java.lang.NoClassDefFoundError: org/apache/commons/cli/ParseException

Question

I want to add apache cli to my application, but I have problem. These errors show when I try to run it:

Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/cli/ParseException
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
    at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
    at java.lang.Class.getMethod0(Class.java:3018)
    at java.lang.Class.getMethod(Class.java:1784)
    at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544)
    at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.cli.ParseException
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 7 more

Here is my code:

CommandLineParser parser = new PosixParser();
Options options = new Options();
options.addOption("a", "abc", true, "First parameter");

try {
    CommandLine commandLine = parser.parse(options, args);
    System.out.println(commandLine.getOptionValue("a"));
} catch (ParseException e1) {
    e1.printStackTrace();
}

I also added in pom.xml this:

<dependency>
    <groupId>commons-cli</groupId>
    <artifactId>commons-cli</artifactId>
    <version>1.2</version>
</dependency>

But it doesn't help :/ Also I added manually firstly commons-cli-1.3.1.jar and later commons-cli-1.2.jar but both doesn't help.

@edit

Ps. I'm running it as "java -jar filename.jar".

Answer 1

With few minute changes I am able to execute this code:-

    CommandLineParser parser = new PosixParser();
    Options options = new Options();
    options.addOption("a", true, "First parameter"); 
    args=new String[]{"-a abc"};

    try {
        CommandLine commandLine = parser.parse(options, args );    
        System.out.println(commandLine.getOptionValue("a"));
    } catch (ParseException e1) {
        e1.printStackTrace();
    }


Output :-  abc

In my pom.xml :-

  <dependency>
    <groupId>commons-cli</groupId>
    <artifactId>commons-cli</artifactId>
    <version>1.2</version>
  </dependency>

commons-cli-1.2.jar is not visible to your code.

Answer 2

Try listing in the classpath all the jars that you are using:

java -classpath lib/*.jar:other/location/lib/*jar:. my.package.Program

You must tell java which libraries to use to run the code.