Using Editor JComboBox is JTable CellEditors
Hello all.
I have a JTable with an editable JComboBox as a cell editor, but when it is activated the text inside the edit area is cut off.
Example: http://www.rightstep.org/Image.jpg
What can I do with the JComboBox settings to make more of the text visible? If some of it is cut off, that is not a huge issue -- but I'd like as much visible as possible for when people need to enter text that is not already in the drop down box.
Thanks for any help!
A combo box has an associated editor which in turn has an associated textfield.... get the textfield and set a null or empty border on it.
;o)
V.V.
Similar Messages
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Bug when using JComboBox as JTable CellEditor
Hello! I have a JTable that displays database information, and one of the columns is editable using a JComboBox. When the user selects an item from the JComboBox, the database (and consequently the JTable) is updated with the new value.
Everything works fine except for a serious and subtle bug. To explain what happens, here is an example. If Row 1 has the value "ABC" and the user selects the editable column on that row, the JComboBox drops down with the existing value "ABC" already selected (this is the default behavior, not something I implemented). Now, if the user does not select a new value from the JComboBox, and instead selects the editable column on Row 2 that contains "XYZ", Row 1 gets updated to contain "XYZ"!
The reason that is happening is because I'm updating the database by responding to the ActionListener.actionPerformed event in the JComboBox, and when a new row is selected, the actionPerformed event gets fired BEFORE the JTable's selected row index gets updated. So the old row gets updated with the new row's information, even though the user never actually selected a new item in the JComboBox.
If I use ItemListener.itemStateChanged instead, I get the same results. If I use MouseListener.mousePressed/Released I get no events at all for the JComboBox list selection. If anyone else has encountered this problem and found a workaround, I would very much appreciate knowing what you did. Here are the relavent code snippets:
// In the dialog containing JTable:
JComboBox cboRouteType = new JComboBox(new String[]{"ABC", "XYZ"));
cboRouteType.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ev) {
doCboRouteTypeSelect((String)cboRouteType.getSelectedItem());
private void doCboRouteTypeSelect(String selItem) {
final RouteEntry selRoute = tblRoutes.getSelectedRoute();
if (selRoute == null) { return; }
RouteType newType = RouteType.fromString(selItem);
// Only update the database if the value was actually changed.
if (selRoute.getRouteType() == newType) { return; }
RouteType oldType = selRoute.getRouteType();
selRoute.setRouteType(newType);
// (update the db below)
// In the JTable:
public RouteEntry getSelectedRoute() {
int selIndx = getSelectedRow();
if (selIndx < 0) return null;
return model.getRouteAt(selIndx);
// In the TableModel:
private Vector<RouteEntry> vRoutes = new Vector<RouteEntry>();
public RouteEntry getRouteAt(int indx) { return vRoutes.get(indx); }Update: I was able to resolve this issue. In case anyone is curious, the problem was caused by using the actionPerformed method in the first place. Apparently when the JComboBox is used as a table cell editor, it calls setValueAt on my table model and that's where I'm supposed to respond to the selection.
Obviously the table itself shouldn't be responsible for database updates, so I had to create a CellEditListener interface and implement it from the class that actually does the DB update in a thread and is capable of reporting SQL exceptions to the user. All that work just to let the user update the table/database with a dropdown. Sheesh! -
Problem using an editable JComboBox as JTable cell editor
Hi,
i have a problem using an editable JComboBox as cell editor in a JTable.
When i edit the combo and then I press the TAB or ENTER key then all works fine and the value in the TableModel is updated with the edited one, but if i leave the cell with the mouse then the value is not passed to the TableModel. Why ? Is there a way to solve this problem ?
Regards
sergio setteif (v1.4) [url
http://java.sun.com/j2se/1.4.2/docs/api/javax/swing/JTa
le.html#setSurrendersFocusOnKeystroke(boolean)]go
hereelse [url
http://forum.java.sun.com/thread.jsp?forum=57&thread=43
440]go here
Thank you. I've also found this one (the first reply): http://forum.java.sun.com/thread.jsp?forum=57&thread=124361 Works fine for me.
