Here is an example to connect your JDBC code to MySQl database. You have to download mysql.jar for the JDBC driver class from here. If you are not copying the mysql.jar file in the classpath, you will get the following error.
MySQL
JDBC connection in JDeveloper with MySQL database
The Java Database Connectivity (JDBC) API is used to access a SQL database from a Java application. JDBC also supports tabular data sources, such as a spreadsheet. Oracle JDeveloper is a free Integrated Development Environment (IDE) for modeling, developing, debugging, optimizing, and deploying Java applications. JDeveloper 10g is used to develop J2EE applications comprising the JSPs, …