Refresh JTable in JFrame by clicking button from other JFrame

Question

We have this Java 101 class, we're using Netbeans 7.2.1. as of now we're at adding data from database (MySql). i have this problem:

I two (2) JFrame - mainFrame (1), addForm (2)

In the mainFrame I use table to view my data (LastName, FirstName) and (add)button and I got (refresh) button which I click to refresh my table every time I changed it. in the second frame (addForm) I got text fields (for lastname, firstname)and a (save) button.

Scenario

From the mainFrame I click (add) button, then addForm comes up. I supply data to (LastName, FirstName) fields and clicked Save button to saved data. After that I need to go back to mainFrame to click refresh button to view the newly added data to my table.

Problem

Is there a way to automatically refresh my JTable after I saved my data?

Because when I click saved it doesn't appear to table I always click refresh from mainFrame to see it. I can see it automatically when using only one JFrame (from youtube tutorial credits to uploader).

Hoping for your time to teach me. I've search over internet but failed to grasp the answer. thanks in advance.

See [The Use of Multiple JFrames, Good/Bad Practice?](http://stackoverflow.com/a/9554657/418556) — Andrew Thompson, Mar 17 '13 at 00:36
thank you drew. at least now i know when to use other jFrame :) — user2178272, Mar 17 '13 at 00:49
possible duplicate of [The Use of Multiple JFrames, Good/Bad Practice?](http://stackoverflow.com/questions/9554636/the-use-of-multiple-jframes-good-bad-practice) — EdChum, Mar 17 '13 at 08:54

Hovercraft Full Of Eels · Accepted Answer · 2013-03-17T01:02:05.063

This same question gets asked a lot on this site, and the solution is almost always the same:

If you need to have the user deal with input that the main window depends on, don't use a second JFrame when a modal dialog is what you need. Use a modal JDialog or a JOptionPane to display your dependent window. When you do this, the program flow from the main window will be interrupted until the dialog has been fully dealt with, and this way it will be easy for the main program to detect when the user has completed actions with the dependent window as the program flow will resume from immediately after the spot when the dependent window, the model dialog, has been displayed. You can then query the fields displayed by the dependent window and use the information so contained to update your JTable's model.

Note that another option is to show the second view as a new view on the main window using a CardLayout to swap views.

If on the other hand the main window doesn't absolutely depend on the user dealing with the second window, then consider showing it as either a non-modal dialog or as a separate view via a CardLayout or a JTabbedPane.

For example:

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;

import javax.swing.*;
import javax.swing.table.DefaultTableModel;

public class DialogEg {

   private static void createAndShowGui() {
      MainWin mainPanel = new MainWin();

      JFrame frame = new JFrame("DialogEg");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.getContentPane().add(mainPanel);
      frame.pack();
      frame.setLocationByPlatform(true);
      frame.setVisible(true);
   }

   public static void main(String[] args) {
      SwingUtilities.invokeLater(new Runnable() {
         public void run() {
            createAndShowGui();
         }
      });
   }
}

class MainWin extends JPanel {
   private String[] COL_NAMES = { "Last Name", "First Name" };
   private DefaultTableModel model = new DefaultTableModel(COL_NAMES, 0);
   private JTextField lastNameField = new JTextField(15);
   private JTextField firstNameField = new JTextField(15);

   public MainWin() {
      final JPanel dataPanel = new JPanel();
      dataPanel.add(new JLabel("Last Name:"));
      dataPanel.add(lastNameField);
      dataPanel.add(Box.createHorizontalStrut(15));
      dataPanel.add(new JLabel("First Name:"));
      dataPanel.add(firstNameField);

      JPanel btnPanel = new JPanel();
      btnPanel.add(new JButton(new AbstractAction("Add Name") {

         @Override
         public void actionPerformed(ActionEvent arg0) {
            lastNameField.setText("");
            firstNameField.setText("");
            int result = JOptionPane.showConfirmDialog(MainWin.this, dataPanel,
                  "Enter Name", JOptionPane.OK_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE);
            if (result == JOptionPane.OK_OPTION) {
               String lastName = lastNameField.getText();
               String firstName = firstNameField.getText();
               Object[] dataRow = new String[] { lastName, firstName };
               model.addRow(dataRow);
            }
         }
      }));

      setLayout(new BorderLayout());
      add(new JScrollPane(new JTable(model)), BorderLayout.CENTER);
      add(btnPanel, BorderLayout.SOUTH);

   }
}

thnx hover. im gonna search now about jDialog, CardLayout and TabbedPane. research, research, research to be a java programmer. super excite every time i learn something new =) — user2178272, Mar 17 '13 at 00:52
@user2178272: you're welcome. Please see edit for example using a JOptionPane. Note that the option pane's second parameter can be anything, including a JPanel that holds components for display. — Hovercraft Full Of Eels, Mar 17 '13 at 01:02
hi hover, i finally able to do it. for student have a question like mine. ive use jDialog. it looks like a jFrame, you can put design on it. the best part is you can setText(), getText() use variables locally. no need to call on other class. thanks for the example drew. — user2178272, Mar 17 '13 at 23:25

Refresh JTable in JFrame by clicking button from other JFrame

Scenario

Problem

1 Answers1