Clicking on JTable cells

is there a way of maximising a particular cell of a JTable when it is clicked or double clicked?

Replace the JTable by a JPanel with a CardLayout. Display the table on its first "card". When clicking on the cell, add a second card to the CardLayout with whatever is needed to display it and switch to it. If the table is in a JScrollPane, you may have to play with the size of the JPanel when switching so that the scroling is properly handled.

Similar Messages

Detecting mouse clicks in editable cell of JTable

Hi everyone :)
I thought that this question might have been asked before, but I have searched the forums extensively and have not been able to find the solution.
What I want to achieve is to detect single and double mouse clicks on JTable cells (that are editable).
For example, I have a JTable and there exists within it an editable cell. If the user clicks on it once then that cell goes into edit mode, and the user can type directly into the cell. I have already successfully implemented this.
However, what I also want to do is detect a double-click so that I can pop up a dilaog that shows a list of default values that the user can select.
So here is what I want;
1. User clicks on the cell once.
2. Cell moves into edit mode.
3. If the user clicks again within a certain time interval then cancel edit mode and pop up a dialog containing values that the user can select from.
I think that to do this I need to be able to detect mouse clicks on the cell that is currently being edited. So far I have been unable to discover how this is done. I have even tried extending JTextField to get what I want, but with no luck.
Any help would be greatly appreciated.
Kind regards,
Ben Deany

Thanks for the reply.
Unfortunately, it is not possible to call 'AddMouseListener()' on a cell editor. You are only able to call 'addCellEditorListener()' and that only allows two events to the broadcast (edit cancel, and edit stop).
Ben

Problem while displaying the data when double clicked on JTable element

Hi All,
i have one List box( JList ) and one table (JTable). Both JTable and JList are positioned on the same Frame. I am able to drag the elements from JList to JTable and also i have added the mouse click action on both List box and JTable.
if i double click on JList element, that will popup one dialog box.
if i double click on JTable cell element that was dragged from JList, that will popup same dialog box which was opened earlier for JList action.
But my problem here is:
Suppose if i drag the four elements one by one from JList to JTable and (after four elements dragged) double clicked the first element which was dragged first that displayed the popup dialog box structure correctly but the data displayed in that was not correct. It is showing the data of recent dragged element( i.e, fourth element).
But if i double click on JList element that is showing the correct data according to the double clicked element.
What might be the problem here, why it was not displaying the correct data when double clicked on JTable element.
Please help me here.
Many thanks in advance.
The following code is used in mouse clicked event method of JList
private void listMouseClicked(java.awt.event.MouseEvent evt) {
         if(evt.getClickCount()==2){
         AssigningResourcesUI assignResource=new AssigningResourcesUI(this,true);
         assignResource.show();
}                AND The following code is used in mouse click enevet method of JTable.
private void tableMouseClicked(java.awt.event.MouseEvent evt) {
        if(evt.getClickCount()==2){
         int row=table.rowAtPoint(new Point(evt.getX(), evt.getY()));
         int col=table.columnAtPoint(new Point(evt.getX(), evt.getY()));
         if(row==-1||col==-1){
             return;
          Object obj=table.getModel().getValueAt(row, col);
         if(obj==null||(obj.equals(""))){
           }else{
         AssigningResourcesUI assignResource=new AssigningResourcesUI(this,true);
         assignResource.show();
     }            Thanks & Regards,
Maadhav....
Edited by: maadhav on Jul 1, 2009 7:22 AM

I doubt it is related to your problem but:
int row=table.rowAtPoint(new Point(evt.getX(), evt.getY()));Why are you creating a new Point? Just use evt.getPoint().
Object obj=table.getModel().getValueAt(row, col);Don't get the data through the model method, get the data through the table method:
Object obj = table.getValueAt(...)
This way it will work even if the table happens to be sorted.
Instead of creating a AssigningResourcesUI object, just disply the value retrieved from the model. That way you know whether the problem is with the mouse event code or your UI class. Like Walter suggested above I"m guess the problem is with your UI class.

Unable to edit cells in JTable on single click of the cell.

Hi,
I am unable to edit a cell in JTable on single click of the cell. If I double click on the cell, I am able to edit it. Please help me.
Thanks
Subbu

Thanks for all replies. Now, i am able to edit the cell on single click.

