Add JTree in JTable

How to add JTree in JTable?
Please tell me?

you need to use a TableCellRenderer, that implements your JTree, for cell renderers see http://java.sun.com/docs/books/tutorial/uiswing/components/table.html and http://java.sun.com/docs/books/tutorial/uiswing/components/table.html#renderer
thomas

Similar Messages

Add Jcombo in Jtable at run time

hello,
i want to add jcombo box in jtable every cell & i also add column in run time.proble is when i add new column that time last column combo is add but prievious column its remove automatic.
so give me some code & where i can get see good example for add combo in jtable.
thanks

hi j-rg,
It was really appreaciating to c ur reply, regarding the specific problem.Actually wht i was facing the peoblem, Am adding a colomn in the run time and in that column am adding a combo in each cells of that column.AS i was expecting am able to add a new colum in th erum time with the combo in each cells of that column,now when am adding another column in the run time am getting all the required things,but the problem is " in the previous cloumn am not getting that combo"(only the combo is been added in the last column).
What am expecting is the combo should be there in each cell of the column(all columns)
Am also sending the code wht am using, plz have a look below,
df1.addColumn(result);
TableColumn aa= tb1.getColumnModel().getColumn(tb1.getColumnCount()-1);
aa.setCellEditor(new DefaultCellEditor(comboBox));
wating for ur reply
thanks and regards
sandeep

How to add data into JTable

How can I add data into JTable, for instance ("Mike", "Gooler", 21).

How can I add data into JTable, for instance ("Mike",
"Gooler", 21).You will have very good results if you segregate out the table model as a seperate user class and provide a method to add a row there. In fact, if you use the table to reflect a database table you can add the row inplace using the existing cursor. I believe it's TableExample2 in the jdk\demo\jfc\TableExamples that has a very good example of this.
Walt

DnD from JTree to JTable

Hi guys,
It seems JTree DnD support is a quit difficult feature to implement of all swing components.
I'm writing an application in which I have a JTree structure representing the file system of user machine and another JTable component at the right.
I want to be able to drag files nodes from left JTree to right JTable.
I would appreciate a lot if someone share with me some source code examples for this functionality.
can someone post some basic java code to get me started or point me to some web resource discussing this feature?
thanks much.

http://forum.java.sun.com/thread.jspa?threadID=296255Thank you. I already looked at this thread but it's not what i'm looking for: it shows dnd from a JTree to another JTree..however i need to implement dnd from JTree to JTable.
Is there some basic example on how to do that ?
thanks.

Different look of button in jtree or jtable (windows/linux)

Hi.
I have jbutton on jtree(in jtable is the same problem) it looks like this on linux: http://mikel.pl/button.jpg .
On windows eveyrthink is ok. I tried to set RaisedBevelBorder but in this case on windows button looks awful. Is any trick to get the same look of button without checking what system is running?

Yes and no. Linux and Windows use different LookAndFeels by default, meaning the buttons are painted differently. Just setting the same border will not do in this case. The only way of having the application look exactly the same on both platforms is to manually set a LookAndFeel available on both systems. This should be the case for the MetalLookAndFeel, the SynthLookAndFeel and, I believe, for the Linux LookAndFeels as well.

SAMPLE CODE + HOW ADD JCOMBOBOX IN JTABLE

HI,
ALL OF U
PLZ SUGGEST ME HOW TO ADD COMBOBOX IN JTABLE.
AND ALSO TELL HOW WE CAN ADD ITEMS IN COMBOBOX AT RUN TIME.
PLZ SUGGEST ME.
THANX IN ADVANCE.
BYE

Hi if you google you find a lot
http://www.google.be/search?q=JTable+combobox&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:nl:official&client=firefox-a
and
http://www.google.be/search?q=JTable+combobox+example&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:nl:official&client=firefox-a
Satanduvel