Regards
sergio sette -
AutoComplete JComboBox As JTable cell editor
Hello, when I try to use AutoComplete JComboBox as my JTable cell editor, I facing the following problem
1) Exception thrown when show pop up. - Exception in thread "AWT-EventQueue-0" java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
2) Unable to capture enter key event.
Here is my complete working code. With the same JComboBox class, I face no problem in adding it at JFrame. But when using it as JTable cell editor, I will have the mentioned problem.
Any advice? Thanks
import javax.swing.*;
import javax.swing.JTable.*;
import javax.swing.table.*;
import java.awt.event.*;
* @author yccheok
public class NewJFrame extends javax.swing.JFrame {
/** Creates new form NewJFrame */
public NewJFrame() {
initComponents();
/* Combo Box Added In JFrame. Work as expected. */
final JComboBox comboBox = new JComboBox();
comboBox.addItem("Snowboarding");
comboBox.addItem("Rowing");
comboBox.addItem("Chasing toddlers");
comboBox.setEditable(true);
comboBox.getEditor().getEditorComponent().addKeyListener(new KeyAdapter() {
public void keyReleased(KeyEvent e) {
if(e.getKeyCode() == KeyEvent.VK_ENTER) {
System.out.println("is enter");
return;
System.out.println("typed");
comboBox.setSelectedIndex(0);
comboBox.showPopup();
getContentPane().add(comboBox, java.awt.BorderLayout.SOUTH);
public JTable getMyTable() {
return new JTable() {
Combo Box Added In JTable as cell editor. Didn't work as expected:
1. Exception thrown when show pop up.
2. Unable to capture enter key event.
public TableCellEditor getCellEditor(int row, int column) {
final JComboBox comboBox = new JComboBox();
comboBox.addItem("Snowboarding");
comboBox.addItem("Rowing");
comboBox.addItem("Chasing toddlers");
comboBox.setEditable(true);
comboBox.getEditor().getEditorComponent().addKeyListener(new KeyAdapter() {
public void keyReleased(KeyEvent e) {
if(e.getKeyCode() == KeyEvent.VK_ENTER) {
System.out.println("is enter");
return;
System.out.println("typed");
comboBox.setSelectedIndex(0);
comboBox.showPopup();
return new DefaultCellEditor(comboBox);
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
// <editor-fold defaultstate="collapsed" desc=" Generated Code ">
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
jTable1 = getMyTable();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jTable1.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
{null, null, null, null},
{null, null, null, null},
{null, null, null, null},
{null, null, null, null}
new String [] {
"Title 1", "Title 2", "Title 3", "Title 4"
jScrollPane1.setViewportView(jTable1);
getContentPane().add(jScrollPane1, java.awt.BorderLayout.CENTER);
pack();
}// </editor-fold>
* @param args the command line arguments
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new NewJFrame().setVisible(true);
// Variables declaration - do not modify
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTable jTable1;
// End of variables declaration
}You need to create a custom CellEditor which will prevent these problems from occurring. The explanation behind the problem and source code for the new editor can be found at Thomas Bierhance's site http://www.orbital-computer.de/JComboBox/. The description of the problem and the workaround are at the bottom of the page.
-
Using KeyMap in Editable JComboBoxes and JTable
I am using Keymapping for JTextFields. It works fine ! I am interested in extending the keymap feature to JComboBoxes and JTable.
if you want to do the keymapping inside the editable component of the combobox or the table, make sure you apply it on the editor component.e.g. comboBox.getEditor().getEditorComponent() and table.getCellEditor().getTableCellEditorComponent().
-
Event Handler for a JComboBox in JTable
Hi,
I am using a JTable with one column having JComboBox as CellEditor, I Want to handle event for jcomboBox such that if I am selecting any item from JcomboBox item , i check if there is any field before that in the Jtable Cell if yes then I am setting it to null or the previous value. I have implemented CellEditorListener to it but it is not working fine, so if anyone can please help me out..If I read you right, you want to use a multiple keystroke combo box as an editor in a JTable?