Multiple JButtons inside JTable cell - Dispatch mouse clicks

Hi.
I know this subject has already some discussions on the forum, but I can't seem to find anything that solves my problem.
In my application, every JTable cell is a JPanel, that using a GridLayout, places vertically several JPanel's witch using an Overlay layout contains a JLabel and a JButton.
As you can see, its a fairly complex cell...
Unfortunately, because I use several JButtons in several locations inside a JTable cell, sometimes I can't get the mouse clicks to make through.
This is my Table custom renderer:
public class TimeTableRenderer implements TableCellRenderer {
     Border unselectedBorder = null;
     Border selectedBorder = null;
     public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
               boolean hasFocus, int row, int column) {
          if (value instanceof BlocoGrid) {
               if (isSelected) {
                    if (selectedBorder == null)
                         selectedBorder = BorderFactory.createMatteBorder(2,2,2,2, table.getSelectionBackground());
                    ((BlocoGrid) value).setBorder(selectedBorder);
               } else {
                    if (unselectedBorder == null)
                         unselectedBorder = BorderFactory.createMatteBorder(2,2,2,2, table.getBackground());
                    ((BlocoGrid) value).setBorder(unselectedBorder);
          return (Component) value;
}and this is my custom editor (so clicks can get passed on):
public class TimeTableEditor extends AbstractCellEditor implements TableCellEditor {
     private TimeTableRenderer render = null;
     public TimeTableEditor() {
          render = new TimeTableRenderer();
    public Component getTableCellEditorComponent(JTable table, Object value,
            boolean isSelected, int row, int column) {
         if (value instanceof BlocoGrid) {
              if (((BlocoGrid) value).barras.size() > 0) {
                   return render.getTableCellRendererComponent(table, value, isSelected, true, row, column);
         return null;
    public Object getCellEditorValue() {
        return null;
}As you can see, both the renderer and editor return the same component that cames from the JTable model (all table values (components) only get instantiated once, so the same component is passed on to the renderer and editor).
Is this the most correct way to get clicks to the cell component?
Please check the screenshot below to see how the JButtons get placed inside the cell:
http://img141.imageshack.us/my.php?image=calendarxo9.jpg
If you need more info, please say so.
Thanks.

My mistake... It worked fine. The cell span code was malfunctioning. Thanks anyway.

Edit a JTable cell, click save button, value isn't stored in JTable

I'm editing a JTable cell, just using default editor provided by JTable
I click a save button elsewhere in my GUI
The value typed into the cell so far isn't stored in the TableModel yet and so doesn't get saved.
How can I make sure the value gets stored in the JTable in the above scenario when the JButton is pressed but before saving.
Preferably I'd like the code with the JButton not to have to know about the JTable at all.
Cheers,
D

I the forums 100s of times.Many thanks. If they had a decent search on this forum I might have found it as I did try.
Come to think of it - Sun have completely fcukd up this forum.

Clicking in a cell in a JTable that autoscrolls horz

I have a JTable inside of a JScollPane. The JTable is wider than the JScrollPane so the scroll bar becomes enabled. If I have a column that is paritally obstructed and a I click in a cel in the column the scroll panel scrolls horizontally in an attemp to make the entire cell visible. Is there a way to stop the auto scrolling without making the table disabled?
Thanks
Chris

try with this.
table.setAutoscrolls(false);

JTable JCombox popup on click in table cell

What is the recommended way of making a JComboBox that is in a JTable cell popup when the user clicks once anywhere in the cell?
The popup is actually a calendar that works fine if the user clicks on the spot where the button shows up in the cell but sets the focus in the text box of the JComboBox is the click is anywhere else in the cell and the popup doesn't sho in that case. To get to the popup requires a click on the button.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Test extends JFrame {
public Test() {
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container content = getContentPane();
    String[] head = {"One","Two","Three"};
    String[][] data = {{"R1-C1","R1-C2","R1-C3"},
                       {"R2-C1","R2-C2","R2-C3"},
                       {"R3-C1","R3-C2","R3-C3"}};
    JTable jt = new JTable(data, head);
    content.add(new JScrollPane(jt), BorderLayout.CENTER);
    JComboBox jcb = new JComboBox(head);
    jcb.addFocusListener(new FocusAdapter() {
      public void focusGained(FocusEvent fe) {
        ((JComboBox)fe.getSource()).showPopup();
    jt.getColumnModel().getColumn(1).setCellEditor(new DefaultCellEditor(jcb));
    setSize(200, 200);
    setVisible(true);
public static void main(String[] args) { new Test(); }
}

