• db2jcc.jar
• db2jcc_license_cu.jar

on the classpath of the application. These can be found in the java/ sub-directory of the db2 install directory (Program Files/IBM/SQLLIB for me on Windows).

Connecting

The connection server string depends on whether you are using type2 or type4.

• Type 1: JDBC-ODBC Bridge
• Type 2: Native-API/partly Java driver
• Type 3: Net-protocol/all-Java driver
• Type 4: Native-protocol/all-Java driver

Source: http://www.javaworld.com/javaworld/jw-07-2000/jw-0707-jdbc.html

Type2:

jdbc:db2:database

Type4:

jdbc:db2//server[:port]/database

Sample code

Opens a connection, executes a query and then closes the connection.

/* Load the driver */
Class.forName("com.ibm.db2.jcc.DB2Driver").newInstance();

/* open the connection */
Connection conn = DriverManager.getConnection(url, user, password);

Statement st = conn.createStatement();

/* Execute a simple query to test the connection */
ResultSet rs = st.executeQuery("SELECT COUNT(*) FROM myTable");
rs.next();

/* Print the query results */
System.out.println(rs.getInt(1));

/* don't forget to close the connection */
conn.close();