If you create the JComboBox as you would like it and then install it as an editor in the column(s) JTable the editor will work like the JComboBox
Example:
//- you would have that keyselection Manager class
// This key selection manager will handle selections based on multiple keys.
class MyKeySelectionManager implements JComboBox.KeySelectionManager { .... };
//- Create the JComboBox with the multiple keystroke ability
//- Create a read-only combobox
String[] items = {"Ant", "Ape", "Bat", "Boa", "Cat", "Cow"};
JComboBox cboBox = new JComboBox(items);
// Install the custom key selection manager
cboBox.setKeySelectionManager(new MyKeySelectionManager());
//- combo box editor for the JTable
DefaultCellEditor cboBoxCellEditor = new DefaultCellEditor(cboBox);
//- set the editor to the specified COlumn in the JTable - for example the first column (0)
tcm.getColumn(0).setCellEditor(cboBoxCellEditor); Finally, it may be necessary to to put a KeyPressed listener for the Tab key, and if you enter the column that has the JComboBox:
1) start the editting
table.editCellAt(row, col);2) get the editor component and cast it into a JComboBox (in this case)
Component comp = table.getEditorComponent();
JComboBox cboComp = (JComboBox) comp;3) give this compent the foucus to do its deed
cboComp.requestFocus();Hope this helps!
dd -
Multiple keystrokes selection for a JComboBox in JTable
Has anyone used multiple keystrokes selection in a JComboBox inside JTable before? I can get it done outside JTable by using: http://javaalmanac.com/egs/javax.swing/combobox_CbMultiKey.html
Looks like JTable has all kinds of problems to support JComboBox.
Suggestions?
Thanks,
JamesIf I read you right, you want to use a multiple keystroke combo box as an editor in a JTable?
If you create the JComboBox as you would like it and then install it as an editor in the column(s) JTable the editor will work like the JComboBox
Example:
//- you would have that keyselection Manager class
// This key selection manager will handle selections based on multiple keys.
class MyKeySelectionManager implements JComboBox.KeySelectionManager { .... };
//- Create the JComboBox with the multiple keystroke ability
//- Create a read-only combobox
String[] items = {"Ant", "Ape", "Bat", "Boa", "Cat", "Cow"};
JComboBox cboBox = new JComboBox(items);
// Install the custom key selection manager
cboBox.setKeySelectionManager(new MyKeySelectionManager());
//- combo box editor for the JTable
DefaultCellEditor cboBoxCellEditor = new DefaultCellEditor(cboBox);
//- set the editor to the specified COlumn in the JTable - for example the first column (0)
tcm.getColumn(0).setCellEditor(cboBoxCellEditor); Finally, it may be necessary to to put a KeyPressed listener for the Tab key, and if you enter the column that has the JComboBox:
1) start the editting
table.editCellAt(row, col);2) get the editor component and cast it into a JComboBox (in this case)
Component comp = table.getEditorComponent();
JComboBox cboComp = (JComboBox) comp;3) give this compent the foucus to do its deed
cboComp.requestFocus();Hope this helps!
dd -
Question for BasicComboBoxEditor use in JComboBox How can I get right ce
I use a JComboBox as the editor for JTable.Now I met a problem In use object that BasicComboBoxEditor as the editor for JComboBox that in JTable.
I can't get the cell data rightly.I can't get the editing row and column when system call getEditorComponent() . Mouse event process is after getEditorComponent().
How can I get right cell data when then getEditorComponent calling?Sorry,I am english is poor.
I use a component of JComboBox as editor of JTable. then
I want to konw that how can I get right data in a cell of JTable when table enter editing -
Editable JComboBox in JTable focus issue
Please look at the sample code below.
I am using a JComboBox as the editor for a column in the table. When a cell in that column is edited and the user presses enter, the cell is no longer in edit mode. However, the focus is now set on the next component in the scrollpane (which is a textfield).
If I don't add the textfield and the the table is the only component in the scroll pane, then focus correctly remains on the selected cell.
