Able to run java program from IntelliJ but not from command line

Question

I am working on a project. I am able to run the program from within IntelliJ but when I try to run it using

java -cp <my jar> <Main class>

I get a java.lang.NoClassDefFoundError

Exception in thread "main" java.lang.NoClassDefFoundError: org/nocrala/tools/gis/data/esri/shapefile/ValidationPreferences
    at Converter2.parse(Converter2.java:26)
    at Main.main(Main.java:19)
Caused by: java.lang.ClassNotFoundException: org.nocrala.tools.gis.data.esri.shapefile.ValidationPreferences
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)

How can I fix this?

I guess because of intelleJ serve root to compiled class and does not have problem finding packages, files or class. Can you take snap shot of your project from intelleJ and post it in your question, it might give help figure out answering you correctly — Maytham Fahmi, Sep 12 '15 at 00:53

score 0 · Answer 1 · answered Sep 12 '15 at 00:42

0

May I ask what is your exact <Main class>? Also how did you pack the jar? Maybe you didn't include all the dependency jar libraries? (maybe in this case nocrala)?

It looks like Main.main() is already executing.

answered Sep 12 '15 at 00:42

Yibin Lin

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1
6
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Main.main() is my main class and you can see that is was executing. I have tried packing the jar using both intellij and mvn package. Neither complains. i have included all the dependencies otherwise mvn package would have failed with an error. – morpheus Sep 12 '15 at 00:46

score 0 · Accepted Answer · edited May 23 '17 at 11:51

I did a jar xf on my jar file and it only showed me .classes for the .java files that I had written. That gave me a hint. Basically mvn package did not package the dependencies into the jar file. I searched a bit and found this link on how to package dependencies into jar. I edited my pom.xml and pasted following code in it (directly taken from the aforementioned link)

<build>
    <plugins>
      <!-- any other plugins -->
      <plugin>
        <artifactId>maven-assembly-plugin</artifactId>
        <executions>
          <execution>
            <phase>package</phase>
            <goals>
              <goal>single</goal>
            </goals>
          </execution>
        </executions>
        <configuration>
          <descriptorRefs>
            <descriptorRef>jar-with-dependencies</descriptorRef>
          </descriptorRefs>
        </configuration>
      </plugin>
    </plugins>
  </build>

now when I ran mvn package it generated a foo-jar-with-dependencies.jar and I was able to execute it successfully from the command line using java -cp .... I also did jar xf on it and verified it now contained all my dependencies. The difference in file size was also enormous as I was pulling in lot of third party packages in my project.

Able to run java program from IntelliJ but not from command line

2 Answers2