Oracle JDeveloper comes with standard libraries to help Java application programming. These libraries include API support for Application Development Framework (ADF), Oracle libraries for JDBC, JSP, and so on.
To use JDBC in your project, you import the Oracle JDBC library into the project. Similarly, to use JSP technology, you import the JSP Runtime library.
Important packages of the Oracle JDBC library include the following:
oracle.jdbc: The interfaces of the oracle.jdbc package define the Oracle extensions to the interfaces in the java.sql package. These extensions provide access to Oracle SQL-format data and other Oracle-specific features, including Oracle performance enhancements.
oracle.sql: The oracle.sql package supports direct access to data in SQL format. This package consists primarily of classes that provide Java mappings to SQL data types and their support classes.
oracle.jdbc.pool: This package includes the OracleDataSource class that is used to get a connection to the database. The overloaded getConnection method returns a physical connection to the database.