One model for JTree and JTable

Hi.
Is it possible for a JTree and a JTable to share one model?
Thank you

Hope u r not using Comonent TreeTable
If u have Tree & Table different components, just want to have a common model then u can try this,
It is nothing but default implementation given in DefaultTableModel
public class MyTreeTableModel extends DefaultTreeModel implements TableModel, Serializable {
protected Vector dataVector;
/** List of listeners */
protected EventListenerList listenerList = new EventListenerList();
/** The <code>Vector</code> of column identifiers. */
protected Vector columnIdentifiers;
public MyTreeTableModel(TreeNode root) {
this(root, false);
// constructor for TreeModel only
public MyTreeTableModel(TreeNode root, boolean asksAllowsChildren) {
super(root, asksAllowsChildren);
// constructor for TableModel only
public MyTreeTableModel() {
this(0, 0);
private static Vector newVector(int size) {
Vector v = new Vector(size);
v.setSize(size);
return v;
// constructor for TableModel only
public MyTreeTableModel(int rowCount, int columnCount) {
this(newVector(columnCount), rowCount);
// constructor for TableModel only
public MyTreeTableModel(Vector columnNames, int rowCount) {
super(null);
setDataVector(newVector(rowCount), columnNames);
// constructor for TableModel only
public MyTreeTableModel(Object[] columnNames, int rowCount) {
this(convertToVector(columnNames), rowCount);
// constructor for TableModel only
public MyTreeTableModel(Vector data, Vector columnNames) {
super(null);
setDataVector(data, columnNames);
// constructor for TableModel only
public MyTreeTableModel(Object[][] data, Object[] columnNames) {
super(null);
setDataVector(data, columnNames);
* Returns a default name for the column using spreadsheet conventions:
* A, B, C, ... Z, AA, AB, etc. If <code>column</code> cannot be found,
* returns an empty string.
* @param column the column being queried
* @return a string containing the default name of <code>column</code>
private String getDefaultColumnName(int column) {
String result = "";
for (; column >= 0; column = column / 26 - 1) {
result = (char)((char)(column%26)+'A') + result;
return result;
* Returns a column given its name.
* Implementation is naive so this should be overridden if
* this method is to be called often. This method is not
* in the <code>TableModel</code> interface and is not used by the
* <code>JTable</code>.
* @param columnName string containing name of column to be located
* @return the column with <code>columnName</code>, or -1 if not found
public int findColumn(String columnName) {
for (int i = 0; i < getColumnCount(); i++) {
if (columnName.equals(getColumnName(i))) {
return i;
return -1;
* Returns <code>Object.class</code> regardless of <code>columnIndex</code>.
* @param columnIndex the column being queried
* @return the Object.class
public Class getColumnClass(int columnIndex) {
return Object.class;
// Managing Listeners
* Adds a listener to the list that's notified each time a change
* to the data model occurs.
* @param l the TableModelListener
public void addTableModelListener(TableModelListener l) {
listenerList.add(TableModelListener.class, l);
* Removes a listener from the list that's notified each time a
* change to the data model occurs.
* @param l the TableModelListener
public void removeTableModelListener(TableModelListener l) {
listenerList.remove(TableModelListener.class, l);
* Returns an array of all the table model listeners
* registered on this model.
* @return all of this model's <code>TableModelListener</code>s
* or an empty
* array if no table model listeners are currently registered
public TableModelListener[] getTableModelListeners() {
return (TableModelListener[])listenerList.getListeners(
TableModelListener.class);
// Fire methods
* Notifies all listeners that all cell values in the table's
* rows may have changed. The number of rows may also have changed
* and the <code>JTable</code> should redraw the
* table from scratch. The structure of the table (as in the order of the
* columns) is assumed to be the same.
public void fireTableDataChanged() {
fireTableChanged(new TableModelEvent(this));
* Notifies all listeners that the table's structure has changed.
* The number of columns in the table, and the names and types of
* the new columns may be different from the previous state.
* If the <code>JTable</code> receives this event and its
* <code>autoCreateColumnsFromModel</code>
* flag is set it discards any table columns that it had and reallocates
* default columns in the order they appear in the model. This is the
