I need a little help connecting to a database in Java.

The example in the book I have uses the following:

static final String JDBC_DRIVER = "com.ibm.db2j.jdbc.DB2jDriver";
static final String DATABASE_URL = "jdbc:db2j:books";


It goes on to use it:


System.setProperty("db2j.system.home", "C:/mysql");
Class.forName(JDBC_DRIVER);
Connection connect;
connect = DriverManager.getConnection(DATABASE_URL);


First off the book uses a Cloudscape DB, I'm using mysql. My question
is, where does the information for the JDBC_DRIVER and DATABASE_URL
come from? Are the drivers included in the Java software or do I need
to download it?