JTable sorting with frozen columns
Hi All,
I have implemented a table with two frozen columns by using two Jtables within a JScrollpane. I've added a TableRowSorter to each table (the fixed and the scrollable one). The first two columns are removed from the main JTable's columnModel and the other columns are removed from the fixed JTable's columnModel. The sorting works fine but currently works on the two tables seperately. They both have the same table model which is one i implemented by extending AbstractTableModel. How can i link up the two tables so that they sort together?
Thanks
using the same instance of TableRowSorter with both tables fixed it
Similar Messages
-
In a recent project I've had the need of a Java Swing table with frozen columns.
After a long research at the Swing forum at java.sun.org and google I found out that
1. Currently there is no proper Open Source solution
2. All the postings at sun are good concepts, but far away from solutions
3. The only (for me )acceptable commercial solution is the JCTable from Quest (formerly KGroup)
Since I want to have full control over the source code of the table, I decided to collect all the tips from this forums and write my own table.
Here is the my first result:
http://jroller.com/resources/kriede/CoolTable.java
The main idea is to have two tables, one for the locked columns (=fixed columns = frozen columns) and one for the scrollable columns. With all the tips from this forum it was more or less a puzzle to make it work pretty. The next task will be to provide a JTable-like interface, meaning to write delegate/adapter methods to the API of the two nested JTable instances.The FixedColumnExample from the link that you provided doesn't work with JDK 1.3 or higher.
Anyway, putting a seperate table for the fixed columns into the row header is the first step to solve the problem of fixed columns.
The next problem is to synchonize the scrolling behaviour of the two tables. The FixedColumnExample tries to do it by overwriting the valueChange method (maybe this was working with JDK 1.8), but with JDK 1.2 or higher it is recommended to use ChangeListeners. That's what I am doing, as also described here: http://www.chka.de/swing/components/JScrollPane-bugfix.html.
Another problem is navigation with the tab or arrow keys: The default actions for those events move the selection only within one JTable. It would be nicer, if e.g. the tab key moves the selection within one row across both, the fixed and the scrollable columns.
Those problems and some more are solved in the CoolTable sample:
http://jroller.com/resources/kriede/CoolTable.java
Please try it out and send comments. -
hi!
I receive data from a database and create a JTable.
Now I would like to sort the Data.
Example:
Table with ID, Name, Weight, Height
If I click on the column named "weight" the table should be sorted by the weight...
Is there a possibility to do that?
RegardsRead this section from the Swing tutorial on "How to Use Tables" (actually read all sections). It has sample code for sorting:
http://java.sun.com/docs/books/tutorial/uiswing/components/table.html -
JTable sorting by more columns
Hi everybody
according to the tablesorter from the tutorial, is there anyone who knows how to sort by more than one column (means i sort by the first column let's say numbers 1 |C, 1 | A, 1|B, ..., then i want to sort the by the second column too, so the result should be 1 | A , 1 | B , 1| C ...).
thanks for any advice
best
markusSure, read the comments in the TableSorter class, it explains how to use the Shift and Ctrl keys to aid in sorting.
-
[ANN] xframe-swing (frozen columns with the JXTable)
The xframe team is pleased to announce the release 0.6-beta of our swing subproject, the first beta release.
Currently the main purpose of this project is the JXTable class, an extension to the JTable which offers frozen columns and groupable column headers while behaving almost exactly like the original JTable. So the intention is to have a true replacement for the JTable where ontop you can use your usual features like filtering, sorting, etc.
Since the JXTable is being used in the first few commercial projects, we got a lot of feedback and patches which improved stability and usability upto a high level. These projects are not yet finished, so we keep the beta status until the first project goes to production.
You can download xframe-swing here:
http://sourceforge.net/project/showfiles.php?group_id=48863&package_id=125567
Further Readings:
http://xframe.sourceforge.net/swing/index.html
http://jroller.com/page/kriede/20040414#swing_table_with_frozen_columnsThe FixedColumnExample from the link that you provided doesn't work with JDK 1.3 or higher.
Anyway, putting a seperate table for the fixed columns into the row header is the first step to solve the problem of fixed columns.
