Command Prompt Java

**kelvinsmj** · 11-26-2009, 09:21 AM

Hi I have project in eclipse with packages

com.mypackage.abc.java
com.mypackage.def.java

I can run both programs in eclipse fine, but i want to run it from command prompt.

The root of my source file is c:\project\src
Classes for these are at c:\project\target
so I change directory to
c:\project\target
java -classpath . com.mypacakage.abc

but it returns NoClassDefFoundError

can someone please help.

**JosAH** · 11-26-2009, 09:39 AM

Originally Posted by kelvinsmj

Hi I have project in eclipse with packages

com.mypackage.abc.java
com.mypackage.def.java

I can run both programs in eclipse fine, but i want to run it from command prompt.

The root of my source file is c:\project\src
Classes for these are at c:\project\target
so I change directory to
c:\project\target
java -classpath . com.mypacakage.abc

but it returns NoClassDefFoundError

can someone please help.

Can you find your .class files in your target (sub)directory? e.g. c:\project\target\com\mypackage\abc.class

kind regards,

Jos

**kelvinsmj** · 11-26-2009, 09:45 AM

Hi Jos, thanks for your reply. Yes I can find those classes in there.

**JosAH** · 11-26-2009, 09:54 AM

Originally Posted by kelvinsmj

Hi Jos, thanks for your reply. Yes I can find those classes in there.

Well, then the following should work (note the typo in your original post: pacakage != package)

c:\project\target
java -classpath . com.mypackage.abc

kind regards,

Jos

**kelvinsmj** · 11-26-2009, 10:02 AM

sorry about my typo, i've read it onthe web that this is how i am suppose to do it like what you are saying, but for some strange reason, it doesn't work for me, really weird.
if i package it into a jar file then it works

**JosAH** · 11-26-2009, 10:40 AM

Originally Posted by kelvinsmj

sorry about my typo, i've read it onthe web that this is how i am suppose to do it like what you are saying, but for some strange reason, it doesn't work for me, really weird.
if i package it into a jar file then it works

Did you do "cd c:\project\target" before you run your java.exe command? i.e. it has to be the current directory for "-classpath ." flag to work.

kind regards,

Jos

**kelvinsmj** · 11-26-2009, 02:02 PM

yes I did. I changed directory to the directory where the com directory is located (ie c:\project\target" before I run the command.

**JosAH** · 11-26-2009, 05:17 PM

Originally Posted by kelvinsmj

yes I did. I changed directory to the directory where the com directory is located (ie c:\project\target" before I run the command.

Well, last question then: are all the class files there in their correct (sub)directory? (you should be able to check all this yourself when things don't work as you expected).

kind regards,

Jos