I noticed that Maven Source zip didn’t include any libraries at lib folder however Binary zip had them + in boot folder it had plexus-classworlds-2.4.jar. I finished my project and it worked fine. That is what I am trying to say here. The issue was on a project I knew worked in the past, but failed when I tried it on another pc. Prior to this phase, you should notice that any .java file you have with a main() method within it will show up in the 'Projects' pane with its icon looking like this (no arrow): After this scanning phase finishes, if a main() method was discovered within the file, that file's icon will change to this (with arrow): So on my system, it appeared this "Scanning projects..." step was failing, and instead would be stuck on an "Opening Projects" step. Here is some of the code with the main: I posted this before but had a couple issues. And run again. Why? Thanks for contributing an answer to Stack Overflow! I find this issue in my centOS is caused by “Oracle Java is replace by gcj”, after change default java to “Oracle Java”, the issue is resolved. For Maven you need JDK and NOT JRE. Finally I created a jar and war file and my web app ran successfully on my local Tomcat. I'm afraid I haven't used NetBeans much, so I can't help you with where that option is. mypackage.MyClass). java – Android HTML.fromHTML get output in one line – Stack Overflow, java – Decode Octet response from RestTemplate – Stack Overflow, java – How many results in these two programs and why? For the Fey Touched and Shadow Touched feats, what exactly does "spell slots [...] of the appropriate level" mean? Look for Main Class. Besides what @khmarbaise has pointed out, I think you have mistyped your JAVA_HOME. February 20, 2020 Java Leave a comment. Then add the bin directory of the created directory apache-maven-3.5.0 to the PATH environment variable. Questions: I am receiving ByteArrayResource as response from my RestTemplate response. In project properties, under the run tab, specify your main class. Anyway it helped me so my M2_HOME is: C:\Program Files\Java\apache-maven-3.0.5 and at PATH I put: C:\Program Files\Java\apache-maven-3.0.5\bin. At the end, you can easily test, which environment variable gone bad, and you can very easily fix your script (or set it what is needed). But the output comes in 2 lines. If you just want to run the file, right click on the class from the package explorer, and click Run File, or (Alt + R, F), or (Shift + F6). Your email address will not be published. your coworkers to find and share information. What could be the problem? I had the same problem today. : If, on the other hand, you just forgot to copy the closing braces in your code, or the above suggestion doesn't work: open up the configuration and see if you can manually set the main class. After a series of trial and error attempts I finally resolved it. On linux, you can debug shellscripts giving the -x flag to your shell interpreter (which is most probably bash). and when I tried to echo M2_HOME from the terminal, it showed me the correct path but when I tried to fire any maven command like mvn clean or mvn install, it always gave the same problem, Could not find or load main class org.codehaus.plexus.classworlds.launcher.Launcher, I solved this issue by changing my M2_HOME to this, And voila ! The link provided here offered the solution in a comment by McKamey – simply delete M2_HOME (unset M2_HOME). I have had quite a share of people downloading the wrong file, seniors and juniors. It will open project properties.In the categories select RUN. Questions: I am setting a textview as HTML retrieved from Firebase database. This can be confirmed by visiting the Maven install page: “Add the bin directory of the created directory apache-maven-3.3.9 to the PATH environment variable” — no mention of M2_HOME or M3_HOME at all. @assylias - I just hit the green play arrow. That means, it is not a standalone binary, it is a collection of java .jars, interpreted by a jvm (java.exe on windows, java on linux). : Had this issue on two different Ubuntu 12.04 installs, despite the installs being done by apt-get. At that point I knew that the path was correct because the path was displayed in the window. Solution − The extension .class is not required while executing the program. You need to rename your main class to Main, it cannot be anything else. Stack Overflow for Teams is a private, secure spot for you and This is a common issue while setting up Maven. Edit: See peeskillet's answer if adding closing braces doesn't work. Me too faced the similar issue. For example, package org.jis;, then add the main class to that. I am on a Mac running OSX 10.9 with JDK 1.7. Later I corrected those with correct path of folder apache-maven-3.3.3-bin. Specifying main class in properties should always work, but if in some rare case it doesn't work, then the issue could be resolved by re-creating the project and not forgetting to check "Create main class" if it is unchecked. This worked for me. (Note that the class containing the main method need not necessarily be named Main but the main method can have no other name.). I am on OS X ElCap, 10.11.6 and upgraded to Maven 3.3.9. Were English poets of the sixteenth century aware of the Great Vowel Shift? © 2014 - All Rights Reserved - Powered by, Maven error: Could not find or load main class org.codehaus.plexus.classworlds.launcher.Launcher. What I learnt is that upon starting NetBeans, it should perform a step called "Scanning projects...". Thank you though. Leave a comment. Note: Please delete M2_HOME, if already set. I copied the path that was assigned to my M2_HOME variable. The connections I made in preparing this for posting really cleared it up for me, once and for all. the IDE is not recognizing the Main class on 1st class entry. Posted by: admin After I change to Binary zip archive, everything go to be fine. this script sets the needed environment variables. – Stack Overflow. ... Resource from src/main/resources not found after building with maven. 使用maven打包时，提示maven打包时，提示main class not found，解决方法：pom.xml中增加如下配置： org.springframework.boot spring-boot-maven-plugin