* same as calling <code>setModel(TableModel)</code> on the
* <code>JTable</code>.
public void fireTableStructureChanged() {
fireTableChanged(new TableModelEvent(this, TableModelEvent.HEADER_ROW));
* Notifies all listeners that rows in the range
* <code>[firstRow, lastRow]</code>, inclusive, have been inserted.
* @param firstRow the first row
* @param lastRow the last row
public void fireTableRowsInserted(int firstRow, int lastRow) {
fireTableChanged(new TableModelEvent(this, firstRow, lastRow,
TableModelEvent.ALL_COLUMNS, TableModelEvent.INSERT));
* Notifies all listeners that rows in the range
* <code>[firstRow, lastRow]</code>, inclusive, have been updated.
* @param firstRow the first row
* @param lastRow the last row
public void fireTableRowsUpdated(int firstRow, int lastRow) {
fireTableChanged(new TableModelEvent(this, firstRow, lastRow,
TableModelEvent.ALL_COLUMNS, TableModelEvent.UPDATE));
* Notifies all listeners that rows in the range
* <code>[firstRow, lastRow]</code>, inclusive, have been deleted.
* @param firstRow the first row
* @param lastRow the last row
public void fireTableRowsDeleted(int firstRow, int lastRow) {
fireTableChanged(new TableModelEvent(this, firstRow, lastRow,
TableModelEvent.ALL_COLUMNS, TableModelEvent.DELETE));
* Notifies all listeners that the value of the cell at
* <code>[row, column]</code> has been updated.
* @param row row of cell which has been updated
* @param column column of cell which has been updated
public void fireTableCellUpdated(int row, int column) {
fireTableChanged(new TableModelEvent(this, row, row, column));
* Forwards the given notification event to all
* <code>TableModelListeners</code> that registered
* themselves as listeners for this table model.
* @param e the event to be forwarded
public void fireTableChanged(TableModelEvent e) {
// Guaranteed to return a non-null array
Object[] listeners = listenerList.getListenerList();
// Process the listeners last to first, notifying
// those that are interested in this event
for (int i = listeners.length-2; i>=0; i-=2) {
if (listeners==TableModelListener.class) {
((TableModelListener)listeners[i+1]).tableChanged(e);
* Returns an array of all the objects currently registered
* as <code>FooListener</code>s
* upon this <code>AbstractTableModel</code>.
* <code>FooListener</code>s are registered using the
* <code>addFooListener</code> method.
* 
* You can specify the <code>listenerType</code> argument
* with a class literal,
* such as
* <code>FooListener.class</code>.
* For example, you can query a
* model <code>m</code>
* for its table model listeners with the following code:
* <pre>TableModelListener[] tmls = (TableModelListener[])(m.getListeners(TableModelListener.class));</pre>
* If no such listeners exist, this method returns an empty array.
* @param listenerType the type of listeners requested; this parameter
* should specify an interface that descends from
* <code>java.util.EventListener</code>
* @return an array of all objects registered as
* <code>FooListener</code>s on this component,
* or an empty array if no such
* listeners have been added
* @exception ClassCastException if <code>listenerType</code>
* doesn't specify a class or interface that implements
* <code>java.util.EventListener</code>
public EventListener[] getListeners(Class listenerType) {
return listenerList.getListeners(listenerType);
* Returns the <code>Vector</code> of <code>Vectors</code>
* that contains the table's
* data values. The vectors contained in the outer vector are
* each a single row of values. In other words, to get to the cell
* at row 1, column 5: 
* <code>((Vector)getDataVector().elementAt(1)).elementAt(5);</code>
* @return the vector of vectors containing the tables data values
public Vector getDataVector() {
return dataVector;
private static Vector nonNullVector(Vector v) {
return (v != null) ? v : new Vector();
* Replaces the current <code>dataVector</code> instance variable
* with the new Vector of rows, <code>dataVector</code>.
* <code>columnIdentifiers</code> are the names of the new
* columns. The first name in <code>columnIdentifiers</code> is
* mapped to column 0 in <code>dataVector</code>. Each row in
* <code>dataVector</code> is adjusted to match the number of
* columns in <code>columnIdentifiers</code>
* either by truncating the <code>Vector</code> if it is too long,
* or adding <code>null</code> values if it is too short.
* Note that passing in a <code>null</code> value for
* <code>dataVector</code> results in unspecified behavior,
* an possibly an exception.