The next problem is to synchonize the scrolling behaviour of the two tables. The FixedColumnExample tries to do it by overwriting the valueChange method (maybe this was working with JDK 1.8), but with JDK 1.2 or higher it is recommended to use ChangeListeners. That's what I am doing, as also described here: http://www.chka.de/swing/components/JScrollPane-bugfix.html.
Another problem is navigation with the tab or arrow keys: The default actions for those events move the selection only within one JTable. It would be nicer, if e.g. the tab key moves the selection within one row across both, the fixed and the scrollable columns.
Those problems and some more are solved in the CoolTable sample:
http://jroller.com/resources/kriede/CoolTable.java
Please try it out and send comments. -
A simple question about wrong sorting with multiple sort columns in Excel 2010
Hi, everyone! I have encountered a problem that I don't know how to explain.
So I post it here because I don't know if there is another more relevant forum...
I have a data sheet with the students' scores for the course.
All the data were generated with the randbetween function,
and pasted with the values.
To rank the students by their performance,
I did the sort with the column "total score" as the first sort-column
and "final term" as the second.
The weird thing to me is that the order of the data seems problematic.
That is, all the rows are sorted correctly with the first sort-column.
But for the rows with the same values of the first sort-column,
there are some rows whose values of the second sort-column are out of order.
(please look at the data file at
www_dot_kuaipan_dot_cn/file/id_67204268108546068_dot_htm
Please change the "_dot_" to the real literal dot.
Especially the rows with 56.7 as the first sort-column value
and some other values near the tail of the list.)
I tried to manually input and sort the same values of both columns
in a near-by region. The result was correct.
When some friend copied all the data to paste in Notepad,
and reload them in excel. The problem disappears.
Some friend also tried to wrap a round function at the values of the 1st sort-column,
the sorting order became correct!
But they could not explain why either.
How confusing! I even tried to swap the first and secod sort-column;
the output was right.
All the data were generated by randbetween function and pasted with values.
Where could all the special characters, if any, come?
Can anyone give me an explanation? I would be very grateful.
Thanks in advance!Re: Sort is not in proper order
Sounds as if the data includes spaces or hidden characters that are affecting the sort.
That is indicated by the fact that manually entering the data resolves the problem.
Note: You can use a public file storage website to hold your file and add the link to it in your post.
Jim Cone
Portland, Oregon USA
Special Sort excel add-in (30+ ways to sort) - 3 week no obligation trial
https://jumpshare.com/b/O5FC6LaBQ6U3UPXjOmX2 -
Pivot table sorting with month_id and average column in BI publisher temp
In my project we are using the Oracle BI analysis for creating reports in BI publisher.
At first we are creating the report in OBIEE answers then using it as data model in BI Pub.
My reporting table holds data like below:
Month_Name Year Month_Id Compensation Emp ID
JAN 2011 1000 50 1234
FEB 2011 1001 60 1235
We need to show the data in pivot format i.e period(concated month+year) in column and comepsation values as measure and emp id in rows.I also need to show percentage i.e sum(Compensation/no of selected of periods).
For average in OBIEE pivot i have create one calulated item. But I can't sort the data(for periods with the month_id) as its spillting the average column also.
How can i sort it? like JAN2011 FEB2011 MAR2011 in pivot
also in BI pub this calculated item not showing correct value.
Please help.Hi,
You can achieve this requirement by sort order column based on the month number and year you can sort this criteria column.also by using time_key,if the time_key is in sequence.
mark if helpful/correct...
thanks,
prassu -
Sort a table with two columns based on the first
I have a powershell table with the columns 'Used Perc' and 'ID'.
This was formed from the following
$a = @{Expression={[System.Math]::Round(($_.nUsed_Avg/$_.nSize)*100,1)};Label="Used Perc";width=25}, @{Expression={$_.nStatisticalDiskIdentificationID};Label="ID";width=15}
$GLOBAL:CSV2 = Import-CSV $STATDISKOUT | Format-Table $a
Before this, the file $STATDISKOUT had the columns 'nUsed_Avg', 'nSize', and 'nStatisticalIdentificationID'.
My question is, how would I sort the new table based on 'Used Perc' but keeping the corresponding 'ID' column lined up to the right value?We use a select statement to reorder columns and recalculate, The formatters just go at the end to adjust the display.
