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When I am using JInternalFrame where and how am I able to connect a MS Access database using a separate class? I already create a class as the following.
import java.sql.*;
import javax.swing.*;
public class Connect {
Connection conn = null;
ResultSet rs = null;
PreparedStatement pst = null;
public static Connection ConnectDB(){
        Connection conn = DriverManager.getConnection("jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)}; DBQ=Database1.mdb");
        JOptionPane.showMessageDialog(null, "Connection Established");
        return conn;
    }catch(Exception e){
        JOptionPane.showMessageDialog(null, e);
        return null;
The JInternalFrame as
public class ItemDetails extends javax.swing.JInternalFrame{

I think in this JInternalFrame's inside I should put my database connecting statements. But Where and how?

Thank You
Posted 23-Dec-12 1:30am

1 solution

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Solution 1

That's the constructor. That one is by definition not supposed to execute code.
public class ItemDetails extends JInternalFrame{
  private Connection oConnection = null;
  public ItemDetails(){
  private Connection getDBConnection(){
    if(null == oConnection){
      Connection oConnection = Connect.ConnectDB();
    return oConnection;
you can at any time access that function and try to get the connection.
If it is not valid, the connection is created new. Interesting, because server connection get sometimes "lost" (e.g. due to exceptions).
TorstenH. at 23-Dec-12 7:06am
oh - keep the other class for creating the connection. That has nothing to do with the GUI - so it should stay separated.

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