* @param dataVector the new data vector
* @param columnIdentifiers the names of the columns
public void setDataVector(Vector dataVector, Vector columnIdentifiers) {
this.dataVector = nonNullVector(dataVector);
this.columnIdentifiers = nonNullVector(columnIdentifiers);
justifyRows(0, getRowCount());
fireTableStructureChanged();
* Replaces the value in the <code>dataVector</code> instance
* variable with the values in the array <code>dataVector</code>.
* The first index in the <code>Object[][]</code>
* array is the row index and the second is the column index.
* <code>columnIdentifiers</code> are the names of the new columns.
* @param dataVector the new data vector
* @param columnIdentifiers the names of the columns
public void setDataVector(Object[][] dataVector, Object[] columnIdentifiers) {
setDataVector(convertToVector(dataVector), convertToVector(columnIdentifiers));
* Equivalent to <code>fireTableChanged</code>.
* @param event the change event
public void newDataAvailable(TableModelEvent event) {
fireTableChanged(event);
// Manipulating rows
private void justifyRows(int from, int to) {
// Sometimes the MyTreeTableModel is subclassed
// instead of the AbstractTableModel by mistake.
// Set the number of rows for the case when getRowCount
// is overridden.
dataVector.setSize(getRowCount());
for (int i = from; i < to; i++) {
if (dataVector.elementAt(i) == null) {
dataVector.setElementAt(new Vector(), i);
((Vector)dataVector.elementAt(i)).setSize(getColumnCount());
* Ensures that the new rows have the correct number of columns.
* This is accomplished by using the <code>setSize</code> method in
* <code>Vector</code> which truncates vectors
* which are too long, and appends <code>null</code>s if they
* are too short.
* This method also sends out a <code>tableChanged</code>
* notification message to all the listeners.
* @param e this <code>TableModelEvent</code> describes
* where the rows were added.
* If <code>null</code> it assumes
* all the rows were newly added
public void newRowsAdded(TableModelEvent e) {
justifyRows(e.getFirstRow(), e.getLastRow() + 1);
fireTableChanged(e);
* Equivalent to <code>fireTableChanged</code>.
* @param event the change event
public void rowsRemoved(TableModelEvent event) {
fireTableChanged(event);
* Obsolete as of Java 2 platform v1.3. Please use <code>setRowCount</code> instead.
* Sets the number of rows in the model. If the new size is greater
* than the current size, new rows are added to the end of the model
* If the new size is less than the current size, all
* rows at index <code>rowCount</code> and greater are discarded. 
* @param rowCount the new number of rows
public void setNumRows(int rowCount) {
int old = getRowCount();
if (old == rowCount) {
return;
dataVector.setSize(rowCount);
if (rowCount <= old) {
fireTableRowsDeleted(rowCount, old-1);
else {
justifyRows(old, rowCount);
fireTableRowsInserted(old, rowCount-1);
* Sets the number of rows in the model. If the new size is greater
* than the current size, new rows are added to the end of the model
* If the new size is less than the current size, all
* rows at index <code>rowCount</code> and greater are discarded. 
public void setRowCount(int rowCount) {
setNumRows(rowCount);
* Adds a row to the end of the model. The new row will contain
* <code>null</code> values unless <code>rowData</code> is specified.
* Notification of the row being added will be generated.
* @param rowData optional data of the row being added
public void addRow(Vector rowData) {
insertRow(getRowCount(), rowData);
* Adds a row to the end of the model. The new row will contain
* <code>null</code> values unless <code>rowData</code> is specified.
* Notification of the row being added will be generated.
* @param rowData optional data of the row being added
public void addRow(Object[] rowData) {
addRow(convertToVector(rowData));
* Inserts a row at <code>row</code> in the model. The new row
* will contain <code>null</code> values unless <code>rowData</code>
* is specified. Notification of the row being added will be generated.
* @param row the row index of the row to be inserted
* @param rowData optional data of the row being added
* @exception ArrayIndexOutOfBoundsException if the row was invalid
public void insertRow(int row, Vector rowData) {
dataVector.insertElementAt(rowData, row);
justifyRows(row, row+1);
fireTableRowsInserted(row, row);
* Inserts a row at <code>row</code> in the model. The new row
* will contain <code>null</code> values unless <code>rowData</code>
* is specified. Notification of the row being added will be generated.
