How to refer a .jar file in the code.

How to refer a .jar file in the code.
I want to use a library dnsjava.jar, which I download from the internet. I want to know how to refer it
If I am compiling the code on Solaris
If I compiling the code on windows using eclipse.
I added the following line in my code to refer to this library. But it always complains of not found the class
import org.xbill.DNS.*;
I tried the following to add this library but did not work
On eclipse/windows: Went to window-> preferences -> BuildPath _> class path Variable.
On Solaris: Could not add this library /opt/java_reference/v1.6.0_04/jre/lib. Although I am logged in as root, but not able to add the library there. Complains of Permission denied.

Set the classpath option when compiling.
javac -classpath /path/to/lib/dnsjava.jar YourProgram.java
I don't use Eclipse, but it probably has a library list on your project preferences. Add it there.
Regards,
Henrique Abreu

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Edited by: Adam-Z. on Feb 24, 2010 5:42 AM

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