When the user exits edit mode, I'd like the table to have focus and for the cell to remain selected. How can I achieve this?
thanks,
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
import java.util.Calendar;
import java.util.GregorianCalendar;
import javax.swing.plaf.basic.*;
import java.awt.Component;
import javax.swing.JComboBox;
import java.util.EventObject;
import java.awt.event.*;
import javax.swing.event.*;
public class TableComboBoxTest extends JFrame {
protected JTable table;
public TableComboBoxTest() {
Container pane = getContentPane();
pane.setLayout(new BorderLayout());
MyTableModel model = new MyTableModel();
table = new JTable(model);
table.putClientProperty("terminateEditOnFocusLost", Boolean.TRUE);
table.setSurrendersFocusOnKeystroke(true);
TableColumnModel tcm = table.getColumnModel();
TableColumn tc = tcm.getColumn(MyTableModel.GENDER);
tc.setCellEditor(new MyGenderEditor(new JComboBox()));
tc.setCellRenderer(new MyGenderRenderer());
JScrollPane jsp = new JScrollPane(table);
pane.add(jsp, BorderLayout.CENTER);
pane.add(new JTextField("focus goes here"), BorderLayout.SOUTH);
public static void main(String[] args) {
TableComboBoxTest frame = new TableComboBoxTest();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(500, 300);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
public class MyTableModel extends AbstractTableModel {
public final static int FIRST_NAME = 0;
public final static int LAST_NAME = 1;
public final static int DATE_OF_BIRTH = 2;
public final static int ACCOUNT_BALANCE = 3;
public final static int GENDER = 4;
public final static boolean GENDER_MALE = true;
public final static boolean GENDER_FEMALE = false;
public final String[] columnNames = {
"First Name", "Last Name", "Date of Birth", "Account Balance", "Gender"
public Object[][] values = {
"Clay", "Ashworth",
new GregorianCalendar(1962, Calendar.FEBRUARY, 20).getTime(),
new Float(12345.67), "three"
"Jacob", "Ashworth",
new GregorianCalendar(1987, Calendar.JANUARY, 6).getTime(),
new Float(23456.78), "three1"
"Jordan", "Ashworth",
new GregorianCalendar(1989, Calendar.AUGUST, 31).getTime(),
new Float(34567.89), "three2"
"Evelyn", "Kirk",
new GregorianCalendar(1945, Calendar.JANUARY, 16).getTime(),
new Float(-456.70), "One"
"Belle", "Spyres",
new GregorianCalendar(1907, Calendar.AUGUST, 2).getTime(),
new Float(567.00), "two"
public int getRowCount() {
return values.length;
public int getColumnCount() {
return values[0].length;
public Object getValueAt(int row, int column) {
return values[row][column];
public void setValueAt(Object aValue, int r, int c) {
values[r][c] = aValue;
public String getColumnName(int column) {
return columnNames[column];
public boolean isCellEditable(int r, int c) {
return c == GENDER;
public class MyComboUI extends BasicComboBoxUI {
public JList getList()
return listBox;
public class MyGenderRenderer extends DefaultTableCellRenderer{
public MyGenderRenderer() {
super();
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
boolean hasFocus, int row, int column) {
JComboBox box = new JComboBox();
box.addItem(value);
return box;
public class MyGenderEditor extends DefaultCellEditor { // implements CaretListener {
protected EventListenerList listenerList = new EventListenerList();
protected ChangeEvent changeEvent = new ChangeEvent(this);
private JTextField comboBoxEditorTField;
Object newValue;
JComboBox _cbox;
public MyGenderEditor(JComboBox cbox) {
super(cbox);
_cbox = cbox;
comboBoxEditorTField = (JTextField)_cbox.getEditor().getEditorComponent();
_cbox.addItem("three");
_cbox.addItem("three1");
_cbox.addItem("three2");
_cbox.addItem("One");
_cbox.addItem("two");
_cbox.setEditable(true);
_cbox.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
System.out.println("\nactionPerformed ");
fireEditingStopped();
public void addCellEditorListener(CellEditorListener listener) {
listenerList.add(CellEditorListener.class, listener);
public void removeCellEditorListener(CellEditorListener listener) {
listenerList.remove(CellEditorListener.class, listener);
protected void fireEditingStopped() {
System.out.println("fireEditingStopped called ");
CellEditorListener listener;