* @param row the row index of the row to be inserted
* @param rowData optional data of the row being added
* @exception ArrayIndexOutOfBoundsException if the row was invalid
public void insertRow(int row, Object[] rowData) {
insertRow(row, convertToVector(rowData));
private static int gcd(int i, int j) {
return (j == 0) ? i : gcd(j, i%j);
private static void rotate(Vector v, int a, int b, int shift) {
int size = b - a;
int r = size - shift;
int g = gcd(size, r);
for(int i = 0; i < g; i++) {
int to = i;
Object tmp = v.elementAt(a + to);
for(int from = (to + r) % size; from != i; from = (to + r) % size) {
v.setElementAt(v.elementAt(a + from), a + to);
to = from;
v.setElementAt(tmp, a + to);
* Moves one or more rows from the inlcusive range <code>start</code> to
* <code>end</code> to the <code>to</code> position in the model.
* After the move, the row that was at index <code>start</code>
* will be at index <code>to</code>.
* This method will send a <code>tableChanged</code> notification
* message to all the listeners. 
* <pre>
* Examples of moves:
* 
* 1. moveRow(1,3,5);
* a|B|C|D|e|f|g|h|i|j|k - before
* a|e|f|g|h|B|C|D|i|j|k - after
* 
* 2. moveRow(6,7,1);
* a|b|c|d|e|f|G|H|i|j|k - before
* a|G|H|b|c|d|e|f|i|j|k - after
* 
* </pre>
* @param start the starting row index to be moved
* @param end the ending row index to be moved
* @param to the destination of the rows to be moved
* @exception ArrayIndexOutOfBoundsException if any of the elements
* would be moved out of the table's range
public void moveRow(int start, int end, int to) {
int shift = to - start;
int first, last;
if (shift < 0) {
first = to;
last = end;
else {
first = start;
last = to + end - start;
rotate(dataVector, first, last + 1, shift);
fireTableRowsUpdated(first, last);
* Removes the row at <code>row</code> from the model. Notification
* of the row being removed will be sent to all the listeners.
* @param row the row index of the row to be removed
* @exception ArrayIndexOutOfBoundsException if the row was invalid
public void removeRow(int row) {
dataVector.removeElementAt(row);
fireTableRowsDeleted(row, row);
// Manipulating columns
* Replaces the column identifiers in the model. If the number of
* <code>newIdentifier</code>s is greater than the current number
* of columns, new columns are added to the end of each row in the model.
* If the number of <code>newIdentifier</code>s is less than the current
* number of columns, all the extra columns at the end of a row are
* discarded. 
* @param newIdentifiers vector of column identifiers. If
* <code>null</code>, set the model
* to zero columns
public void setColumnIdentifiers(Vector columnIdentifiers) {
setDataVector(dataVector, columnIdentifiers);
* Replaces the column identifiers in the model. If the number of
* <code>newIdentifier</code>s is greater than the current number
* of columns, new columns are added to the end of each row in the model.
* If the number of <code>newIdentifier</code>s is less than the current
* number of columns, all the extra columns at the end of a row are
* discarded. 
* @param newIdentifiers array of column identifiers.
* If <code>null</code>, set
* the model to zero columns
public void setColumnIdentifiers(Object[] newIdentifiers) {
setColumnIdentifiers(convertToVector(newIdentifiers));
* Sets the number of columns in the model. If the new size is greater
* than the current size, new columns are added to the end of the model
* with <code>null</code> cell values.
* If the new size is less than the current size, all columns at index
* <code>columnCount</code> and greater are discarded.
* @param columnCount the new number of columns in the model
public void setColumnCount(int columnCount) {
columnIdentifiers.setSize(columnCount);
justifyRows(0, getRowCount());
fireTableStructureChanged();
* Adds a column to the model. The new column will have the
* identifier <code>columnName</code>, which may be null. This method
* will send a
* <code>tableChanged</code> notification message to all the listeners.
* This method is a cover for <code>addColumn(Object, Vector)</code> which
* uses <code>null</code> as the data vector.
* @param columnName the identifier of the column being added
public void addColumn(Object columnName) {
addColumn(columnName, (Vector)null);
* Adds a column to the model. The new column will have the
* identifier <code>columnName</code>, which may be null.
* <code>columnData</code> is the
* optional vector of data for the column. If it is <code>null</code>
* the column is filled with <code>null</code> values. Otherwise,
