Example: Create a procedure with return values

import java.sql.*;
import java.util.Properties;

public class CallableStatementExample3 {

    public static void main(java.lang.String[] args) {

        // Register the native JDBC driver. If the driver cannot
        // be registered, the test cannot continue.
        try {
            Class.forName("com.ibm.db2.jdbc.app.DB2Driver");

            // Create the connection properties
            Properties properties = new Properties ();
            properties.put ("user", "userid");
            properties.put ("password", "password");

            // Connect to the local iSeries database
            Connection c = DriverManager.getConnection("jdbc:db2://*local", properties);

            Statement s = c.createStatement();

            // Create a procedure with a return value.
            String sql = "CREATE PROCEDURE MYLIBRARY.SQLSPEX3 " +
                         " LANGUAGE SQL SPECIFIC MYLIBRARY.SQLSPEX3 " +
                         " EX3: BEGIN " + 
                         "      RETURN 1976; " +
                         " END EX3 ";

            try {
                s.executeUpdate(sql);
            } catch (SQLException e) {
                // NOTE:  The error is ignored here. The assumptions is 
                //        made that the only reason this fails is
                //        because the procedure already exists. Other
                //        reasons that it could fail are because the C compiler
                //        is not found to compile the procedure or because
                //        collection MYLIBRARY does not exist on the system.
            }
            s.close();

            // Prepare a callable statement used to run the procedure.
            CallableStatement cs = c.prepareCall("? = CALL MYLIBRARY.SQLSPEX3");

            // You still need to register the output parameter.
            cs.registerOutParameter(1, Types.INTEGER);

            // Run the procedure.
            cs.executeUpdate();

            // Show that the correct value is returned.
            System.out.println("The return value
                                should always be 1976 for this example:
                                -->  " + cs.getInt(1));

            cs.close();  // close the CallableStatement object
            c.close();   // close the Connection object.

        } catch (Exception e) {
            System.out.println("Something failed..");
            System.out.println("Reason: " + e.getMessage());
            e.printStackTrace();
        }
    }
}