Netbeans java maven 项目成功构建，但无法运行

Question

When I clean & build, the project says "build success" and I can see the .jar file created in the target folder, but when I try to run or debug the main class netbeans says "Error: Could not find or load main class..."? I can run the .jar file from the command line.

Edit: this is a javaFx project.

Answer 1

It may be due to some reasons, you can try these:

1. Main Class is not declared as "PUBLIC".
2. Java Environment path should be set correctly .
3. Try to change the location of project.

Answer 2

I've partially solved the problem. It appears that netbeans has some issues with javaFX projects. I found several sites indicating problems.

I was able to get it working by creating a new Maven / JavaFX application, then I took the nbactions.xml file from that project and replaced the nbactions.xml in my project. After that, I can run the app by selecting the main project node and using the run/debug buttons on the toolbar. Right clicking the Main class and selecting run or debug still does not work. Thanks to @skomisa for reminding me there is more than one way to run a project!

Here's the nbactions.xml file that I copied that works:

<?xml version="1.0" encoding="UTF-8"?>
<actions>
  <action>
    <actionName>run</actionName>
    <goals>
      <goal>clean</goal>
      <goal>package</goal>
      <goal>org.codehaus.mojo:exec-maven-plugin:1.2.1:exec</goal>
    </goals>
    <properties>
      <runfx.args>-jar "${project.build.directory}/${project.build.finalName}.jar"</runfx.args>
    </properties>
  </action>
  <action>
    <actionName>debug</actionName>
    <goals>
      <goal>clean</goal>
      <goal>package</goal>
      <goal>org.codehaus.mojo:exec-maven-plugin:1.2.1:exec</goal>
    </goals>
    <properties>
      <runfx.args>-Xdebug -Xrunjdwp:transport=dt_socket,server=n,address=${jpda.address} -Dglass.disableGrab=true -jar "${project.build.directory}/${project.build.finalName}.jar"</runfx.args>
      <jpda.listen>true</jpda.listen>
    </properties>
  </action>        
</actions>

Here's an example of previous the nbactions.xml file that did not work. Notice the properties for the run and debug actions are quite a bit different.

<?xml version="1.0" encoding="UTF-8"?>
<actions>
  <action>
    <actionName>run</actionName>
    <packagings>
      <packaging>jar</packaging>
    </packagings>
    <goals>
      <goal>process-classes</goal>
      <goal>org.codehaus.mojo:exec-maven-plugin:1.2.1:exec</goal>
    </goals>
    <properties>
      <exec.args>-classpath %classpath com.edulog.athenaprobe.MainApp</exec.args>
      <exec.executable>java</exec.executable>
    </properties>
  </action>
  <action>
    <actionName>debug</actionName>
    <packagings>
      <packaging>jar</packaging>
    </packagings>
    <goals>
      <goal>process-classes</goal>
      <goal>org.codehaus.mojo:exec-maven-plugin:1.2.1:exec</goal>
    </goals>
    <properties>
      <exec.args>-Xdebug -Xrunjdwp:transport=dt_socket,server=n,address=${jpda.address} -classpath %classpath com.edulog.athenaprobe.MainApp</exec.args>
      <exec.executable>java</exec.executable>
      <jpda.listen>true</jpda.listen>
    </properties>
  </action>

</actions>