Java Database Connectivity 4.3
· This feature enables the configuration of DataSources to access Databases from applications. Any JDBC driver that complies with the JDBC 4.3, 4.2, 4.1, 4.0, 3.0, or 2.x specification can be used; customized configuration of many specific providers is included. High performance connection pooling is also provided.
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window jdbc-4.3-23.0.0.8.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.