Import-Csv <file> | select <column order format> | Format-Table
or you can do it in the table:
Import-Csv <file | Format-Table -Properties ,f1.,f2.,,f3....Here is how to inset a sort inline:
$a=@{
L='ID';
E={$_.nStatisticalDiskIdentificationID};
L='Used Perc';
E={[System.Math]::Round(($_.nUsed_Avg/$_.nSize)*100,1)}
Import-CSV $STATDISKOUT | Select $a | Sort 'Used Perc' | Format-Table -Auto
¯\_(ツ)_/¯ -
I have Table with 5 columns and say 3 rows.
I want to sort the first column.Let us say values in the first column are..CDF, MPC and ABC. so when i click on the column header now the values should be ABC, CDF and MPC..If i click on it again it should sort again reversely..Like MPC, CDF and ABC..We already have example in Java Tutorial TableSorterDemo.java, TableSorter.java..But that sort the column only once.That is it does the sorting and Place ABC, CDF and MPC in order.But when i click on the header again then no sorting takes place where as i want them to show up as MPC,CDF and ABC.Unless u sort the other column and come back to the first column again it doesn't fulfill that requirement.Any help on this is highly appreciated..
Thanks Much in advanceEric,
Thanks for the reply but iam little confused. Can u
elaborate and help me more
Thanks MuchTake a look at TableSorter.java, at the bottom, where it adds a mouse click listener to the header. The applicable line is:
int shiftPressed = e.getModifiers()&InputEvent.SHIFT_MASK;
boolean ascending = (shiftPressed == 0); It doesn't reverse sorting. By default, it uses ascending sort. Shift-Click will do descending sort. To do what you want, you should add an accessor method to determine the current value of TableSorter.ascending, then use it to determing the value to use when calling TableSorter.sortByColumn. -
Working with Boolean Column in jTable
I have generated a jTable on runtime. I have created an object of DefaultTableModel and used it to create the jTable.
DefaultTableModel model = (new DefaultTableModel(
new Object[][]{},
new String[]{
"SELECT", "SERVER"
Class[] types = new Class[]{
java.lang.Boolean.class, java.lang.Object.class
boolean[] canEdit = new boolean [] {
true, false
public Class getColumnClass(int columnIndex) {
return types[columnIndex];
public boolean isCellEditable(int rowIndex, int columnIndex) {
return canEdit [columnIndex];
jTable table = new jTable(model);
This creates a table with two columns. First one is a Boolean and the second one is a String. Boolean by default appears as check boxes. The first column is editable and the second is not.
My problem is:
I want to call some method when any of these checkboxes are selected.
Hope to find some help very soon. Its a little urgent.
Thanks in advance.Try writing your own cell renderer and editor.
-
How to get ALV Display with First column alone in sort
How to get ALV Display with First column alone in sort
HI,
You can build Internal Table and send this to the parameter "IT_SORT".
eg:
"the sorting Internal Table structure is as whown below.
DATA: t_sort_info type slis_t_sortinfo_alv.
"Build the Sort Internal Table
t_sort_info-fieldname = 'CARRID'.
t_sort_info-subtot = 'X'.
append t_sort_info.
t_sort_info-fieldname = 'FLDATE'.
t_sort_info-subtot = 'X'.
append t_sort_info.
Then pass this "IT_SORT_INFO" table to the Function module "Reuse_alv_*". (Note send the body of the Internal table only like "<b>IT_SORT = IT_SORT_INFO[]</b>".
Here i am making ALV output sorted on CARRID & FLDATE.
You can specify only the First Column name for sorting.
Regards,
Manju
Message was edited by:
MANJUNATHA KS -
Sorting with nulls last on the fact column
anybody tell me how to do the sorting with nulls last in the template? i can't change anything in data model or anywhere other than template.
i did try to put the descending order,but null values are coming in between positive and negative values.
<?sort:FACT_Column_Name;'decending';data-type='number'?>
could anyone please tell me how can i do that in template?
Thanks in advance.
