Trouble running java program

Question

I 'm trying to run a simple java program but I keep getting a NoClassDeffoundError. My directory structure is as follows;

/src/atlasAPI/AtlasService.java
/src/DatabaseClient.java

/lib/<some jar files>

/bin/DatabaseClientTest.class
/bin/AtlasService.class

The DatabaseClientTest class has the main method.

How do I run the program from the command line?

How are you running it now?

Rohit Jain
– Rohit Jain

2013-06-25 18:44:59 +00:00
Commented Jun 25, 2013 at 18:44 — Rohit Jain
– Rohit Jain, Commented Jun 25, 2013 at 18:44

rgettman · Accepted Answer · 2013-06-25 18:51:55Z

1

You need to include in your classpath every class that is needed, including your jars in the "lib" directory and your .class files.

java -cp lib/*:bin DatabaseClientTest

The "-cp" is the option to include a classpath. "lib/*" means all jar files in the "lib" directory", and "bin" means all class files in the "bin" directory. The ":" separates multiple parts of the path, assuming you're on Unix/Linux.

Here's the link to the Java Tutorial on Classpath.

edited Jun 25, 2013 at 18:51

answered Jun 25, 2013 at 18:46

rgettman

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3 Comments

user1943079 Over a year ago

Do i run this from inside the bin folder?

rgettman Over a year ago

I had assumed that you are running your code from the directory that contains the "src", "lib", and "bin" directories, so that's how I constructed the command line.

user1943079 Over a year ago

Thanks!, i spent close to an hour for this issue since I usually use eclipse. Upvoted and approved ;)

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