I created a gradle-based project in IntelliJ to play around. 在 Gradle 中，您可以通过配置 jar 任务来完成。. I want to publish two separate artifacts to maven, one for the utility API and one for the unit test utility API. gradle ├── build. MF6. cmhteixeira cmhteixeira. The easiest is probably to use application plugin. If you do a gradle shadowJar on Core, you will get a 35 MB Jar. Main Main. TheKotlinClass. mainClassName } } Alternatively, you can use a custom file for the manifest: jar { manifest { from 'MANIFEST. non-executable) one, and has no options to choose other project forms. Can't find Main when executing a Java class from Gradle. How to create . Instead it generates a distribution with Windows and *nix start scripts where the main class is used and all libaries put to the class path. (For some odd reason, when you use Eclipse to create Gradle project, it creates a library (i. sam. schedulein. If you do a gradle build on Core, you will get a 200 KB jar. gradle └── partition-by-users // sub-project ├── com. I have figured it out, thought this information could be useful to beginners. 1. 1 Expected Behavior I applied the We created jar file with all dependencies using build. collect { it. I have to create a executable jar file to run this project and use it for my task. botwave. build file is built that has a mainClass variable. Add the following configuration to the jar task: jar {manifest {attributes ('Main-Class': To make the jar file executable (so that the java -jar command works), specify the Main-Class attribute in MANIFEST. MF, it contains 2 lines attributes ‘Main-Class’: ‘com. java files, but it only includes . 5. Simple Fix. lang. jar When java runs, it has no idea where any of these things are, it also requires the groovy runtime in order to understand your groovy code. gradle file. I'm using IntelliJ with Spring and my main class is wrapped in a JAR. When i try to run java -jar out\\artifacts\\helloWorld_jar\\helloWorld. Ask Question Asked 10 years, 5 months ago. /gradlew clean build with java -jar I'm using the latest version of Gradle (milestone 9), and I'm trying to figure out how to create a Jar of all test binaries. test. 6 and am trying to replace a . However I want it to be a normal library, without any Main classes. Main. Hot Network Questions Elegant way to maximizing linear function subject to being on the surface of a sphere referencing sourceSets. gradle To set your main class on the Manifest using gradle: jar { manifest. Works fine when launching with gradle, but you need to configure sources to run as an application – alan ocallaghan. The manifest inside the jar is correct and Main. Hot Network Questions Correctly sum pixel values into bins of angle relative to center The java plugin only adds a jar task for the main source set. you can run your program just like . class also there. If you run the modular application directly using the java command, it is then sufficient to provide To make the generated JAR file executable, you need to specify the main class in the build. ezbj yfdh ebf ecini hbrlq thvhlm nsigsn jbbwqt pnf pmkk

Gradle jar main class. jar and gradle gen2 builds gen2Jar.