Edited by: user12255470 on Apr 12, 2012 5:29 PMHi to all,
i've solved, is very simple using decode inside the select:
SELECT
ID,
FK_HTMLDB_ITEM, DECODE(FK_HTMLDB_ITEM,1,HTMLDB_ITEM.DATE_POPUP(3,rownum,VAL,'dd-mon-yyyy'),2,HTMLDB_ITEM.TEXT(3,VAL)) VALORE
FROM TESTID
my table is:
CREATE TABLE "DEV"."TESTID"
( "ID" NUMBER NOT NULL ENABLE,
"FK_HTMLDB_ITEM" NUMBER,
"VAL" VARCHAR2(4000 BYTE))
Bye Bye -
JTable sorting - problem when adding elements (complete code inside)
I�m writing this email with reference to a recent posting here but this time with the code example. (I apologize for the duplicated posting � this time it will be with the code)
Problem: when adding more elements to the JTable (sorted) the exception: ArrayIndexOutOfBoundsException is thrown.
Example: If the elements in the table are 10 and then the user requests for 8 � the table will produce the correct result. However, if the user will ask for 11 items (>10) the exception will be thrown.
The program: The program below (compiles and running). A JTable is constructed with 3 items, when you click the button - the return result should be 4 items - this will generate the error, WHY?
I would highly appreciate your thoughts why this is happening and most importantly � how to fix it.
Thanks a lot
3 files:
(1) TableSorterDemo
(2) Traveler
(3)TableSorter
//TableSorterDemo:
package sorter;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
* TableSorterDemo is like TableDemo, except that it
* inserts a custom model -- a sorter -- between the table
* and its data model. It also has column tool tips.
public class TableSorterDemo implements ActionListener
private JPanel superPanel;
private JButton clickMe = new JButton("click me to get diff data");
private boolean DEBUG = false;
private DefaultListModel defaultListModel;
private JTable table;
public TableSorterDemo()
superPanel = new JPanel(new BorderLayout());
defaultListModel = new DefaultListModel();
init1();
TableSorter sorter = new TableSorter(new MyTableModel(defaultListModel)); //ADDED THIS
table = new JTable(sorter); //NEW
sorter.setTableHeader(table.getTableHeader()); //ADDED THIS
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
//Set up tool tips for column headers.
table.getTableHeader().setToolTipText(
"Click to specify sorting; Control-Click to specify secondary sorting");
//Create the scroll pane and add the table to it.
JScrollPane scrollPane = new JScrollPane(table);
//Add the scroll pane to this panel.
superPanel.add("Center", scrollPane);
superPanel.add("South",clickMe);
clickMe.addActionListener(this);
public JPanel getPanel()
return superPanel;
public void init1()
//in real life this will be done from the db
Traveler a = new Traveler();
Traveler b = new Traveler();
Traveler c = new Traveler();
a.setFirstName("Elvis");
a.setLastName("Presley");
a.setSprot("Ping Pong");
a.setNumYears(3);
a.setVegetarian(true);
b.setFirstName("Elton");
b.setLastName("John");
b.setSprot("Soccer");
b.setNumYears(2);
b.setVegetarian(true);
c.setFirstName("shaquille");
c.setLastName("oneil");
c.setSprot("Golf");
c.setNumYears(22);
c.setVegetarian(true);
defaultListModel.addElement(a);
defaultListModel.addElement(b);
defaultListModel.addElement(c);
public void init2()
//in real life this will be done from the db
Traveler d = new Traveler();
Traveler e = new Traveler();
Traveler f = new Traveler();
Traveler g = new Traveler();
d.setFirstName("John");
d.setLastName("Smith");
d.setSprot("Tennis");
d.setNumYears(32);
d.setVegetarian(true);
e.setFirstName("Ron");
e.setLastName("Cohen");
e.setSprot("Baseball");
e.setNumYears(12);
e.setVegetarian(true);
f.setFirstName("Donald");
f.setLastName("Mac Novice");
f.setSprot("Vallyball");
f.setNumYears(1);
f.setVegetarian(true);
g.setFirstName("Eithan");
g.setLastName("Superstar");
g.setSprot("Vallyball");
g.setNumYears(21);
g.setVegetarian(true);
defaultListModel.addElement(d);
defaultListModel.addElement(e);
defaultListModel.addElement(f);
defaultListModel.addElement(g);
class MyTableModel extends AbstractTableModel
private DefaultListModel myModel;
public MyTableModel(DefaultListModel m)
myModel=m;
private String[] columnNames = {"First Name",
"Last Name",
"Sport",
"# of Years",
"Vegetarian"};
public int getColumnCount()
return columnNames.length;
public int getRowCount()
return myModel.size();
public String getColumnName(int column)
return getNames()[column];
public String[] getNames()
String[] names = {"First Name", "Last Name", "Sport", "# of Years", "Vegetarian"};
return names;
public Object getValueAt(int row, int col)
return distributeObjectsInTable(row, col, (Traveler) myModel.elementAt(row));
public Object distributeObjectsInTable(int row, int col, Traveler tr)
switch(col)
case 0:
return tr.getFirstName();
case 1:
return tr.getLastName();
case 2:
return tr.getSprot();
case 3:
return new Integer(tr.getNumYears());
case 4:
return new Boolean (tr.isVegetarian());
default:
return "Error";
public Class getColumnClass(int c)
return getValueAt(0, c).getClass();
private static void createAndShowGUI()
//Make sure we have nice window decorations.
