java.lang.NoClassDefFoundError: org/apache/poi/ss/usermodel/Row

Question

I\'ve made a small application that reads from an excel (xls file) and displays the contents to a JTable. Everything is working fine in eclipse, yet when I create the jar file a

Answer 1

Probably you are getting this only when you are running your jar because the dependencies are not available/packaged inside of it.

Try generating a "fat jar" (also known as uber-jar), it will package all your dependencies inside the jar:

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-shade-plugin</artifactId>
            <executions>
                <execution>
                    <phase>package</phase>
                    <goals>
                        <goal>shade</goal>
                    </goals>
                </execution>
            </executions>
            <configuration>
                <finalName>YOUR_JAR_FINAL_NAME</finalName>
            </configuration>
        </plugin>
    </plugins>
</build>

Documentation related to the maven-shade-plugin can be found in here

UPDATE: Since you are using a runnable jar file, you can follow this section of the documentation related to Executable Jars