How do you add a JAR file to an already existing Java library in Eclipse? Note that this is not a user library.
That is, if you look at the Java Build Path for a Ja
In Eclipse Ganymede (3.4.0):
As of Helios Service Release 2, there is no longer support for JAR files.You can add them, but Eclipse will not recognize them as libraries, therefore you can only "import" but can never use.
In eclipse Galileo :
From there you can Add External Jars
You might also consider using a build tool like Maven to manage your dependencies. It is very easy to setup and helps manage those dependencies automatically in eclipse. Definitely worth the effort if you have a large project with a lot of external dependencies.