JFrame.setDefaultLookAndFeelDecorated(true);
//Create and set up the window.
JFrame frame = new JFrame("TableSorterDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Create and set up the content pane.
TableSorterDemo newContentPane = new TableSorterDemo();
newContentPane.getPanel().setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane.getPanel());
//Display the window.
frame.pack();
frame.setVisible(true);
public static void main(String[] args)
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable()
public void run()
createAndShowGUI();
public void actionPerformed(ActionEvent ae)
if (ae.getSource()==clickMe)
defaultListModel.removeAllElements();
init2(); //if the size of the model was less than 2 items - the result will be ok.
//in other words, if you commens the last 2 rows of this method (addElement(f) & g)
// the result will be fine.
table.updateUI();
}//(2) Traveler
package sorter;
public class Traveler
private String firstName;
private String lastName;
private String sprot;
private int numYears;
private boolean vegetarian;
public String getFirstName()
return firstName;
public String getLastName()
return lastName;
public int getNumYears()
return numYears;
public String getSprot()
return sprot;
public boolean isVegetarian()
return vegetarian;
public void setFirstName(String firstName)
this.firstName = firstName;
public void setLastName(String lastName)
this.lastName = lastName;
public void setNumYears(int numYears)
this.numYears = numYears;
public void setSprot(String sprot)
this.sprot = sprot;
public void setVegetarian(boolean vegetarian)
this.vegetarian = vegetarian;
}//(3)TableSorter
package sorter;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.util.List;
import javax.swing.*;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.*;
public class TableSorter extends AbstractTableModel {
protected TableModel tableModel;
public static final int DESCENDING = -1;
public static final int NOT_SORTED = 0;
public static final int ASCENDING = 1;
private static Directive EMPTY_DIRECTIVE = new Directive(-1, NOT_SORTED);
public static final Comparator COMPARABLE_COMAPRATOR = new Comparator() {
public int compare(Object o1, Object o2) {
return ((Comparable) o1).compareTo(o2);
public static final Comparator LEXICAL_COMPARATOR = new Comparator() {
public int compare(Object o1, Object o2) {
return o1.toString().compareTo(o2.toString());
private Row[] viewToModel;
private int[] modelToView;
private JTableHeader tableHeader;
private MouseListener mouseListener;
private TableModelListener tableModelListener;
private Map columnComparators = new HashMap();
private List sortingColumns = new ArrayList();
public TableSorter() {
this.mouseListener = new MouseHandler();
this.tableModelListener = new TableModelHandler();
public TableSorter(TableModel tableModel) {
this();
setTableModel(tableModel);
public TableSorter(TableModel tableModel, JTableHeader tableHeader) {
this();
setTableHeader(tableHeader);
setTableModel(tableModel);
private void clearSortingState() {
viewToModel = null;
modelToView = null;
public TableModel getTableModel() {
return tableModel;
public void setTableModel(TableModel tableModel) {
if (this.tableModel != null) {
this.tableModel.removeTableModelListener(tableModelListener);
this.tableModel = tableModel;
if (this.tableModel != null) {
this.tableModel.addTableModelListener(tableModelListener);
clearSortingState();
fireTableStructureChanged();
public JTableHeader getTableHeader() {
return tableHeader;
public void setTableHeader(JTableHeader tableHeader) {
if (this.tableHeader != null) {
this.tableHeader.removeMouseListener(mouseListener);
TableCellRenderer defaultRenderer = this.tableHeader.getDefaultRenderer();
if (defaultRenderer instanceof SortableHeaderRenderer) {