Needs double click to edit cell in JTable

I know this is bad design but there's no other way that I could possibly meet the requirement which is to have dynamic components. Anyhow, the requirement is to have any kind of components(e.g. TextFields, Combobox, Regular expression fields, a panel with a number of checkboxes) in a table cell in the same column. It would have been easier to do this by using the the DefaultCellEditor, with the 'panel containing a number of checkboxes' I cannot use it.
I already have an implementation for this requirement. There was no problem with it when we used Java 1.5. But when we shifted to Java 1.6, I noticed that I need to double-click on a cell so that I can edit it. I did not notice this behavior at all with 1.5. What could have changed in 1.6?
Below, are my (trimmed-down) codes:
//TestComponent.java
public class TestComponent extends JPanel{
private int componentHeight=16;
public TestComponent(int i){
this.setPreferredSize(new Dimension(90, this.componentHeight));
setLayout(new BoxLayout(this, BoxLayout.X_AXIS));
switch (i){
case 0: createTextField(); break;
case 1: createCheckBox(); break;
case 2: createCombo(); break;
private void createTextField(){
String text = null;
int textFieldMaxLength = 5;
JTextField oText = new JTextField(textFieldMaxLength);
// add it to this Panel:
this.add(oText);
// set the data:
text = "test";
oText.setText(text);
// set size for this TextField:
Dimension fieldSize = new Dimension(
textFieldMaxLength * 13, this.componentHeight);
          oText.setPreferredSize(fieldSize);
          oText.setMinimumSize(fieldSize);
          oText.setMaximumSize(fieldSize);
private void createCheckBox(){
JCheckBox chkbox = new JCheckBox();
this.add(chkbox);
private void createCombo(){
JComboBox combo = new JComboBox(new String[]{"apple", "orange", "plum", "grapefruit"});
Dimension fieldSize = new Dimension(                    5 * 13, this.componentHeight);
          combo.setPreferredSize(fieldSize);
          combo.setMinimumSize(fieldSize);
          combo.setMaximumSize(fieldSize);
this.add(combo);
//ComponentCellEditor.java
public class ComponentCellEditor extends AbstractCellEditor
     implements TableCellEditor, Serializable{
protected JComponent editorComponent = null;
public Component getComponent() {
return editorComponent;
public Object getCellEditorValue() {
return editorComponent;
public boolean isCellEditable(EventObject anEvent) {
return true;
public boolean shouldSelectCell(EventObject anEvent) {
return true;
public boolean stopCellEditing() {
fireEditingStopped();
return true;
// Implementing the TreeCellEditor Interface
public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
this.editorComponent = (TestComponent)value;
return editorComponent;
//ComponentCellRenderer.java
public class ComponentCellRenderer implements TableCellRenderer
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
TestComponent oComp = (TestComponent) value;
if (isSelected) {
oComp.setForeground(table.getSelectionForeground());
oComp.setBackground(table.getSelectionBackground());
} else {
oComp.setForeground(table.getForeground());
oComp.setBackground(table.getBackground());
return oComp;
//TestTable.java
public class TestTable
public static void main(String []args){
String columns[] = {"Text", "Value"};
Class types[] = {String.class, TestComponent.class};
boolean editable[] = {false, true};
AsrTable table = new AsrTable(new Dimension(200, 150), columns, types, editable);
table.addRow(new Object[]{"Field1", new TestComponent(0)});
table.addRow(new Object[]{"Field2", new TestComponent(1)});
table.addRow(new Object[]{"Field3", new TestComponent(2)});
table.setDefaultEditor(TestComponent.class, new ComponentCellEditor());
table.setDefaultRenderer(TestComponent.class, new ComponentCellRenderer());
table.setShowGrid(false);
table.setRowHeight(20);
table.setRowSelectionAllowed(false);
JFrame frame = new JFrame();
frame.addWindowListener( new WindowAdapter() {
     public void windowClosing(WindowEvent e)
     Window win = e.getWindow();
     win.setVisible(false);
     win.dispose();
     System.exit(0);
JScrollPane pane = new JScrollPane(table);
frame.getContentPane().add(pane);
frame.pack();
frame.setVisible(true);
}

