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Java DB. Java DB is Oracle's supported distribution of the open source Apache Derby database. Its ease of use, standards compliance, full feature set, and small footprint make it the ideal database for Java developers. Java DB is written in the Java programming language, providing "write once, run anywhere" portability ...

For connections to Db2, in general, Java applications use JDBC for dynamic SQL and SQLJ for static SQL. For connections to IBM Informix, SQL statements in JDBC or SQLJ applications run dynamically.

The current Db2 LUW product runs on multiple Linux and UNIX distributions, such as Red Hat Linux, SUSE Linux, AIX, HP/UX, and Solaris, and most Windows systems. Multiple editions are marketed for different sizes of organization and uses.

For connections to Db2, in general, Java applications use JDBC for dynamic SQL and SQLJ for static SQL. For connections to IBM Informix, SQL statements in JDBC or SQLJ applications run dynamically.

The steps for establishing a connection are: Load the JDBC driver by invoking the Class. forName method. If you are using JDBC 4.0 or later, you do not need to explicitly load the JDBC driver. ... Connect to a data source by invoking the DriverManager. getConnection method.