Java Database Connectivity 4.2
· This feature enables the configuration of DataSources to access Databases from applications. Any JDBC driver that complies with the JDBC 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-4.2-23.0.0.8.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.