How to add autocompletion to jtable

I guess you can use keyListener and modify your list with each key - probably not very simple stuff

currently i am using a jtextfield  and jlist. And i am able to display all the words that matches in jtextfield.  How can i render my jtextfield to each jtable cell and i want to the show the jlist only when we select the table cell for editing, u can say as a popup list ??

I gues you need to register some cell selection event
and popup the list when selection ocuurs.

Perhaps this will be  of some use:

http://www.exampledepot.com/egs/javax.swing.table/SelEvent.html

http://www.exampledepot.com/egs/javax.swing.table/GetSel.html

I have added a jtextfield and default table cell editor. when we add a new row  and start editing the cell , a dialog opens below the textfiled that display a jlist of all suggetation. I can select the word with mouse that display in jtextfield.  But when i select any thing in list keyboard  and press enter key , the selected word does not display in text field ,  instead it call the table model listener. How can i make so that when press enter key on list view it display the selected text in text field, and after if i press the enter key table model listener will be callled ??

You need to subclass javax.swing.AbstractCellEditor and have your class implement javax.swing.table.TableCellEditor.  Your class should contain both the JTextField and JList components as well as a JPanel that contains them.  The getTableCellEditorComponent() method should configure the values of the text field and list, then return the panel as the editor component.  (You don't need to recreate the GUI elements every time they are needed, that will just waste memory and slow down your system.)

You should attach a KeyListener to the text field (enable key events) and update the list accordingly as the text changes.  When a selection is made in the list, you should update the text field and, if that selection should trigger the end of the cell editing, call fireEditingStopped() to notify the table.