* the new data will be added to model starting with the first
* element going to row 0, etc. This method will send a
* <code>tableChanged</code> notification message to all the listeners.
* @param columnName the identifier of the column being added
* @param columnData optional data of the column being added
public void addColumn(Object columnName, Vector columnData) {
columnIdentifiers.addElement(columnName);
if (columnData != null) {
int columnSize = columnData.size();
if (columnSize > getRowCount()) {
dataVector.setSize(columnSize);
justifyRows(0, getRowCount());
int newColumn = getColumnCount() - 1;
for(int i = 0; i < columnSize; i++) {
Vector row = (Vector)dataVector.elementAt(i);
row.setElementAt(columnData.elementAt(i), newColumn);
else {
justifyRows(0, getRowCount());
fireTableStructureChanged();
* Adds a column to the model. The new column will have the
* identifier <code>columnName</code>. <code>columnData</code> is the
* optional array of data for the column. If it is <code>null</code>
* the column is filled with <code>null</code> values. Otherwise,
* the new data will be added to model starting with the first
* element going to row 0, etc. This method will send a
* <code>tableChanged</code> notification message to all the listeners.
public void addColumn(Object columnName, Object[] columnData) {
addColumn(columnName, convertToVector(columnData));
// Implementing the TableModel interface
* Returns the number of rows in this data table.
* @return the number of rows in the model
public int getRowCount() {
return dataVector.size();
* Returns the number of columns in this data table.
* @return the number of columns in the model
public int getColumnCount() {
return columnIdentifiers.size();
* Returns the column name.
* @return a name for this column using the string value of the
* appropriate member in <code>columnIdentifiers</code>.
* If <code>columnIdentifiers</code> does not have an entry
* for this index, returns the default
* name provided by the superclass
public String getColumnName(int column) {
Object id = null;
// This test is to cover the case when
// getColumnCount has been subclassed by mistake ...
if (column < columnIdentifiers.size()) {
id = columnIdentifiers.elementAt(column);
return (id == null) ? getDefaultColumnName(column)
: id.toString();
* Returns true regardless of parameter values.
* @param row the row whose value is to be queried
* @param column the column whose value is to be queried
* @return true
public boolean isCellEditable(int row, int column) {
return true;
* Returns an attribute value for the cell at <code>row</code>
* and <code>column</code>.
* @param row the row whose value is to be queried
* @param column the column whose value is to be queried
* @return the value Object at the specified cell
* @exception ArrayIndexOutOfBoundsException if an invalid row or
* column was given
public Object getValueAt(int row, int column) {
Vector rowVector = (Vector)dataVector.elementAt(row);
return rowVector.elementAt(column);
* Sets the object value for the cell at <code>column</code> and
* <code>row</code>. <code>aValue</code> is the new value. This method
* will generate a <code>tableChanged</code> notification.
* @param aValue the new value; this can be null
* @param row the row whose value is to be changed
* @param column the column whose value is to be changed
* @exception ArrayIndexOutOfBoundsException if an invalid row or
* column was given
public void setValueAt(Object aValue, int row, int column) {
Vector rowVector = (Vector)dataVector.elementAt(row);
rowVector.setElementAt(aValue, column);
fireTableCellUpdated(row, column);
// Protected Methods
* Returns a vector that contains the same objects as the array.
* @param anArray the array to be converted
* @return the new vector; if <code>anArray</code> is <code>null</code>,
* returns <code>null</code>
protected static Vector convertToVector(Object[] anArray) {
if (anArray == null) {
return null;
Vector v = new Vector(anArray.length);
for (int i=0; i < anArray.length; i++) {
v.addElement(anArray[i]);
return v;
* Returns a vector of vectors that contains the same objects as the array.
* @param anArray the double array to be converted
* @return the new vector of vectors; if <code>anArray</code> is
* <code>null</code>, returns <code>null</code>
protected static Vector convertToVector(Object[][] anArray) {
if (anArray == null) {
return null;
Vector v = new Vector(anArray.length);
for (int i=0; i < anArray.length; i++) {
v.addElement(convertToVector(anArray[i]));
return v;

