Hi,

I have a frame containing a JTable and a panel with buttons. When the
window gets resized, I would like that the jtable takes the extra space and
that the button panel stays the same. How can I do that? The jtable panel
is already the "Center" and both panels stay the same...

Thanks,
Marie

Here's the code:

package test;

import javax.swing.*;
import java.awt.AWTEvent;
import java.awt.event.WindowEvent;
import java.awt.BorderLayout;
import java.awt.GridLayout;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;

public class Testframe extends JFrame {
   private JPanel mainPanel = new JPanel();
   private JPanel buttonPanel = new JPanel();
   private JPanel tablePanel = new JPanel();

   //Button panel
   private JButton applyTableBt = new JButton("Generate Table");
   private JButton addBt = new JButton("Add");
   private JButton editBt = new JButton("Edit");
   private JButton deleteBt = new JButton("Delete");
   private JButton matchBt = new JButton("Find");
   private JButton saveBt = new JButton("Save to file");
   private JButton loadBt = new JButton("Load from file");

   /**
    * Constructor.
    * @param a_parent Frame
    */
   protected Testframe() {
       enableEvents(AWTEvent.WINDOW_EVENT_MASK);
       try {
           jbInit();
           this.setResizable(true);
           this.setVisible(true);
           pack();
       } catch (Exception e) {
           e.printStackTrace();
       }
   }

   /**
    * Initialization of the dialog.
    * @throws Exception
    */
   private void jbInit() throws Exception {
       this.setTitle("Pattern management - CAT");
       Object[][] data = { {"11", "12", "13", "14", "15", "16", "17", "18"}
,
                         {"21", "22", "23", "24", "25", "26", "27", "28"}
       };
       Object[] names = {"col1", "col2", "col3", "col4", "col5", "col6",
                        "col7", "col8"};
       JTable table = new JTable(data, names);
       table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
       //table.setColu

       TableColumnModel colModel = table.getColumnModel();
       for (int i = 0; i < table.getColumnCount(); i++) {
           TableColumn column = colModel.getColumn(i);
           column.setPreferredWidth(511);
       }
       JScrollPane scrollPane = new JScrollPane(table);
       tablePanel.add(scrollPane);

       //Layout = vertical box with vertical gap
       buttonPanel.setLayout(new GridLayout(7, 1, 0, 5));
       buttonPanel.add(applyTableBt);
       buttonPanel.add(addBt);
       buttonPanel.add(editBt);
       buttonPanel.add(deleteBt);
       buttonPanel.add(matchBt);
       buttonPanel.add(saveBt);
       buttonPanel.add(loadBt);

       //mainPanel.setLayout(new BorderLayout());
       mainPanel.add(tablePanel, BorderLayout.CENTER);
       mainPanel.add(buttonPanel, BorderLayout.EAST);
       this.setContentPane(mainPanel);
   }

   /**
    * Overrides this class to call the good method when the dialog is
closed.
    * @param a_windowE WindowEvent
    */
   protected void processWindowEvent(WindowEvent a_windowE) {
       //If it is a request to close the window (X)
       if (a_windowE.getID() == WindowEvent.WINDOW_CLOSING) {
           cancel();
       }
       super.processWindowEvent(a_windowE);
   }

   /**
    * Closes the dialog.
    */
   private void cancel() {
       dispose();
   }

   private static void createAndDisplayFrame() {
       //Make sure we have nice window decorations.
       JFrame.setDefaultLookAndFeelDecorated(true);
       new Testframe();
   }

   public static void main(String[] args) {
       createAndDisplayFrame();
   }
}