Error: Could not find or load main class Main - when running from Linux command line

Question

Originally, I was able to run my code from command line as such:

java -cp "/var/www/html/tcqa/bin/test_and_control-1.0-SNAPSHOT.jar:/var/www/html/tcqa/bin/postgresql-9.3-1100-jdbc41.jar" Main /var/www/html/tcqa/sql/tc.sql

I needed to add some new functionality and decided to break out the main class and use case to manage which sql statement would get run. I moved my main class out and have not been able to get my code to run from command line. My new command line looks like this:

java -cp ["/home2/smontoya/test_and_control-1.0-SNAPSHOT.jar:/var/www/html/tcqa/bin/postgresql-9.3-1100-jdbc41.jar;"] Main email /var/www/html/tcqa/sql/email.sql

Obviously I want to test this before moving it into production mode. My code structure looks like this:

main
|-->java
    |--> email
    |    |__ EmailFlag
    |    |__ EmailRow
    |--> tc
    |    |__  Analytics
    |    |__ Row
    |    |__  TestAndControl
    |    |__  Utils
    |--> Main

I found the solution. The problem is that the two jar files were NOT in the same location. One was located in my bin directory and another was in another completely different location (directory structure). After the two jar files were in the same directory the main error went away... — smontoya
– smontoya, Commented Dec 8, 2014 at 14:22

Abhinav Yalamanchili · Accepted Answer · 2014-12-03 16:52:16Z

1

Please check your manifest file in the jar.. It describes the version and mainClass. If you are using maven .. While adding dependencies to build jar describe the main class in configuration so that maven will add this configuration to manifest file

answered Dec 3, 2014 at 16:52

Abhinav Yalamanchili

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2 Comments

Abhinav Yalamanchili Over a year ago

Also as mentioned by stackdev u can give main class namw with package as classpath

smontoya Over a year ago

The problem turned out to be that the two files were not in the same directory location. After I placed the two files in the same directory location everything worked fine.

outdev · Accepted Answer · 2014-12-03 16:58:45Z

0

Try specifying fully qualified name of the Main:

java -cp /path1:/path2 com.company.Main arg1 arg2

answered Dec 3, 2014 at 16:58

outdev

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