You can obtain JE by visiting the JE download page: http://www.oracle.com/technetwork/database/database-technologies/berkeleydb/downloads/index.html.
To install JE, untar or unzip the distribution to the
directory of your choice. If you use unzip, make sure to specify
the -U option in order to preserve case.
For more information on installing JE, see
JE_HOME/docs/relnotes.html,
where JE_HOME is the directory where you
unpacked JE.
JE is compatible with Java SE 8 (64-bit), and has been tested and certified against Oracle Java SE 8 and IBM Java IBM J9. It is recommended that you upgrade to the latest Java releases to take advantage of the latest bug fixes and performance improvements. The release notes included in the JE download specify the exact Java versions that have been used for certification.
Linux, Oracle Solaris, and AIX are officially supported platforms for JE. Both Oracle Solaris x86 and Oracle Solaris SPARC are supported. A 64 bit JVM is required in order to run JE.
You can use JE with your application by adding
JE_HOME/lib/je-<version>.jar
to your application's classpath.
Beyond this manual, you can find documentation for JE at
JE_HOME/docs/index.html
directory. In particular, complete Javadoc for the JE API set
is available at
JE_HOME/docs/java/index.html.