Unable to execute java class from command line

Question

I compiled a java project and generated .class files. If I try to run my code like below (refer https://stackoverflow.com/a/12044735/147530):

java com.mycompany.mysubdomain.App

I get this error:

java.lang.ClassNotFoundException: com.mysql.jdbc.Driver

understandable as I haven't specified the classpath where com.mysql.jdbc.Driver can be found. So I ran:

mvn dependency:build-classpath

to get classpaths of my dependencies. Then I have tried running like so:

java -classpath /Users/me/.m2/repository/mysql/mysql-connector-java/5.1.6/mysql-connector-java-5.1.6.jar:/Users/me/.m2/repository/com/vividsolutions/jts/1.13/jts-1.13.jar:/Users/me/.m2/repository/junit/junit/4.11/junit-4.11.jar:/Users/me/.m2/repository/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3.jar com.mycompany.mysubdomain.App

but now I get this:

Error: Could not find or load main class com.mycompany.mysubdomain.App

I don't understand why its complaining now. Note the crucial thing - when I omitted the classpath it was able to find App. The ClassNotFoundException happened because it couldn't find a dependency. But now why is it complaining that it can't find the App to begin with? How can I fix this?

Don't you think you should also provide the current directory (there your class is located) as part of the classpath? — Tom
– Tom, Commented Oct 31, 2015 at 21:26

JB Nizet · Accepted Answer · 2015-10-31 21:26:02Z

4

By adding the directory where your own package tree resides to the classpath:

java -cp .:/Users/me/.m2/repository/mysql/mysql-connector-java/5.1.6/mysql-connector-java-5.1.6.jar:/Users/me/.m2/repository/com/vividsolutions/jts/1.13/jts-1.13.jar:/Users/me/.m2/repository/junit/junit/4.11/junit-4.11.jar:/Users/me/.m2/repository/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3.jar com.mycompany.mysubdomain.App

answered Oct 31, 2015 at 21:26

JB Nizet

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