My last post doesn't have Code Formatting.
// TestComponent.java
public class TestComponent extends JPanel{
     private int componentHeight=16;
     public TestComponent(int i){
          this.setPreferredSize(new Dimension(90, this.componentHeight));
          setLayout(new BoxLayout(this, BoxLayout.X_AXIS));
          switch (i){
               case 0: createTextField(); break;
               case 1: createCheckBox(); break;
          case 2: createCombo(); break;
     private void createTextField(){
          String text = null;
          int textFieldMaxLength = 5;
          JTextField oText = new JTextField(textFieldMaxLength);
          // add it to this Panel:
          this.add(oText);
          // set the data:
          text = "test";
          oText.setText(text);
          // set size for this TextField:
          Dimension fieldSize = new Dimension(
                    textFieldMaxLength * 13, this.componentHeight);
          oText.setPreferredSize(fieldSize);
          oText.setMinimumSize(fieldSize);
          oText.setMaximumSize(fieldSize);
     private void createCheckBox(){
          JCheckBox chkbox = new JCheckBox();
          this.add(chkbox);
     private void createCombo(){
          JComboBox combo = new JComboBox(new String[]{"apple", "orange", "plum", "grapefruit"});
          Dimension fieldSize = new Dimension( 5 * 13, this.componentHeight);
          combo.setPreferredSize(fieldSize);
          combo.setMinimumSize(fieldSize);
          combo.setMaximumSize(fieldSize);
          this.add(combo);
// ComponentCellEditor.java
public class ComponentCellEditor extends AbstractCellEditor
     implements TableCellEditor, Serializable
     protected JComponent editorComponent = null;
     public Component getComponent() {
          return editorComponent;
     public Object getCellEditorValue() {
          return editorComponent;
     public boolean isCellEditable(EventObject anEvent) {
          return true;
     public boolean shouldSelectCell(EventObject anEvent) {
          return true;
     public boolean stopCellEditing() {
          fireEditingStopped();
          return true;
// Implementing the TreeCellEditor Interface
    public Component getTableCellEditorComponent(JTable table, Object value,
          boolean isSelected, int row, int column) {
          this.editorComponent = (TestComponent)value;
          return editorComponent;
// ComponentCellRenderer.java
public class ComponentCellRenderer implements TableCellRenderer
     public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row,
               int column) {
          TestComponent oComp = (TestComponent) value;
          if (isSelected) {
               oComp.setForeground(table.getSelectionForeground());
               oComp.setBackground(table.getSelectionBackground());
          } else {
               oComp.setForeground(table.getForeground());
               oComp.setBackground(table.getBackground());
          return oComp;
// TestTable.java
public class TestTable
     public static void main(String []args){
          String columns[] = {"Text", "Value"};
          Class types[] = {String.class, TestComponent.class};
          boolean editable[] = {false, true};
          AsrTable table = new AsrTable(new Dimension(200, 150), columns, types, editable);
          table.addRow(new Object[]{"Field1", new TestComponent(0)});
          table.addRow(new Object[]{"Field2", new TestComponent(1)});
          table.addRow(new Object[]{"Field3", new TestComponent(2)});
          table.setDefaultEditor(TestComponent.class, new ComponentCellEditor());
          table.setDefaultRenderer(TestComponent.class, new ComponentCellRenderer());
          table.setShowGrid(false);
          table.setRowHeight(20);
          table.setRowSelectionAllowed(false);
          JFrame frame = new JFrame();
          frame.addWindowListener( new WindowAdapter() {
               public void windowClosing(WindowEvent e)
                    Window win = e.getWindow();
                    win.setVisible(false);
                    win.dispose();
                    System.exit(0);
          JScrollPane pane = new JScrollPane(table);
          frame.getContentPane().add(pane);
          frame.pack();
          frame.setVisible(true);
}

Edit a JTable cell by clicking at it once - is it possible?

