How do enterprise beans access native libraries?

In short, they don't.

The EJB 1.1 Specification, section 18.1.2 (Programming Restrictions) lists some things that enterprise beans cannot do. In particular:

• The enterprise bean must not attempt to load a native library.

This function is reserved for the EJB Container. Allowing the enterprise bean to load native code would create a security hole.

The EJB 1.1 specification is available for download from http://java.sun.com/products/ejb/docs.html.