run jar file from command line with main class

jar cfe myJavaJar.jar com.mycomp.myproj.dir2.MainClass2 com/mycomp/myproj/dir2/MainClass2.class /home/myhome/datasource.properties /home/myhome/input.txt, com/mycomp/myproj/dir2/MainClass2.class : no such file or directory. You can get help by . What is the best way to show results of a multiple-choice quiz where multiple options may be right? Hope this helps you. The Documentation gives the following example: There are two types of JAR files available in Java: Runnable/Executable jar file which contains manifest file. If the class is not in a package then simply java -cp myJavaJar.jar myJavaClass. To learn more, see our tips on writing great answers. Displays the command-line help for the jar command or optionally the compatibility help. Does activating the pump in a vacuum chamber produce movement of the air inside? Does squeezing out liquid from shredded potatoes significantly reduce cook time? How to help a successful high schooler who is failing in college? Why does it matter that a group of January 6 rioters went to Olive Garden for dinner after the riot? 2022 Moderator Election Q&A Question Collection, Creating a jar file from Scala project without using Sbt or Maven, How omit the package when running the java class (with jar), How to run a java code inside a jar file that reads a file specified in String args[]. What is a good way to make an abstract board game truly alien? What exactly makes a black hole STAY a black hole? Run jar with dependencies from the command line 14,299 Solution 1 When you use java -jar, dependencies are not specified on the command line. Find centralized, trusted content and collaborate around the technologies you use most. This was when I was trying to launch a very simply scala program: With an incorrect version, I was getting a cryptic message, the same the OP did. Do i need to add file:/// for all the class path I add, Could not find or load main class with a Jar File, docs.oracle.com/javase/tutorial/deployment/jar/view.html, Making location easier for developers with new data primitives, Stop requiring only one assertion per unit test: Multiple assertions are fine, Mobile app infrastructure being decommissioned. What do you mean when you say that you want 'to use' that class? And I have another Java class given below. Should we burninate the [variations] tag? Stack Overflow for Teams is moving to its own domain! For example: java SecondLevelJsonCreator 3 "C:/path/filename.xls". When the migration is complete, you will access your Teams at stackoverflowteams.com, and they will no longer appear in the left sidebar on stackoverflow.com. How do I simplify/combine these two methods? So I have a java app jar that has the H2 dependency, I need to access a class with a main method that is provided by this H2 dependency from the command line. I didn't mean to call you out or anything like that. How do I start multiple main programs in a Java executable .jar? Multiplication table with plenty of comments. You need to be storing TestClass.class - some people new at this store the source file, TestClass.java. type your own artifactId, version and package and java main file. Each JAR file have a manifest file by default. Write a Main class in which the main method calls the actual method depending on the command line argument passed. mvn package. If a creature would die from an equipment unattaching, does that creature die with the effects of the equipment? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. But now I need to make both the classes one jar and I need to run these two classes from the jar. Can I spend multiple charges of my Blood Fury Tattoo at once? Find centralized, trusted content and collaborate around the technologies you use most. I had the same problem due to copying and pasting code from a Microsoft Word Document. I've been through everything I've been able to find with this problem, and none of it seems to help. Not found any post match with your request, STEP 2: Click the link on your social network, Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy, Working with JAR and Manifest files In Java, Java 8 Examples Programs Before and After Lambda, Java 8 Lambda Expressions (Complete Guide), Java 8 Lambda Expressions Rules and Examples, Java 8 Accessing Variables from Lambda Expressions, Java 8 Default and Static Methods In Interfaces, interrupt() VS interrupted() VS isInterrupted(), Create Thread Without Implementing Runnable, Create Thread Without Extending Thread Class, Matrix Multiplication With Thread (Efficient Way). Once you are sure that Java is installed in your machine, path and classpath are proper, just execute the following command and it will run your Java program from the JAR file itself: $ java -jar Hello.jar How do I make kelp elevator without drowning? What is the deepest Stockfish evaluation of the standard initial position that has ever been done? Stack Overflow for Teams is moving to its own domain! Put them in a package, make sure the directory tree matches the package tree, and use the fully qualified name of the class: Regex: Delete all lines before STRING, except one particular line. Not the answer you're looking for? Now, we'll run our application from the command line using the java command: java -jar greet.jar john "Sunny Beach" Here, the -jar flag specifies that the application is in JAR format. my ant jar task had a prefix of "/" but needed "". The above works, but what I want is: Can't execute jar- file: "no main manifest attribute", Can't start Eclipse - Java was started but returned exit code=13. Have a class that acts as a controller. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. com/mycomp/myproj/dir3/MainClass3.class What is the best way to sponsor the creation of new hyphenation patterns for languages without them? If you have your setup with Maven project -- make sure that the following match your JDK in the pom.xml file. Instead it requires a complete folder hierarchy. com/mycomp/myproj/dir2/MainClass2.class More details regarding how to run a jar file can be found in our article Run JAR Application With Command Line Arguments. Is cycling an aerobic or anaerobic exercise? Create an archive, classes.jar, that contains two class files, Foo.class and Bar.class. tcolorbox newtcblisting "! Everything was useless except your answer. The two most likely-looking things at this point are that either the file in the jar is not stored in a directory WITHIN THE JAR, or that it is not the correct file. a. move the class to sources directory (prefered), b. make sure "include tests" checkbox is selected when creating an artifact. Try running the same TestClass via command line instead of Eclipse. (In the above command, '/home/myhome/datasource.properties' and '/home/myhome/input.txt' are the command line arguments). This os the only answer that helped me! 3 Answers. Not able to run test.xml file through maven and command line in java selenium; If I run a plugin from the command line at the root pom, what does it do when traversing modules? The -jar flag tells the launcher that the application is packaged in the JAR file format. Why is proving something is NP-complete useful, and where can I use it? Open a command prompt and cd into your project folder. Stack Overflow for Teams is moving to its own domain! Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Solution. Here are also 2 directories for the same reasons. If success then move ahead. Making statements based on opinion; back them up with references or personal experience. In its main(), invoke other classes based on arguments passed. I can run this file by passing the arguments from command prompt by using the .class files of this. In the Jar directory, I can clearly see a classes\TestClass file when I extract it. Is there a trick for softening butter quickly? Before we can run this, you need to have access to the Fernflower JAR file. I thought it would be to go into the directory and say java -cp myJar.jar.myClass but that isn't working. Using Java's Windows Explorer is a viable option. Does the Fog Cloud spell work in conjunction with the Blind Fighting fighting style the way I think it does? This error comes even if you miss "-" by mistake before the word jar. Find centralized, trusted content and collaborate around the technologies you use most. Share. MATLAB command "fourier"only applicable for continous time signals or is it also applicable for discrete time signals? 2022 Moderator Election Q&A Question Collection. Should we burninate the [variations] tag? 4.3. Add this Main class in the manifest. you can retrieve them like this: String arg1 = args[0]; String arg2 = args[1]; Share: 147,786 Employer made me redundant, then retracted the notice after realising that I'm about to start on a new project. Connect and share knowledge within a single location that is structured and easy to search. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. java -jar HelloWorld.jar The output of the command is shown below. Use javac on the command line to produce TestClass.class. is the TestClass in the package classes? For example, this line prints assembly code for the toString() method of the String class: print java/lang/String toString. class which you normally want to invoke when launching your Java application.. Error: Could not find or load main class com\json\FirstLevelJsonCreator I am getting this error when i run java -cp com.json-0.0.1-SNAPSHOT.jar com/json/FirstLevelJsonCreator can u tell me the answer for this. next step on music theory as a guitar player. What is a good way to make an abstract board game truly alien? I've gone through dozens of different threads and docs on this topic. Is there a main method that you want to call in particular? java -cp myJavaJar.jar com.mypackage.myJavaClass. THANK YOU. Launch Configuration identifies which program should be exported. This is very difficult to debug without complete information. In C, why limit || and && to evaluate to booleans? What are the differences between a HashMap and a Hashtable in Java? And he asked the question that would be answered by what you pointed out and I repeated. This did not help me. It will be certainly Yes if your program was Compiled successfully. Failing to run jar file from command line: "no main manifest attribute", Spring Boot jar launch error: Exception in thread "main" java.lang.NoClassDefFoundError, Spring Boot with Docker and Maven . Here, is what a default manifest file looks like. Is there a way to make trades similar/identical to a university endowment manager to copy them? If you try to run this jar with java -jar App.jar, it will complain that it cannot find the App class. We then specify the JAR file and pass the program arguments for Greeting. Target folder with classes, test classes, jar file and other resources folder and files will be created. I am having this classes in one package so how i can i do this. Does the 0m elevation height of a Digital Elevation Model (Copernicus DEM) correspond to mean sea level? Assuming you are in the directory where myJar.jar file is and that myClass has a public static void main () method on it: You use the following command line: java -cp ./myJar.jar myClass Where: myJar.jar is in the current path, note that . If you are not within the directory where myJavaJar.jar is located, then you can do: java -cp /location_of_jar/myJavaJar.jar com.mypackage.myJavaClass, java -cp c:\location_of_jar\myJavaJar.jar com.mypackage.myJavaClass. These code snippets will help you about run a .jar file from command prompt. isn't in the current path on most systems. True, it happens for me most of the time on copying from outlook or Skype.. omg that's what happened to me! But when i try to run it from the command prompt using java -jar JavaApplication3.jar i get the following errors: Exception in thread "main" java.lang.NoClassDefFoundE rror: com/sun/logging/ LogDomains at com.sun.appserv.security.P rogrammati cLogin.<cl init>(Prog rammatic Login.java:85) at demo.Main.main(Main.java:3 1) Caused by . If you do unzip -l /location-of-jar/myjar.jar, and see something other than com/mypackage/myClass, this is your problem. Make sure it is not "/classes". A fully qualified path is preferred here as well. Now we need to specify the name of the class that contains the main method. If you want to run/execute a main method from a jar file you created with Scala and the sbt package command, this tutorial shows how to do it. This will directly add all files in the target/classes directory to the root of App.jar, thus solving the problem. Just one thing you can try before replying. What I usually do is to get the jar of the H2 dependency and: java -cp h2.jar org.h2.tools.Shell. next step on music theory as a guitar player, What does puncturing in cryptography mean. How do I simplify/combine these two methods? [duplicate]. How do I call one constructor from another in Java? What does "Could not find or load main class" mean? You can run JAR packaged applications with the Java launcher ( java command). Is there an other way than going (cd) into the folder with the packages/classes? I was pulling my hair out trying to solve this problem until I read it, and now my jar runs perfectly. The following command creates an executable jar file with the main class is net.codejava.swing.mail.SwingEmailSender: jar cfe SwingEmailSender.jar net.codejava.swing.mail.SwingEmailSender -C build\classes . App. Asking for help, clarification, or responding to other answers.

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