If I want to edit a cell in a JTable, I have to doubleclick on it. Is it possible to set the JTable cells to be in edit mode by just clicking at the cells once?

Did you search the forums?? How about something like "jtable-edit-single-click".

Must double click JTable cell to edit - Why?

Hi there,
I have a custom JTable model, which overrides the isCellEditable method and returns true for the first column. All nice, only that column now gets editable - but why do I have to double click in the cell to be able to edit in it? I've seen swing gui's where the cell gets editable on single click/focus...
Very thankful for any help in resolving this!
Best regard,
AC

Add a mouselistener to your table and in the mousePressed() method set the editing cell:
table.editCellAt(row, column);
table.setEditingRow(row);
table.setEditingColumn(column);
table.repaint();

JTable Cell grays out when I click the cell below (JList editor & renderer)

Click on any cell, then click on the cell immediately below.. and the first cell u clicked on goes gray... After repaints and stuff, it stills stays gray
* TimetableCellGui.java
* Created on April 12, 2007, 7:21 PM
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
package timetable.gui;
import java.awt.Color;
import java.awt.Component;
import java.awt.Font;
import java.util.ArrayList;
import java.util.EventObject;
import javax.swing.DefaultListModel;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.event.CellEditorListener;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
* @author jay
public class TimetableCellGui extends JList implements TableCellRenderer, TableCellEditor {
     * Creates a new instance of TimetableCellGui
    public TimetableCellGui() {
        this.setFont(new Font("Nice",Font.PLAIN,10));
        this.setForeground(new Color(150,150,250));
    private static String courseFilter = "";
    private static String roomFilter = "";
    private static boolean filterCourse = false;
    private static boolean filterRoom = false;
    public static String getCourseFilter() {
        return courseFilter;
    public static String getRoomFilter() {
        return roomFilter;
    public static boolean isFilterCourse() {
        return filterCourse;
    public static boolean isFilterRoom() {
        return filterRoom;
    public static void setCourseFilter(String c) {
        courseFilter = c;
    public static void setFilterCourse(boolean f) {
        filterCourse = f;
    public static void setFilterRoom(boolean filter) {
        filterRoom = filter;
    public static void setRoomFilter(String r) {
        roomFilter = r;
    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
        if(value == null) {
            return null;
        } else {
            DefaultListModel model = new DefaultListModel();
            String addition = "some addition";
         model.add(addition);
            model.add(addition);
            this.setModel(model);
            return new JScrollPane(this);
    public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
        if(value == null) {
            return null;
        } else {
            DefaultListModel model = new DefaultListModel();
            String addition = "some addition";
         model.add(addition);
            this.setModel(model);
            return new JScrollPane(this);
    public Object getCellEditorValue() {
        return "helllo";
    public boolean isCellEditable(EventObject anEvent) {
        return true;
    public boolean shouldSelectCell(EventObject anEvent) {
        return true;
    public boolean stopCellEditing() {
        return true;
    public void cancelCellEditing() {
        super.clearSelection();
    public void addCellEditorListener(CellEditorListener l) {
    public void removeCellEditorListener(CellEditorListener l) {
}

I'm doing up a timetable. And so far, I've found that is the best way to display it. However if you can think of a better way, I'm willing to listen, but if u havn't gotten a better suggestion... Plz try and help me tweak this one to work... Because I've done quite a bit of work on this one so far

How to detect if user clicks on another cell in a JTable while editing?

I use a custom TableModel which extends AbstractTableModel and I serialize the TableModel to save the data in a file. Sometimes when I try to serialize, my program crashes after putting in random data in to the table. I have reduced the problem down to if a user is editing a field and clicks on another cell instead of hitting "enter", then then program will crash if that was the last action when trying to save.
I am thinking it might be something with the custom TableModel class, like I am missing a method or something. I have getColumnName, getColumnCount, getValueAt, setValueAt, isCellEditable
Thanks

Clicking on another cell should not cause a problem as this will stop editing in the previous cell. However if you click on your save button directly then the editor is still being used. Use the following after creating your table:
table.putClientProperty("terminateEditOnFocusLost", Boolean.TRUE);