this.tableHeader.setDefaultRenderer(((SortableHeaderRenderer) defaultRenderer).tableCellRenderer);
this.tableHeader = tableHeader;
if (this.tableHeader != null) {
this.tableHeader.addMouseListener(mouseListener);
this.tableHeader.setDefaultRenderer(
new SortableHeaderRenderer(this.tableHeader.getDefaultRenderer()));
public boolean isSorting() {
return sortingColumns.size() != 0;
private Directive getDirective(int column) {
for (int i = 0; i < sortingColumns.size(); i++) {
Directive directive = (Directive)sortingColumns.get(i);
if (directive.column == column) {
return directive;
return EMPTY_DIRECTIVE;
public int getSortingStatus(int column) {
return getDirective(column).direction;
private void sortingStatusChanged() {
clearSortingState();
fireTableDataChanged();
if (tableHeader != null) {
tableHeader.repaint();
public void setSortingStatus(int column, int status) {
Directive directive = getDirective(column);
if (directive != EMPTY_DIRECTIVE) {
sortingColumns.remove(directive);
if (status != NOT_SORTED) {
sortingColumns.add(new Directive(column, status));
sortingStatusChanged();
protected Icon getHeaderRendererIcon(int column, int size) {
Directive directive = getDirective(column);
if (directive == EMPTY_DIRECTIVE) {
return null;
return new Arrow(directive.direction == DESCENDING, size, sortingColumns.indexOf(directive));
private void cancelSorting() {
sortingColumns.clear();
sortingStatusChanged();
public void setColumnComparator(Class type, Comparator comparator) {
if (comparator == null) {
columnComparators.remove(type);
} else {
columnComparators.put(type, comparator);
protected Comparator getComparator(int column) {
Class columnType = tableModel.getColumnClass(column);
Comparator comparator = (Comparator) columnComparators.get(columnType);
if (comparator != null) {
return comparator;
if (Comparable.class.isAssignableFrom(columnType)) {
return COMPARABLE_COMAPRATOR;
return LEXICAL_COMPARATOR;
private Row[] getViewToModel() {
if (viewToModel == null) {
int tableModelRowCount = tableModel.getRowCount();
viewToModel = new Row[tableModelRowCount];
for (int row = 0; row < tableModelRowCount; row++) {
viewToModel[row] = new Row(row);
if (isSorting()) {
Arrays.sort(viewToModel);
return viewToModel;
public int modelIndex(int viewIndex)
return getViewToModel()[viewIndex].modelIndex;
private int[] getModelToView()
if (modelToView == null) {
int n = getViewToModel().length;
modelToView = new int[n];
for (int i = 0; i < n; i++) {
modelToView[modelIndex(i)] = i;
return modelToView;
// TableModel interface methods
public int getRowCount() {
return (tableModel == null) ? 0 : tableModel.getRowCount();
public int getColumnCount() {
return (tableModel == null) ? 0 : tableModel.getColumnCount();
public String getColumnName(int column) {
return tableModel.getColumnName(column);
public Class getColumnClass(int column) {
return tableModel.getColumnClass(column);
public boolean isCellEditable(int row, int column) {
return tableModel.isCellEditable(modelIndex(row), column);
public Object getValueAt(int row, int column) {
return tableModel.getValueAt(modelIndex(row), column);
public void setValueAt(Object aValue, int row, int column) {
tableModel.setValueAt(aValue, modelIndex(row), column);
// Helper classes
private class Row implements Comparable {
private int modelIndex;
public Row(int index) {
this.modelIndex = index;
public int compareTo(Object o) {
int row1 = modelIndex;
int row2 = ((Row) o).modelIndex;
for (Iterator it = sortingColumns.iterator(); it.hasNext();) {
Directive directive = (Directive) it.next();
int column = directive.column;
Object o1 = tableModel.getValueAt(row1, column);
Object o2 = tableModel.getValueAt(row2, column);
int comparison = 0;
// Define null less than everything, except null.