Object[] listeners = listenerList.getListenerList();
for (int i = 0; i < listeners.length; i++) {
if (listeners[i] instanceof CellEditorListener) {
System.out.println("calling editingStopped on listener....................");
listener = (CellEditorListener) listeners;
listener.editingStopped(changeEvent);
protected void fireEditingCanceled() {
System.out.println("fireEditingCanceled called ");
CellEditorListener listener;
Object[] listeners = listenerList.getListenerList();
for (int i = 0; i < listeners.length; i++) {
if (listeners[i] instanceof CellEditorListener) {
listener = (CellEditorListener) listeners[i];
listener.editingCanceled(changeEvent);
public void cancelCellEditing() {
System.out.println("cancelCellEditing called ");
fireEditingCanceled();
public void addNewItemToComboBox() {
System.out.println("\naddNewItemToComboBox called ");
// tc - start
String text = comboBoxEditorTField.getText();
System.out.println("text = "+text);
int index = -1;
for (int i = 0; i < _cbox.getItemCount(); i++)
String item = ((String)_cbox.getItemAt(i));
System.out.println("item in cbox = "+item);
if (item.equals(text))
System.out.println("selecting item now...");
index = i;
_cbox.setSelectedIndex(index);
break;
if (index == -1)
_cbox.addItem(text);
int count = _cbox.getItemCount();
_cbox.setSelectedIndex(count -1);
public boolean stopCellEditing() {
System.out.println("stopCellEditing called ");
fireEditingStopped();
_cbox.transferFocus();
return true;
public boolean isCellEditable(EventObject event) {
return true;
public boolean shouldSelectCell(EventObject event) {
return true;
public Object getCellEditorValue() {
System.out.println("- getCellEditorValue called returning val: "+_cbox.getSelectedItem());
return _cbox.getSelectedItem();
public Component getTableCellEditorComponent(JTable table, Object value,
boolean isSelected, int row, int column) {
System.out.println("\ngetTableCellEditorComponent "+value);
String text = (String)value;
for (int i = 0; i < _cbox.getItemCount(); i++)
String item = ((String)_cbox.getItemAt(i));
System.out.println("item in box "+item);
if (item.equals(text))
System.out.println("selecting item now...");
_cbox.setSelectedIndex(i);
break;
return _cbox;I was using java 1.5.0_06 in my application and I had this problem
When I upgraded to java 1.6.0_01, I no longer had this issue.
This seems to be a bug in 1.5 version of Java that has been fixed in 1.6
thanks, -
How to put JComboBox in JTable?
I'm trying to put JComboBox in JTable, the following is my table model. The problem is that it doesn't display a JComboBox but a string of it, something like "MyTableModel$JComboBox....". Any help would be appreciated.
class MyModel extends AbstractTableModel {
String[] columnNames = {"Column One", "Column One"};
String[] boxItem = {"Item One", "Item Two"};
String[] rows = {"Row One", "Row Two"};
JComboBox[] boxes = {
new JComboBox(boxItem),
new JComboBox(boxItem)
Object[][] data = new Object[][]{rows, boxes};
public Object getValueAt(int row, int col) {
return data[col][row];
}Hi,
the TableModel is the wrong place to put the combo box. A model is just a representation for the data displayed in the table.
A combo box, on the other hand, is a certain way for the user to edit the values in the table (and in the model). To change the way a user edits in a table you have to set the TableCellEditor. You can do this for the whole table or for a certain column.
// in the JTable's constructor or init method
// to set JComboBox in 2nd column
// get 2nd column
TableColumn column = myTable.getColumnModel().getColumn(1);
// create combo box
JComboBox combo = new JComboBox();
combo.add("ItemOne");
combo.add("ItemTwo");
// set as editor for the column
DefaultCellEditor editor = new DefaultCellEditor(combo);
column.setCellEditor(editor);This is just an example. Try it w/ a simple table. -
There is a bug in Jdk1.5 (bug#4684090) - When TAB out from Editable Jcombobox in JTable, the focus is moved to outside JTable instead of next cell.
What is the best workaround for thsi bug.
Thanks,
VJI was using java 1.5.0_06 in my application and I had this problem
When I upgraded to java 1.6.0_01, I no longer had this issue.