How do I get Integer in JTable cell to be selected when edit using keyboard

I have some cells in a JTable, when I double-click on the cell to edit it the current value (if any) is selected and is replaced by any value I enter, which is the behaviour I want. But when I use the keyboard to navigate to the cell and start editing, new values are added to the end of the current value which is not what I want.
I have created my own IntegerCellEditor (see below) and added a focus event or the textfield used when editing to select all the current text but it has no effect, any ideas please ?
public class IntegerCellEditor extends DefaultCellEditor
    public IntegerCellEditor( JTextField textfield )
        super( textfield );
        //Ensure old value is always selected, when start editing
        ((JTextField)getComponent()).addFocusListener(new FocusAdapter()
                public void focusGained(FocusEvent fe){
                    ((JTextField)getComponent()).selectAll();
        ((JTextField)getComponent()).setHorizontalAlignment(JTextField.RIGHT);
     * Return as Integer (because delegate converts values to Strings).
    public Object getCellEditorValue()
        return Integer.valueOf((String)delegate.getCellEditorValue());
}

But when I use the keyboard to navigate to the cell and start editing,
new values are added to the end of the current value which is not what I want.How does the use know that typing will replace the text and not append? Usually if text is to be deleted, it is highlighted to give the user a visual cue.
Here is a renderer that does this, in case your interested:
http://forum.java.sun.com/thread.jspa?forumID=57&threadID=752727

Problem in event handling of combo box in JTable cell

Hi,
I have a combo box as an editor for a column cells in JTable. I have a event listener for this combo box. When ever I click on the JTable cell whose editor is combo box,
I get the following exception,
Exception occurred during event dispatching:
java.lang.NullPointerException
     at javax.swing.plaf.basic.BasicTableUI$MouseInputHandler.setDispatchComponent(Unknown Source)
     at javax.swing.plaf.basic.BasicTableUI$MouseInputHandler.mousePressed(Unknown Source)
     at java.awt.AWTEventMulticaster.mousePressed(Unknown Source)
     at java.awt.Component.processMouseEvent(Unknown Source)
     at java.awt.Component.processEvent(Unknown Source)
     at java.awt.Container.processEvent(Unknown Source)
     at java.awt.Component.dispatchEventImpl(Unknown Source)
     at java.awt.Container.dispatchEventImpl(Unknown Source)
     at java.awt.Component.dispatchEvent(Unknown Source)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
     at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
     at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
     at java.awt.Container.dispatchEventImpl(Unknown Source)
     at java.awt.Component.dispatchEvent(Unknown Source)
     at java.awt.EventQueue.dispatchEvent(Unknown Source)
     at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
     at java.awt.EventDispatchThread.run(Unknown Source)
Can any one tell me how to over come this problem.
Thanks,
Raghu