if (o1 == null && o2 == null) {
comparison = 0;
} else if (o1 == null) {
comparison = -1;
} else if (o2 == null) {
comparison = 1;
} else {
comparison = getComparator(column).compare(o1, o2);
if (comparison != 0) {
return directive.direction == DESCENDING ? -comparison : comparison;
return 0;
private class TableModelHandler implements TableModelListener {
public void tableChanged(TableModelEvent e) {
// If we're not sorting by anything, just pass the event along.
if (!isSorting()) {
clearSortingState();
fireTableChanged(e);
return;
// If the table structure has changed, cancel the sorting; the
// sorting columns may have been either moved or deleted from
// the model.
if (e.getFirstRow() == TableModelEvent.HEADER_ROW) {
cancelSorting();
fireTableChanged(e);
return;
// We can map a cell event through to the view without widening
// when the following conditions apply:
// a) all the changes are on one row (e.getFirstRow() == e.getLastRow()) and,
// b) all the changes are in one column (column != TableModelEvent.ALL_COLUMNS) and,
// c) we are not sorting on that column (getSortingStatus(column) == NOT_SORTED) and,
// d) a reverse lookup will not trigger a sort (modelToView != null)
// Note: INSERT and DELETE events fail this test as they have column == ALL_COLUMNS.
// The last check, for (modelToView != null) is to see if modelToView
// is already allocated. If we don't do this check; sorting can become
// a performance bottleneck for applications where cells
// change rapidly in different parts of the table. If cells
// change alternately in the sorting column and then outside of
// it this class can end up re-sorting on alternate cell updates -
// which can be a performance problem for large tables. The last
// clause avoids this problem.
int column = e.getColumn();
if (e.getFirstRow() == e.getLastRow()
&& column != TableModelEvent.ALL_COLUMNS
&& getSortingStatus(column) == NOT_SORTED
&& modelToView != null) {
int viewIndex = getModelToView()[e.getFirstRow()];
fireTableChanged(new TableModelEvent(TableSorter.this,
viewIndex, viewIndex,
column, e.getType()));
return;
// Something has happened to the data that may have invalidated the row order.
clearSortingState();
fireTableDataChanged();
return;
private class MouseHandler extends MouseAdapter {
public void mouseClicked(MouseEvent e) {
JTableHeader h = (JTableHeader) e.getSource();
TableColumnModel columnModel = h.getColumnModel();
int viewColumn = columnModel.getColumnIndexAtX(e.getX());
int column = columnModel.getColumn(viewColumn).getModelIndex();
if (column != -1) {
int status = getSortingStatus(column);
if (!e.isControlDown()) {
cancelSorting();
// Cycle the sorting states through {NOT_SORTED, ASCENDING, DESCENDING} or
// {NOT_SORTED, DESCENDING, ASCENDING} depending on whether shift is pressed.
status = status + (e.isShiftDown() ? -1 : 1);
status = (status + 4) % 3 - 1; // signed mod, returning {-1, 0, 1}
setSortingStatus(column, status);
private static class Arrow implements Icon {
private boolean descending;
private int size;
private int priority;
public Arrow(boolean descending, int size, int priority) {
this.descending = descending;
this.size = size;
this.priority = priority;
public void paintIcon(Component c, Graphics g, int x, int y) {
Color color = c == null ? Color.GRAY : c.getBackground();
// In a compound sort, make each succesive triangle 20%
// smaller than the previous one.
int dx = (int)(size/2*Math.pow(0.8, priority));
int dy = descending ? dx : -dx;
// Align icon (roughly) with font baseline.
y = y + 5*size/6 + (descending ? -dy : 0);
int shift = descending ? 1 : -1;
g.translate(x, y);
// Right diagonal.
g.setColor(color.darker());
g.drawLine(dx / 2, dy, 0, 0);
g.drawLine(dx / 2, dy + shift, 0, shift);
// Left diagonal.
g.setColor(color.brighter());
g.drawLine(dx / 2, dy, dx, 0);
g.drawLine(dx / 2, dy + shift, dx, shift);
// Horizontal line.
