Jtable filtering

Posted on 2008-10-11
Last Modified: 2013-12-22
How to use filter on a particular column if  jtable depending on key stroke. LIke if press A then then only rows matching A as starting character of that particular column should display. If i press AB then starting with AB like this.

Any help appreciated.

Question by:techvts

Expert Comment

ID: 22694713
Quick idea:
Add a textfield to the form/panel/frame. Give the textfield focus (so that typing will change the textfield values). Add a listener to the textfield (textfield.getDocument().addDocumentListener(yourListener);) and update your table when the textfield value has been changed.
For JTable filtering there are lots of tutorials out there (e.g.

Good Luck!

Accepted Solution

mih earned 50 total points
ID: 22911132
There is a good tutorial on the subject of keystroke capture at However, the following may also help (although will only search on alphanumeric text cell content within the most recently selected table column as it currently stands):

import java.awt.event.KeyAdapter;

import java.awt.event.KeyEvent;

import javax.swing.JTable;


 * Example (cut-down) implementation of a keyboard listener for

 * providing JTable row selection via keyboard input matches to

 * column content. Additional validation and error checking should

 * be included in any production version.

 * <p>

 * Copyright (c) 2008, Innovation Science Pty Ltd. This software

 * is licensed under the <a href=

 * "">

 * CC-GNU LGPL</a> version 2.1 or later.

 * <p>

 * @author MB/MH, Innovation Science Pty Ltd

 * @version 1.0.0


public class ExampleKeyListener extends KeyAdapter


  private JTable theTable;

  private long lastKeyTime = 0;

  private StringBuffer currentString;

  public ExampleKeyListener ( JTable aTable )



    theTable = aTable;

    currentString = new StringBuffer();



   * Scrolls to and selects the row of the table associated with this

   * Key Listener instance by matching the sequence of characters

   * pressed during the past two (2) seconds with the contents of 

   * cells in the currently selected table column. The first cell

   * containing text that starts with the search character sequence

   * will determine the row to be selected. No selection change is 

   * made if the character sequence does not match any of the cells

   * in the currently selected table column. 


  public void keyPressed( KeyEvent aKeyEvent )


    // Reset the search string if too much time has elapsed since 

    //  the last key press event

    long currentTime = System.currentTimeMillis();

    if ((currentTime - lastKeyTime) > 2000)


      currentString.setLength( 0 );


    lastKeyTime = currentTime;

    // Determine key that caused KeyEvent to be generated



    char keyChar = aKeyEvent.getKeyChar();

    currentString.append( keyChar );

    // Determine the currently selected table column (default to

    // first column)

    int columnIndex = Math.max( theTable.getSelectedColumn(), 0 );

    // Loop through each value in the table and check if 

    //  it matches the current String

    int rowCount = theTable.getRowCount();

    String testString = currentString.toString().toLowerCase();

    for (int rowIndex = 0; rowIndex < rowCount; rowIndex++) 


      String rowValue = ((String)theTable.getValueAt( rowIndex,

                          columnIndex )).toLowerCase();

      if (rowValue.startsWith( testString )) 


        // Scroll to and highlight the matching selection

        theTable.setRowSelectionInterval( rowIndex, rowIndex );


            theTable.getCellRect( rowIndex, columnIndex, true ) );






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