Here's an example of the model I used in my JTable. I've placed 2 comboBoxes with no problems.
Hope this helps.
public class FileModel5 extends AbstractTableModel
public boolean isEditable = false;
protected static int NUM_COLUMNS = 3;
// initialize number of rows to start out with ...
protected static int START_NUM_ROWS = 0;
protected int nextEmptyRow = 0;
protected int numRows = 0;
static final public String file = "File";
static final public String mailName = "Mail Id";
static final public String postName = "Post Office Id";
static final public String columnNames[] = {"File", "Mail Id", "Post Office Id"};
// List of data
protected Vector data = null;
public FileModel5()
data = new Vector();
public boolean isCellEditable(int rowIndex, int columnIndex)
// The 2nd & 3rd column or Value field is editable
if(isEditable)
if(columnIndex > 0)
return true;
return false;
* JTable uses this method to determine the default renderer/
* editor for each cell. If we didn't implement this method,
* then the last column would contain text ("true"/"false"),
* rather than a check box.
public Class getColumnClass(int c)
return getValueAt(0, c).getClass();
* Retrieves number of columns
public synchronized int getColumnCount()
return NUM_COLUMNS;
* Get a column name
public String getColumnName(int col)
return columnNames[col];
* Retrieves number of records
public synchronized int getRowCount()
if (numRows < START_NUM_ROWS)
return START_NUM_ROWS;
else
return numRows;
* Returns cell information of a record at location row,column
public synchronized Object getValueAt(int row, int column)
try
FileRecord5 p = (FileRecord5)data.elementAt(row);
switch (column)
case 0:
return (String)p.file;
case 1:
return (String)p.mailName;
case 2:
return (String)p.postName;
catch (Exception e)
return "";
public void setValueAt(Object aValue, int row, int column)
FileRecord5 arow = (FileRecord5)data.elementAt(row);
arow.setElementAt((String)aValue, column);
fireTableCellUpdated(row, column);
* Returns information of an entire record at location row
public synchronized FileRecord5 getRecordAt(int row) throws Exception
try
return (FileRecord5)data.elementAt(row);
catch (Exception e)
throw new Exception("Record not found");
* Used to add or update a record
* @param tableRecord
public synchronized void updateRecord(FileRecord5 tableRecord)
String file = tableRecord.file;
FileRecord5 p = null;
int index = -1;
boolean found = false;
boolean addedRow = false;
int i = 0;
while (!found && (i < nextEmptyRow))
p = (FileRecord5)data.elementAt(i);
if (p.file.equals(file))
found = true;
index = i;
} else
i++;
if (found)
{ //update
data.setElementAt(tableRecord, index);
else
if (numRows <= nextEmptyRow)
//add a row
numRows++;
addedRow = true;
index = nextEmptyRow;
data.addElement(tableRecord);
//Notify listeners that the data changed.
if (addedRow)
nextEmptyRow++;
fireTableRowsInserted(index, index);
else
fireTableRowsUpdated(index, index);
* Used to delete a record
public synchronized void deleteRecord(String file)
FileRecord5 p = null;
int index = -1;
boolean found = false;
int i = 0;
while (!found && (i < nextEmptyRow))
p = (FileRecord5)data.elementAt(i);
if (p.file.equals(file))
found = true;
index = i;
} else
i++;
if (found)
data.removeElementAt(i);
nextEmptyRow--;
numRows--;
fireTableRowsDeleted(START_NUM_ROWS, numRows);
* Clears all records
public synchronized void clear()
int oldNumRows = numRows;
numRows = START_NUM_ROWS;
data.removeAllElements();
nextEmptyRow = 0;
if (oldNumRows > START_NUM_ROWS)
fireTableRowsDeleted(START_NUM_ROWS, oldNumRows - 1);
fireTableRowsUpdated(0, START_NUM_ROWS - 1);
* Loads the values into the combo box within the table for mail id
public void setUpMailColumn(JTable mapTable, ArrayList mailList)
TableColumn col = mapTable.getColumnModel().getColumn(1);
javax.swing.JComboBox comboMail = new javax.swing.JComboBox();
int s = mailList.size();
for(int i=0; i<s; i++)
comboMail.addItem(mailList.get(i));
col.setCellEditor(new DefaultCellEditor(comboMail));
//Set up tool tips.
DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
renderer.setToolTipText("Click for mail Id list");
col.setCellRenderer(renderer);
//Set up tool tip for the mailName column header.
TableCellRenderer headerRenderer = col.getHeaderRenderer();
if (headerRenderer instanceof DefaultTableCellRenderer)
((DefaultTableCellRenderer)headerRenderer).setToolTipText(
"Click the Mail Id to see a list of choices");
* Loads the values into the combo box within the table for post office id
public void setUpPostColumn(JTable mapTable, ArrayList postList)
TableColumn col = mapTable.getColumnModel().getColumn(2);
javax.swing.JComboBox combo = new javax.swing.JComboBox();
int s = postList.size();
for(int i=0; i<s; i++)
combo.addItem(postList.get(i));
col.setCellEditor(new DefaultCellEditor(combo));
//Set up tool tips.
DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
renderer.setToolTipText("Click for post office Id list");
col.setCellRenderer(renderer);
//Set up tool tip for the mailName column header.
TableCellRenderer headerRenderer = col.getHeaderRenderer();
if (headerRenderer instanceof DefaultTableCellRenderer)
((DefaultTableCellRenderer)headerRenderer).setToolTipText(
"Click the Post Office Id to see a list of choices");
}

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