FirstSQL, released as FirstSQL/J, is an Object-Relational Database Management System (ORDBMS) written fully in Java. It provides intermediate level support to the SQL92 standard and full Java object capabilities in the physical database using Java classes. SQL is the data access language and Java Database Connectivity (JDBC) is used as the client interface. In addition to the primitive data types, columns of the database can map to Java Objects. Moreover, stored procedures written in Java can be called by JDBC. Application developers can combine the their database and application code into a single .jar file and execute on any device, embedded system, or server computing platform with a Java Virtual Machine.
The development of FirstSQL/J started in 2001. The first publicly available version FirstSQL/J v1.0 was released in February 2002. It has since been undergoing continuous development and support. In addition to the original Enterprise and Professional versions, which are intended for servers and desktop computers, versions to be used for embedded systems and Android devices were released in October 2005 and October 2015, respectively.
http://www.firstsql.com/overview.shtml
FirstSQL Software
2001