import java.sql.*;

public class test
{
   public static void main(String[] args) throws Exception
   {
      String URL = "jdbc:mysql://localhost/test";
      String USER = "root";
      String PASS = "";
      String DRIVER = "com.mysql.jdbc.Driver";
      String sql;
      ResultSet rs;
      String class_;
      Statement stmt;
      
      
      DriverManager.registerDriver((Driver) Class.forName(DRIVER).newInstance());
      
      Connection con = DriverManager.getConnection(URL, USER, PASS);      

      stmt = con.createStatement(java.sql.ResultSet.TYPE_FORWARD_ONLY,
                                 java.sql.ResultSet.CONCUR_READ_ONLY);

      sql = "SELECT datetime1 FROM sometable";
      rs = stmt.executeQuery(sql);
      rs.next();
      class_ = rs.getObject("datetime1").getClass().getName();
      System.out.println("Class: " + class_);
      
      sql = "SELECT MAX(datetime1) FROM sometable";
      rs = stmt.executeQuery(sql);
      rs.next();
      class_ = rs.getObject("MAX(datetime1)").getClass().getName();
      System.out.println("Class: " + class_);

      sql = "SELECT MAX(datetime1) FROM sometable GROUP BY otherfield";
      rs = stmt.executeQuery(sql);
      rs.next();
      class_ = rs.getObject("MAX(datetime1)").getClass().getName();
      System.out.println("Class: " + class_);


     con.close();
   }
}