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JucaDB is a relational database engine written in Java, supporting a subset of ANSI SQL-92. There is a JDBC driver with full suport. Client-server, referential-integrity and other features are implemented.
Middlegen is a free general-purpose database-driven code generation engine based on JDBC, Velocity, Ant and XDoclet. If you already have a database, you can use Middlegen to generate EJB (CMP 2.0), Hibernate, JDO and JSP/Struts source code.
JDBM is a transactional persistence engine for Java. It aims to be for Java what GDBM is for Perl, Python, C, etcetera: a simple persistence engine that is lightweight and fast.
Note that JDBM's development has moved on to github - https://github.com/jankotek/JDBM3 is now the new home.
Our generous forever free tier includes the full platform, including the AI Assistant, for 3 users with 10k metrics, 50GB logs, and 50GB traces.
Built on open standards like Prometheus and OpenTelemetry, Grafana Cloud includes Kubernetes Monitoring, Application Observability, Incident Response, plus the AI-powered Grafana Assistant. Get started with our generous free tier today.
graphite: a portable graphics library, written in Java, JOGL and Postscript that allows rapid generation of high-quality graphs using an efficient, compact Java engine.
myDbSearcher is a search engine for MySQL Databases. It is written in Java. It scans several tables on different databases. A XMLRPC-Server will give you access to the Index.
Currently it runs on http://www.idowa.de/ueberblick/suche/index_html
XQEngine is a Java component for searching collections of XML documents that uses an XQuery front end. The engine has a straightforward API that allows it to be easily embedded in end user applications. Requires some basic Java programming skills.
Gemello is a relational database written in pure Java. Its design is aimed at teaching. If you're searching for a fast relational engine, Gemello won't be a good choice. Is's rather a good and simple example of relational database implementation.
Algernon is a rule-based reasoning engine written in Java. It allows forward and backward chaining across Protege knowledge bases. In addition to traversing the KB, rules can call Java functions and LISP functions (from an embedded LISP interpreter)
TM4J is a topic map engine implemented entirely in Java. Topic maps are a standard paradigm for the interchange of knowledge structures. This project aims to produce a complete suite of tools for creating, processing and publishing topic map information.
Chameleon is a general use persistence engine capable of object-relational mapping as well as other, non-object persistence needs. Its flexibility allows it to fit the needs of a an enterprise without the contstraints that O/R mappers generally impose
JavaMatch is an engine that can search inside a runtime Java data structures, and look for objects that best match the criteria that you specify. The extensive query mechanism allows for highly customizable tuning of your match queries.
Polish Flexion Engine provides ready-to-use polish flexion dictionary with flexion engine for full flexion text search easily integrated in portals, web search,database searching engines. First aim is polish flexion (pl. polska fleksja).Demo on Home Page
Molimo project is a open, customizable database (just like the one from well known search engine company, but not only free but open). So far a generic DB mapper has been developed as back end that can handle runtime changes of attributes and types.
dbload is an ETL engine that will permit esier data loading in a selected target database. Summary of features available are: load and dump of data in XML, text or binary format, real time data transfer and manipulation, dynamic data transformation rules
PAiN Mud codebase is a new MUD codebase written in Java. It provides general purpose persistence engine (PAiN DB) and ability of dynamic code reloading.
JETHRO (Java Engine for Translating and Hiding Relational to Object) is a "bottom-up" persistence framework, designed in an "API+Provider" fashion. Based on the Data Transfer Object (DTO) concept, it offers a Transparent Query engine.
Jaxor provides a java code generation engine for creating an object to relational mapping layer based upon XML metadata. SQL is generated as well as an extensible mapping layer.
The goal of this project is to develop a modular SQL engine (JDBC driver) that can be grafted onto any raw database (such as a large flat ASCII file) through a database module API. Writing database drivers is much easier that writing a whole RDBMS.
jxUtil serves as a collection of source code which solves tiny/small programming problems using the Java language.
It also contains ready-to-use modules for JDBC RowSet, XFS and DRDA protocol engine.
LeverPack is a small, transaction based, secure, concurrent, and efficient record repository management engine written in Java. It provides READ_COMMITTED transaction isolation level supported read/write access to user data records.
Java Data Engine API. Why not (try to!) forget data distribution and management headaches in distributed environments. Ready to start examples included.
XML database engine for mobile devices (iPaq, Palm, etc.). The core of the system is Java based, this way it makes it portable and able to run on different systems. It's very lightweight and runs on devices with little memory and storage place.