How to add ComboBox in Jtable Header

Hello everyone,
I want to add a Combox box in JTable Header .Basically it works as central access to whole table e.g. by selecting delete row in combo box then it should delete the current selected row.If somebody has any idea please share it.
Thanks in advance.

The individual headers are not Swing components and therefore do not respond to mouse events in the same way as Swing components. Why don't you just have a popup menu that is positioned over the currently selected row? If you want to apply an action to all selected rows then have a set of buttons placed above the table header.

How to add Chekbox in Jtable?

I am working on Swing application and my requirement is add new column that dispay the checkboxes, so user have the access to check/uncheck row for further process.
In application 3 tabbedpanes are there & in the 3rd tabbedpane table data is displaying.
//Code snippet
public class AIProductPropertiesUI
private productsTablemodel productmodel = null;
private String [] pNames = {"select","type","name","revision","marketing","relationship"};
public JPanel getMiscPanel()
productmodel= new productsTablemodel();
table = new JTable(productmodel);
protected class productsTablemodel extends AbstractTableModel
Vector productDetails ;
productsTablemodel()
productDetails = model.getProductDetails();
headerNames = model.getLabelNameMapping();
public Object getValueAt(int rowIndex, int columnIndex)
if (productDetails.size()>0)
Hashtable ht = (Hashtable) productDetails.get(rowIndex);
//ht contains the list of values for all the column as in pNames[].
// dynamic value for Select column is ""(blank string)
String str = "" ;
if(ht.containsKey(pNames[columnIndex]))
str = (String) ht.get(pNames[columnIndex]);
return str;
}else{
return null;
I tried following ways-
1)if(column==0)
return new JCheckBox("str",true);
here output is dispaying complete details of Checkbox
/* output for checkbox cell is --- javax.swing.JCheckBox[,0,0,0x0,invalid,alignmentX=0.0,alignmentY=0.5,
border=javax.swing.plaf.BorderUIResource$CompoundBorderUIResource@b1b4c3,flags=296,maximumSize=,minimumSize=,preferredSize=,defaultIcon=,
disabledIcon=,disabledSelectedIcon=,margin=javax.swing.plaf.InsetsUIResource[top=2,left=2,bottom=2,right=2],paintBorder=false,paintFocus=true,
pressedIcon=,rolloverEnabled=true,rolloverIcon=,rolloverSelectedIcon=,selectedIcon=,text=str]*/
2)overiding public Class getColumnClass(int column)
if(column==0)
return Class.forName("java.lang.Boolean");
till this point its working fine... but in above code method public Object getValueAt(int rowIndex, int columnIndex)
I am checking if(Column==0)
return Class.forName("java.lang.Boolean");
here it is throwing ClassCastException.. java.lang.Class cannot be cast to java.lang.Boolean
Please provide me solution aas soon as possible...coz from past 2 days i m stucking on this and due to this not able to move ahead on my application development.
Thanks in Advance
Sharad

more time researching instead of cross-posting would be better for you
[http://saloon.javaranch.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic&f=2&t=018027]

How to add JTextArea in JTable

Hi..
I want to add JTextArea in my table in one of the column of JTable. I have already written a code which implements TablecellEditor and TableCellRenderer. I have already succeeded to set textarea in one cell for multiple line but when i go to another cell my previous value disappears. Can anybody tell me the solution.

I think the reason that this is happening, is that you have to override the setValue method in TableModel, inorder for the value to be displayed correctly.
Another thing.
I too am trying to implement a textarea as one of the cells in a col.
But the problem is that when I create my celleditor extends TextArea and implements TableCellEditor, and compile it says that all eventLsiteners are already implemented .
And if I just extend the AbstractCellEditor, and return it in the method getCellEditor, it says incompatible types.
Can you tell me how to implement a CustomCellEditor
Thanks,

How to add events in JTable fields

Hello friends i m working with file transfer client server project in my college.In my client part i have used JTable with AbstractTableModel.
In my JTable it list the current directory files and directories under current directory .
now how can i add events to the the directories that it shows on JTable so that when i click on directory it displays files under that selected directory.
can anyone help me in that.
I will send you my code for that project if anyone can help me.
please help me to do that

You can handle row selections with selection listener but if you want to handle double clicks you can use something similar to this:
table.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e)
int column = table.columnAtPoint(e.getPoint());
int row = table.rowAtPoint(e.getPoint());
Object cellValue = table.getValueAt(row, column);
// Insert files below clicked row
});Please, be more patient in the future -you would probably get an answer if you just posted to any of these two forums.

