1. Lecture 11 Object Oriented Programming Using Java
By Rashid Ahmad
Department of Computer Science
University of Peshawar

2. Java Database Connectivity
Introductory concepts to databases.
A shared collection of logically related data, designed to meet the
Information needs of an organization.
Examples of Data Storages
Microsoft Access
Foxpro
Microsoft SQL SERVER
MySQL
Oracle

3. How to connect to data sources
The answer is ODBC
Open Database Connectivity, or ODBC is a standard for accessing
Data. It was designed to allow the programmers to use a common
Set of routines to access data stored in database.
Application
What about Excel, Word,
Outlook Express Mail
How ODBC Works
ODBC
Access
SQL
Server
Oracle

4. Universal Data Access What is ADO Definition for a data store
Any persisted collection of information is a data store.
OLEDB (Object linking and Embedded Databases)
It allows access to a much broader range of data stores.
Application
What is ADO
OLE-DB
ODBC
ODBC
Data
Access
SQL
Server
Oracle
MySQL
Excel

5. Connecting Java to Microsoft Access
First Step is to create a DSN (Data Source Name)
A data source name (DSN) is a data structure that contains the
Information about a specific database that an Open Database
Connectivity ( ODBC) driver needs in order to connect to it.
Kinds of a DSNs
User DSNs
System DSNs
File DSNs
How to Create a DSN

6. Steps to connect to a database
Loading the database driver
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connecting to the DSN
connection=DriverManager.getConnection("jdbc:odbc:sampledb");
Building a statement
statement = connection.createStatement();
Executing a query
boolean foundresults = statement.execute(v_Query);
resultset = statement.getResultSet();
What is a ResultSet and Command Object

7. A simple program on connecting an Access Database
package jdbc;
import java.sql.*;
import java.util.*;
public class Main {
private Connection connection;
private Statement statement;
private ResultSet resultset;
public Main() { }
public static void main(String[] args) {
Main obj = new Main();
obj.fnPickData();

8. A simple program on connecting an Access Database
public void fnPickData(){
int v_Counter = 0;
try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
connection=
DriverManager.getConnection
("jdbc:odbc:sampledb");
String v_Query = "Select * FROM Personal";
statement = connection.createStatement();
boolean foundresults = statement.execute(v_Query);
resultset = statement.getResultSet();

9. while(resultset.next()){
System.out.println("User ID: " +
resultset.getObject("ID").toString());
System.out.println("User Name: " +
resultset.getObject("Name").toString());
System.out.println();
++v_Counter; }
connection.close();
if (v_Counter == 0){
System.out.println("No record found");
} }
catch(Exception ex){
System.out.println(ex.getMessage());
} } }

11. A Full Fledge JDBC Application
package jdbc;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.*;
import java.awt.*;
import java.awt.Event.*;
import javax.swing.*;

12. public class PersonalForm extends JFrame
implements ActionListener {
private Connection connection;
private Statement statement;
private ResultSet resultset;
private JButton btninsert,btnsearch,btndelete,btnupdate;
private JLabel lblname,lblid;
private JTextField txtname,txtid;
private Container content;
public String v_StudentID,v_Qry = "";

13. public PersonalForm() {
super("Database Access");
content = getContentPane();
content.setLayout(new FlowLayout());
lblid = new JLabel("Student ID");
content.add(lblid);
txtid = new JTextField("Student ID Here");
txtid.setEditable(false);
content.add(txtid);
lblname = new JLabel("Student Name");
content.add(lblname);
txtname = new JTextField("Enter User Name");
//txtname.setSize(50,10);
content.add(txtname);

14. btninsert = new JButton("Insert");
content.add(btninsert);
btnsearch = new JButton("Search");
content.add(btnsearch);
btnupdate = new JButton("Update");
content.add(btnupdate);
btndelete = new JButton("Delete");
content.add(btndelete);
btninsert.addActionListener(this);
btnsearch.addActionListener(this);
btndelete.addActionListener(this);
btnupdate.addActionListener(this);
setSize(200,200);
setVisible(true); }

15. Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
public void fnTransactions(String v_Query,String v_Operation){
int v_Counter = 0;
try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
connection=DriverManager.getConnection("jdbc:odbc:sampledb");
statement = connection.createStatement();
if(v_Operation != "search") {
int foundresults = statement.executeUpdate(v_Query);
if (foundresults > 0)
JOptionPane.showMessageDialog
(null,"Your requested changes made successfully");
txtid.setText("");
txtname.setText(""); }

16. else if(v_Operation == "search"){
statement.execute(v_Query);
resultset = statement.getResultSet();
while(resultset.next()){
txtid.setText(resultset.getObject("ID").toString());
txtname.setText(resultset.getObject("Name").toString());
++v_Counter; }
if(v_Counter == 0)
JOptionPane.showMessageDialog(null,"Record Not Found");
} }
connection.close(); }
catch(Exception ex){
JOptionPane.showMessageDialog(null,ex.getMessage()); } }

17. public void actionPerformed(ActionEvent ev){
if(ev.getSource() == btninsert){
v_Qry = "INSERT INTO Personal(Name) VALUES('" + txtname.getText() + "')";
fnTransactions(v_Qry,"insert"); }
if(ev.getSource() == btnsearch){
v_StudentID = JOptionPane.showInputDialog("Enter ID to Search");
v_Qry = "SELECT * FROM Personal WHERE ID = " + v_StudentID;
fnTransactions(v_Qry,"search"); }
if(ev.getSource() == btnupdate){
v_StudentID = JOptionPane.showInputDialog("Enter Student ID to delete");
v_Qry = "UPDATE Personal SET Name = '" + txtname.getText() + "'" +
"WHERE StudentID = '" + v_StudentID + "'";
fnTransactions(v_Qry,"update"); }
if(ev.getSource() == btndelete){
v_Qry = "DELETE FROM Personal WHERE ID = " + v_StudentID;
fnTransactions(v_Qry,"delete"); } } }

18. Output of the Program