public static void main(String[] args) throws ClassNotFoundException, SQLException {
    // TODO code application logic here

    Class.forName("com.mysql.jdbc.Driver");
    Connection con = DriverManager.getConnection("jdbc:mysql:///check1","uname","pwd");
    Statement st = con.createStatement();
    ResultSet rs = st.executeQuery("select * from t1");
    while(rs.next()){
        System.out.println(rs.getObject(1)+ " "+ rs.getObject(2));
    }
    rs.close();
    st.close();
    con.close();

}

mysql> desc t1;
+--------+-------------+------+-----+---------+----------------+
| Field  | Type        | Null | Key | Default | Extra          |
+--------+-------------+------+-----+---------+----------------+
| rollno | bigint(20)  | NO   | PRI | NULL    | auto_increment |
| name   | varchar(40) | NO   |     | NULL    |                |
+--------+-------------+------+-----+---------+----------------+
2 rows in set (0.39 sec)