if (descending) {
g.setColor(color.darker().darker());
} else {
g.setColor(color.brighter().brighter());
g.drawLine(dx, 0, 0, 0);
g.setColor(color);
g.translate(-x, -y);
public int getIconWidth() {
return size;
public int getIconHeight() {
return size;
private class SortableHeaderRenderer implements TableCellRenderer {
private TableCellRenderer tableCellRenderer;
public SortableHeaderRenderer(TableCellRenderer tableCellRenderer) {
this.tableCellRenderer = tableCellRenderer;
public Component getTableCellRendererComponent(JTable table,
Object value,
boolean isSelected,
boolean hasFocus,
int row,
int column) {
Component c = tableCellRenderer.getTableCellRendererComponent(table,
value, isSelected, hasFocus, row, column);
if (c instanceof JLabel) {
JLabel l = (JLabel) c;
l.setHorizontalTextPosition(JLabel.LEFT);
int modelColumn = table.convertColumnIndexToModel(column);
l.setIcon(getHeaderRendererIcon(modelColumn, l.getFont().getSize()));
return c;
private static class Directive {
private int column;
private int direction;
public Directive(int column, int direction) {
this.column = column;
this.direction = direction;
}The table listens to the TableModel for changes. Changing the table by adding/removing
rows or columns has no affect on its table model. If you make changes to the table model
the table will be notified by its TableModelListener and change its view. So tell
MyTableModel about the change of data:
public class TableSorterDemo implements ActionListener
MyTableModel tableModel;
public TableSorterDemo()
defaultListModel = new DefaultListModel();
init1();
tableModel = new MyTableModel(defaultListModel);
TableSorter sorter = new TableSorter(tableModel);
public void actionPerformed(ActionEvent ae)
if (ae.getSource()==clickMe)
defaultListModel.removeAllElements();
init2();
tableModel.fireTableStructureChanged();
} -
I have a table with some entries. The table is a sortable one. I use the standard TableMap.java and TableSorter.java for sorting. The initialisation part consists of the following lines:
TableSorter sorter = new TableSorter(myTblModel);
JTable table = new JTable(sorter);
The problem I have is when I sort the table using the table column header, the rows gets sorted properly. However when I use getValueAt method to retrieve an object at a specified location, it always returns the object that was there before sorting. I dont know where am I going wrong? Can anyone help me please?
TIA,
SatishCheck out the link shown below:
http://forum.java.sun.com/thread.jsp?forum=57&thread=410651&tstart=0&trange=30
;o)
V.V.
PS: whatever you did that causes the result to be what you described could be an accidental discovery of a new technique! -
JTable sorting in 1.5 using AbstractTableModel
Hi,
I have a JTable with 7 columns, that uses AbstractTableModel. The Jtable is updated with contents from xml file. I have heard 1.6 provides classes that makes sorting easier, but I need to implement this using 1.5. Could any one provide a sample code for this requirement.
Regards,
ArunagiriHere is a link to the old 1.5 Swing tutorial. The section on How to Use Tables, includes code for the old way to sort columns in a table.
[https://www.cs.auckland.ac.nz/references/java/java1.5/tutorial/uiswing/TOC.html]
Maybe you are looking for
-
T430s fingerprint reader fails in both windows 7 (64 bit) and ubuntu.
Hi, I have 4 months with my new t430s, and so far so good, I created a partition to instal ubuntu and I was able to have the finger print reader work in it. The last week I left the laptop's battery to drain completely, but I did not notice it... I
-
I've created a PDF form with a submit button to collect data. The form works fine by it self, however I'm not able to get the form to work on the website. The form appears and will allow you to fill in the blanks but when you click submit.... noth
-
How can I use an RSS feed in my course?
The University System of Georgia goes to considerable effort to provide its 36 institutions with a content management system that auto-generates RSS feeds, including iTunes U-specific tags. We use it to feed content to our iTunes U public sites as w
-
Invoice difference while posting with different currencies
Hi, The PO has quantity 4.The net price is 28,976.45 SEK.i have done the GR.Now,i am changing the currency EUR in conditions tab of PO.The exchange rate is 0.85176.The amount will be 2964. while doing MIRO with currency EUR,the amount in the header s
-
Customize the changes in pricing as per the SAP for Domestic and Import
HI FRIENDS , To customize the changes in pricing as per the SAP for Domestic and Import Material cycle how to handle it , thanks samal