This seems to be a bug in 1.5 version of Java that has been fixed in 1.6
thanks, -
Placing JComboBox in JTable ColumnHeader
Can any one help me on how to place a JComboBox in JTable ColumnHeader....?
try this:
package ComponentDisplayer;
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
class JComponentCellRenderer implements TableCellRenderer
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
return (JComponent)value;
}and
package ComponentDisplayer;
import java.awt.*;
import java.util.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
public class Pable
public static void main(String[] args)
JFrame frame = new JFrame("Table");
frame.addWindowListener( new WindowAdapter() {
public void windowClosing(WindowEvent e)
Window win = e.getWindow();
win.setVisible(false);
win.dispose();
System.exit(0);
JTable table = new JTable(3,2);
TableCellRenderer renderer = new JComponentCellRenderer();
TableColumnModel columnModel = table.getColumnModel();
TableColumn column0 = columnModel.getColumn(0);
TableColumn column1 = columnModel.getColumn(1);
column0.setHeaderRenderer(renderer);
JComboBox jb=new JComboBox();
jb.insertItemAt("well", 0);
jb.insertItemAt("done", 1);
column0.setHeaderValue(jb);
column1.setHeaderRenderer(renderer);
column1.setHeaderValue(new JComboBox());
table.setAutoResizeMode(table.AUTO_RESIZE_ALL_COLUMNS);
table.setSize(900, 1200);
JScrollPane sp = new JScrollPane(table);
table.setColumnSelectionAllowed(false);
table.setRowSelectionAllowed(true);
frame.getContentPane().add( sp );
frame.pack();
frame.setVisible(true);
//frame.show();
}as you can see adding it is not that hard but you cannot interact with them because if my memory serves well, tableheaders cannot have focus by default. So you gotta write your own implementation of header (may be using sth like: )public class MyTableHeaderRenderer extends JComponent implements
TableCellRenderer {
public MyTableHeaderRenderer() {
// TODO Auto-generated constructor stub
public Component getTableCellRendererComponent(JTable arg0, Object arg1,
boolean arg2, boolean arg3, int arg4, int arg5) {
// TODO Auto-generated method stub
return (JComponent)arg1;
}and then use this as default renderer in your implementation.)
E,ther you have to handle setfocus thing or keep track of mouse events
I hope this helps -
I have a jcombobox inside jtable.now i want to access its items by keys only..without using F2 key.for example if i press 's' key..the whole combobox shud popup and value 'string' is selected.please help me regarding this.
I am not sure if I understand your question exactly. Your table's row height is not high enough so you may need to add a line of code like:
table.setRowHeight(table.getRowHeight() + 4);to solve your problem. -
Not Updating the Values in the JComboBox and JTable
Hi Friends
In my program i hava Two JComboBox and One JTable. I Update the ComboBox with different field on A Table. and then Display a list of record in the JTable.
It is Displaying the Values in the Begining But when i try to Select the Next Item in the ComboBox it is not Updating the Records Eeither to JComboBox or JTable.
MY CODE is this
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.DefaultComboBoxModel.*;
import javax.swing.table.*;
import java.sql.*;
import java.util.*;
public class SearchBook extends JDialog implements ActionListener
private JComboBox comboCategory,comboAuthor;
private JSplitPane splitpane;
private JTable table;
private JToolBar toolBar;
private JButton btnclose, btncancel;
private JPanel panel1,panel2,panel3,panel4;
private JLabel lblCategory,lblAuthor;
private Container c;
//DefaultTableModel model;
Statement st;
ResultSet rs;
Vector v = new Vector();
public SearchBook (Connection con)
// Property for JDialog
setTitle("Search Books");
setLocation(40,110);
setModal(true);
setSize(750,450);
// Creating ToolBar Button
btnclose = new JButton(new ImageIcon("Images/export.gif"));
btnclose.addActionListener(this);
// Creating Tool Bar
toolBar = new JToolBar();
toolBar.add(btnclose);
try
st=con.createStatement();
