running a java project from command line using classpath issue?

Question

I am trying to run a java project from the command line in linux, my project uses two external jar files. The command that i am givin is

java -classpath -jar bin:common-cli-1.2.jar:BuildFrameworkLibrary.jar com.kpit.goa.common.tools.kivibuild.KIVIBuild

where KIVIBuild is the class that contains the main function. But the error that am getting is:

baibhav@baibhav:~/git/KiviBuild/Infra/RepoManagement/BuildManagement/KIVIBuild$ java -classpath bin:common-cli-1.2.jar:BuildFrameworkLibrary.jar com.kpit.goa.common.tools.kivibuild.KIVIBuild

Gives

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/cli/ParseException
Caused by: java.lang.ClassNotFoundException: org.apache.commons.cli.ParseException
    at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
Could not find the main class: com.kpit.goa.common.tools.kivibuild.KIVIBuild. Program will exit.

java -classpath ".:bin/common-cli-1.2.jar:bin/BuildFrameworkLibrary.jar" com.kpit.goa.common.tools.kivibuild.KIVIBuild — Khinsu
– Khinsu, Commented Aug 19, 2013 at 15:12

Brian Agnew · Accepted Answer · 2013-08-19 15:36:58Z

3

You need a path separator e.g.

 bin/common-cli-1.2.jar:BuildFrameworkLibrary.jar

The colon separates paths to individual jar files. e.g. in the above you're referencing the two files

bin/common-cli-1.2.jar
BuildFrameworkLibrary.jar

and also reference the directory containing your compiled classes e.g. if they're in (say) target/classes then use:

target/classes:bin/common-cli-1.2.jar:BuildFrameworkLibrary.jar

(relative to your current working directory)

edited Aug 19, 2013 at 15:36

answered Aug 19, 2013 at 14:38

Brian Agnew

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2 Comments

baibhavk Over a year ago

if i use path separator i.e java -classpath bin/common-cli-1.2.jar:BuildFrameworkLibrary.jar... or "." i.e java -classpath .:common-cli-1.2.jar:BuildFrameworkLibrary.jar.., then i get the error of : Exception in thread "main" java.lang.NoClassDefFoundError: com/kpit/goa/common/tools/kivibuild/KIVIBuild Caused by: java.lang.ClassNotFoundException: com.kpit.goa.common.tools.kivibuild.KIVIBuild. Program will exit. I used bin: as in linux classpath --help suggested this way to include the jar files. Jar files are present in the rootpath of the project.

baibhavk Over a year ago

Error is : Could not find the main class: com.kpit.goa.common.tools.kivibuild.KIVIBuild. Program will exit.

CSchulz · Accepted Answer · 2013-08-19 15:21:41Z

1

Use following command

javac -classpath bin/common-cli-1.2.jar:bin/BuildFrameworkLibrary.jar KIVIBuild.java -d .

Do not forget to add dot at the end of command

check is /com/kpit/goa/common/tools/kivibuild/KIVIBuild.class exist or not if yes run the following command

java -classpath bin/common-cli-1.2.jar:bin/BuildFrameworkLibrary.jar com/kpit/goa/common/tools/kivibuild/KIVIBuild

http://www.linuxheadquarters.com/howto/classpath.shtml

Rather than setting class path every time set it onces in existing classpath variable and just run the java command

edited Aug 19, 2013 at 15:21

CSchulz

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answered Aug 19, 2013 at 14:42

Rakesh Soni

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1 Comment

baibhavk Over a year ago

I am still getting the error Could not find the main class: com/kpit/goa/common/tools/kivibuild/KIVIBuild. Program will exit. although KIVIBuild.class is present in the respective folder

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