A coherent db application

Question

Hello,
The examples I obtained so far only "read" the database once thru main.
Are there any examples (transactional) that continuously add/update and delete records thru listeners? I want to interact with the database coherently.
Thanks
Jack
Edited by: luckiejacky on Jan 29, 2008 11:07 PM
Edited by: luckiejacky on Jan 29, 2008 11:08 PM

Answer 1

import java.awt.Button;
import java.awt.Color;
import java.awt.BorderLayout;
import java.awt.TextField;
import java.awt.Frame;
import java.awt.Font;
import java.awt.Label;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.FocusEvent;
import java.awt.event.FocusAdapter;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import org.apache.commons.dbutils.DbUtils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.MapListHandler;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Map;
import java.util.List;
class Quotation
   // please dynamically maintain an array for database use
   // By putting this onto the heap
   String QuotationID;
   String QuotationType;
   Quotation()
     QuotationID = null;
     QuotationType = null;
   String FindByQuotationNo(String Type)
     if (Type == "Test") {
      return "Q08011132";
     return "Error";
public class TestSwing extends Frame implements ActionListener
    Button post = new Button("Find");
    Label mouseLabel = new Label("");
    static Label QIDLabel = new Label("");
    static Label QTypeLabel = new Label("");
    private Label label = null;
    static Quotation quo = new Quotation();
    TestSwing(String title)
       super(title);
       super.setSize(500,400);
       mouseLabel.setFont(new Font("Arial", Font.BOLD, 20));
       mouseLabel.setBackground(Color.PINK);
       QIDLabel.setFont (new Font("Arial", Font.BOLD, 20));
       QIDLabel.setBackground(Color.PINK);
       QTypeLabel.setFont (new Font("Arial", Font.BOLD, 20));
       QTypeLabel.setBackground(Color.PINK);
       super.add(post, BorderLayout.NORTH);
     //  super.addWindowListener(new MyWindowListener());
       super.add(mouseLabel, BorderLayout.CENTER);
       super.add(QIDLabel, BorderLayout.CENTER);
       super.add(QTypeLabel, BorderLayout.CENTER);
  //     mouseLabel.addMouseListener(this);      // here //mouseLabel.addMouseListener(new MyMouseAdapter(mouseLabel));
//       QIDLabel.addMouseListener (new MyMouseAdapter(QIDLabel));
//     QTypeLabel.addMouseListener (new MyMouseAdapter(QTypeLabel));
    public void actionPerformed(ActionEvent e) {
      //  if (e.getSource() == exitButton) {
      //    dispose();
      //    System.exit(0);
         System.out.println("Hello");
    public void mouseClicked(MouseEvent e)
        int x = e.getX();
        int y = e.getY();
        String key = null;
        if (e.getButton() == e.BUTTON1)
           key = "left key";
        else if (e.getButton() == e.BUTTON3)
           key = "right key";
        label.setText ("X-" + x + "Y-" + y + "," +key);
    public static void main(String[] args)
      Connection conn = null;
      String jdbcURL = "jdbc:mysql://localhost/test";
      String jdbcDriver = "com.mysql.jdbc.Driver";
      String user = "root";
      String password = "football";
      TestSwing demo = new TestSwing("Hello World");
      demo.setVisible(true);
      String QuoType = quo.FindByQuotationNo ("Test");
      System.out.println(QuoType);
      try {
         DbUtils.loadDriver(jdbcDriver);
         conn = DriverManager.getConnection(jdbcURL, user, password);
         QueryRunner qRunner = new QueryRunner();
         List mapList = (List) qRunner.query (conn, "select * from testtable",
                  new MapListHandler());
         for (int i = 0; i < mapList.size(); i++) {
             Map map = (Map) mapList.get(i);
             System.out.println ("Quotation_ID          Type");
             System.out.println ("==========================");
//             System.out.println (map.get("QID").toString()+ map.get("QTYPE").toString());
             QIDLabel.setText(map.get("QID").toString());
             QTypeLabel.setText(map.get("QTYPE").toString()); 
      } catch (SQLException e) {
        e.printStackTrace();
      } finally {
        DbUtils.closeQuietly(conn);
}Changed something
Thanks
Jack
Edited by: luckiejacky on Jan 31, 2008 10:12 PM