rs =st.executeQuery("SELECT BCat from Books Group By Books.BCat");
while(rs.next())
v.add(rs.getString(1));
catch(SQLException ex)
System.out.println("Error");
panel1= new JPanel();
panel1.setLayout(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
c.fill = GridBagConstraints.HORIZONTAL;
lblCategory = new JLabel("Category:");
lblCategory.setHorizontalAlignment (JTextField.CENTER);
c.gridx=2;
c.gridy=2;
panel1.add(lblCategory,c);
comboCategory = new JComboBox(v);
comboCategory.addActionListener(this);
c.ipadx=20;
c.gridx=3;
c.gridwidth=1;
c.gridy=2;
panel1.add(comboCategory,c);
lblAuthor = new JLabel("Author/Publisher:");
c.gridwidth=2;
c.gridx=1;
c.gridy=4;
panel1.add(lblAuthor,c);
lblAuthor.setHorizontalAlignment (JTextField.LEFT);
comboAuthor = new JComboBox();
comboAuthor.addActionListener(this);
c.insets= new Insets(20,0,0,0);
c.ipadx=20;
c.gridx=3;
c.gridy=4;
panel1.add(comboAuthor,c);
comboAuthor.setBounds (125, 165, 175, 25);
table = new JTable();
JScrollPane scrollpane = new JScrollPane(table);
//panel2 = new JPanel();
//panel2.add(scrollpane);
splitpane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,panel1,scrollpane);
splitpane.setDividerSize(15);
splitpane.setDividerLocation(190);
getContentPane().add(toolBar,BorderLayout.NORTH);
getContentPane().add(splitpane);
public void actionPerformed(ActionEvent ae)
Object obj= ae.getSource();
if(obj==comboCategory)
String selecteditem = (String)comboCategory.getSelectedItem();
displayAuthor(selecteditem);
System.out.println("Selected Item"+selecteditem);
else if(obj==btnclose)
setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
else if(obj==comboAuthor)
String selecteditem1 = (String)comboAuthor.getSelectedItem();
displayavailablity(selecteditem1);
//System.out.println("Selected Item"+selecteditem1);
System.out.println("Selected Author"+selecteditem1);
private void displayAuthor(String selecteditem)
try
{ Vector data = new Vector();
rs= st.executeQuery("SELECT BAuthorandPublisher FROM Books where BCat='" + selecteditem + "' Group By Books.BAuthorandPublisher");
System.out.println("Executing");
while(rs.next())
data.add(rs.getString(1));
//((DefaultComboBoxModel)comboAuthor.getModel()).setVectorData(data);
comboAuthor.setModel(new DefaultComboBoxModel(data));
catch(SQLException ex)
System.out.println("ERROR");
private void displayavailablity(String selecteditem1)
try
Vector columnNames = new Vector();
Vector data1 = new Vector();
rs= st.executeQuery("SELECT * FROM Books where BAuthorandPublisher='" + selecteditem1 +"'");
ResultSetMetaData md= rs.getMetaData();
int columns =md.getColumnCount();
String booktblheading[]={"Book ID","Book NAME","BOOK AUTHOR/PUBLISHER","REFRENCE","CATEGORY"};
for(int i=1; i<= booktblheading.length;i++)
columnNames.addElement(booktblheading[i-1]);
while(rs.next())
Vector row = new Vector(columns);
for(int i=1;i<=columns;i++)
row.addElement(rs.getObject(i));
data1.addElement(row);
//System.out.println("data is:"+data);
((DefaultTableModel)table.getModel()).setDataVector(data1,columnNames);
//DefaultTableModel model = new DefaultTableModel(data1,columnNames);
//table.setModel(model);
rs.close();
st.close();
catch(SQLException ex)
}Please check my code and give me some Better Solution
Thank youYou already have a posting on this topic:
http://forum.java.sun.com/thread.jspa?threadID=5143235 -
How to use JButton as a JTable column header?
I'd like to use JButtons as my JTable's column headers.
I built a JButton subclass which implemented TableCellRenderer and passed it to one of my table column's setHeaderRender method. The resulting header is a component that looks like a JButton but when clicked, it does not visually depress or fire any ActionEvents.You might want to check this example and use it accordingly for your requirements.
http://www2.gol.com/users/tame/swing/examples/JTableExamples5.html
Reason: The reason you're unable to perform actions on JButton is JTableHeader doesn't relay the mouse events to your JButtons.
I hope this helps.
have fun, ganesh.
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