Add component to JTable

hi
can u please tell me how to add another component to Jtable cell...
for example JCheckBox to a cell...
cheers...

If you want to add components to a JTable just to layout them, in fact you
are better off using the GridBagLayout but, if you really need to display and
use a component in a JTable, you must learn how to build renderers and editors
for a table. Have a look at http://java.sun.com/docs/books/performance/ for
some introduction to the topic, and at
http://www2.gol.com/users/tame/swing/examples/SwingExamples.html
for some implemented examples.
Hope this helps
Andrea

How can I add KeyListener to JTable editor

Hi, I want to know how can I add a KeyListener to a JTable editor?
I want to capture the event when any of the cell in the jtable has a key typed.

If your goal is to check the entered value, it's more elegant to do this in overriding
DefaultCellEditor#stopCellEditing and return false when the value is not correct.
Example from a DateEditor:
        @Override public boolean stopCellEditing() {
            String value = ((JTextField)getComponent()).getText();
            if(!value.equals("")) {
                try {
                    formatterE.parse(value);
                } catch (ParseException e) {
                    ((JComponent)getComponent()).setBorder(new LineBorder(Color.red));
                    return false;
            return super.stopCellEditing();
        }

Using key TAB to add line into JTable

I would like to know if it's possible to use the key TAB to add a line on my JTable when i'm at the last cell of the last row.
I don't know if I have to use a TableRenderer or TableListener
Thanks for your help.

Go through this thread.
http://forum.java.sun.com/thread.jsp?forum=57&thread=229525
This has the solution for your question. There you will find a method hookInsertRow() given by
Kleopatra, you can use that method in conjunction with the example code given by me or you can use my example code right there (which is clearly not the best way).
Thanks,
Kalyan

Add CheckBox to JTable

How to add a checkBox in a column of my table?
I would like to add a checkbox in column 3. Where should I add the Listener to?

Here's a simple example using a JCheckBox as a renderer:
import java.awt.*;
import java.util.*;
import javax.swing.*;
import javax.swing.table.*;
import java.text.*;
public class TableRenderer extends JFrame
    public TableRenderer()
        String[] columnNames = {"Date", "String", "Integer", "Decimal", "Boolean"};
        Object[][] data =
            {new Date(), "A", new Integer(1), new Double(5.1), new Boolean(true)},
            {new Date(), "B", new Integer(2), new Double(6.2), new Boolean(false)},
            {new Date(), "C", new Integer(3), new Double(7.3), new Boolean(true)},
            {new Date(), "D", new Integer(4), new Double(8.4), new Boolean(false)}
        DefaultTableModel model = new DefaultTableModel(data, columnNames);
        JTable table = new JTable( model )
            // Returning the Class of each column will allow different
            // renderers to be used based on Class
            public Class getColumnClass(int column)
                return getValueAt(0, column).getClass();
        table.setPreferredScrollableViewportSize(table.getPreferredSize());
        JScrollPane scrollPane = new JScrollPane( table );
        getContentPane().add( scrollPane );
        // Create cell renderer
        TableCellRenderer centerRenderer = new CenterRenderer();
        // Use renderer on a specific column
        TableColumn column = table.getColumnModel().getColumn(3);
        column.setCellRenderer( centerRenderer );
        // Use renderer on a specific Class
        table.setDefaultRenderer(String.class, centerRenderer);
          scrollPane.getViewport().setBackground(Color.red);
    public static void main(String[] args)
        TableRenderer frame = new TableRenderer();
        frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
        frame.pack();
        frame.setVisible(true);
    ** Center the text and highlight the focused cell
    class CenterRenderer extends DefaultTableCellRenderer
        public CenterRenderer()
            setHorizontalAlignment( CENTER );
        public Component getTableCellRendererComponent(
            JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
            super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
            if (hasFocus)
                setBackground( Color.cyan );
            else if (isSelected)
                setBackground( table.getSelectionBackground() );
            else
                setBackground( table.getBackground() );
            return this;
}For more information on "Using Tables" see the Swing tutorial:
http://java.sun.com/docs/books/tutorial/uiswing/components/table.html

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