Display Fields in JTable

Question

Hi I 've successfully created a JTable that connected to the MySQL databases that I've created previously. I am able to display the Table using Query like this :
rs = stmt.executeQuery("SELECT * FROM commenttable where tradeName like 'P%'");
However, I would like the user to be able to type in keywords in a textbox and search by click the search button and display the table according to the keyword.....But i don't know how to do it... hope someone can help me out here... Thanks beforehand~
Tony

Answer 1

ok it was really buggin me so i figured somethings out about your code.
the main problem is that your button event is not firing, this is due to where you have placed the code in your constructor. you should consider cleaning up your coding style and have your code in logical sections.
putting
System.out.println("button clicked");
in your button event listener informed me that its event wasnt firing when clicked. this was because you added the action listener to your button AFTER you had added the button to the panel, and the panel to the content pane. so it never got registered.
try this code for your program (it may not work straight away cos i changed some stuff to work with my database.) ive changed a lot of code around in your program but check it out.
import javax.swing.*;
import javax.swing.border.*;
import java.awt.*;
import java.sql.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
public class testing extends JFrame {
     private ResultSet rs;
     private Connection con;
     private ResultSetMetaData rsmd;
     private JTextField search;
     private JLabel jlsearch;
     private JButton jbtSearch;
     //ADDED THIS
     JTable table;
     JScrollPane scrollPane;
     Container c;
     public static void main(String args[]) throws Exception {
          testing app = new testing();
     public testing() {
          super("testing");
          try {
               Class.forName("com.mysql.jdbc.Driver").newInstance();
               con = DriverManager.getConnection(
               "jdbc:mysql://localhost/companyinfo?user=root&password=");
               catch (Exception e){
               System.err.println("Unable to find and load driver");
               System.exit(1);
          setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
          JPanel p = new JPanel();
          p.setLayout(new FlowLayout());
          p.add(jlsearch = new JLabel("Search: "));
          //ADDED THIS
          table = new JTable(10,10);
          table.setPreferredScrollableViewportSize(new Dimension(500, 70));
          scrollPane = new JScrollPane(table);
          search = new JTextField(10);
          jbtSearch = new JButton("Search");
          jbtSearch = new JButton("Search");
          jbtSearch.addActionListener(new ActionListener(){
                    public void actionPerformed(ActionEvent e) {
                         System.out.println("button clicked");
                         queryDatabase();
          p.add(search);
          p.add(jbtSearch);
          c = this.getContentPane();
          c.add(p, BorderLayout.NORTH);
          c.add(scrollPane, BorderLayout.CENTER);
          pack();
          setVisible(true);
     public void queryDatabase() {
          System.out.println("querying");
          Vector data = new Vector();
          Vector rowSet;
          Vector tableNames = new Vector();
          int colCount = 0;
          String keyword = search.getText();
          try{
               con.setCatalog("companyinfo");
               Statement stmt = con.createStatement();
               rs = stmt.executeQuery("SELECT recordedTime, comment FROM commenttable where tradeName like '%" + keyword + "%'");
               //rs = stmt.executeQuery(query);
               rsmd = rs.getMetaData();
               colCount = rsmd.getColumnCount();
               tableNames.add("Recorded Time");
               tableNames.add("Comment");
               while(rs.next()){
               rowSet = new Vector();
               for(int i = 0;i < colCount; i++){
               rowSet.add(rs.getObject(i+1));
               data.add(rowSet);
          catch (SQLException e){
               e.printStackTrace();
          table = new JTable(data, tableNames);
          table.setPreferredScrollableViewportSize(new Dimension(500, 70));
          scrollPane = new JScrollPane(table);
          c.remove(1);
          c.add(scrollPane, BorderLayout.CENTER);
          c.validate();
}if it works, you owe me one cos i just spent an hour messing around with it. didnt have much else to do!!!!