Restricting column entries in jtable

hi i have a problem here. I am developing a Database Filter. I use JTable to accept parameters for sql functions like ltrim. rtrim, etc . Each function forms a colum header. I want to restrict entry in rtrim column if ltrim is already selected in that row. Can any one help how to go about it.

Are the numeric values really numeric values? If you put them as strings in your tablemodel, the tablesorter will sort them as strings. If you put them as numbers (Integer, Float, Double, Long), they are sorted by numerical value.

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How to fix the value of first column in the JTable in java swing for every

Hi ,
I have a swing page that have table panel in which there is a table of size 7x4 now when I click on the perticulat row then that row data will displayin the table like that the selected row become the second column in the new table and the fist column of this table will remain constant for all the entry but the second column update according to the roe which is selected .How it is possible .
Thanks in Advace,
anu

One thing you can do is to prevent the user from editing that column and programatically supply the values of that column yourself.
JTable table = new JTable() {
   public boolean isCellEditable(int row, int col) {
       if(col == 0) {
          return false;
       return super.isCellEditable(row, col);
};This allows you to prevent the user from editing the column information so you can supply some sort of a default value for the column always
ICE

Can i stop the columns in a JTable from re-ordering?

Hi,
As we know, JTable by default allows re-ordering of the columns within it.
I mean to say that the columns in a JTable can be interchanged, by drag and drop utility.
I want to refrain my JTable from doing so.
Can someone please suggest me how can i do this?
Thanx in advance :)
Regards,
Archana

Thank you :)
This did solve my problem of columns getting re-ordered in my JTable.
But i am facing one more problem now :(
I sort my JTable by clicking on the JTableHeader.
Clicking on the column header of any one of the columns of the JTable, sorts all entries in either ascending or descending order.
This is not happening.:(
Can someone please help me out?
Thanx in advance :)
Regards,
Archana

How to get all the values in one column of a JTable

How to get all the values in one column of a JTable as a Collection of String.
I don;t want to write a for loop to say getValueAt(row, 1) eg for 2nd column.

I don;t want to write a for loop to say getValueAt(row, 1) eg for 2nd column. You could always write a custom TableModel that stores the data in the format you want it. It would probably be about 50 lines of code. Or you could write a loop in 3 lines of code. I'll let you decide which approach you want to take.

Restricting data entry to a particular language in the form

Hi,
I created a multilingual form in which all the fields of the form are in a particular language . Now am trying to restrict data entry in the form to that language at the client side only . Say if it is a form in french, can we restrict the data entry to french only . The approach i was trying to implement was adding a script against the change event of all data fields and see if the characters lie in the range of the language unicode character set . But have not been successful in it yet . Can anybody help me find some way or provide any sample for it ?
Thanks

Hello, I'm German
Probably you can restrict the characters used for text entry, so for example ü is allowed in the German form but not in French.
But you will NEVER be able to restrict the users staying only writing French in French forms 100%.
1) You sometimes, not often, do encounter letters that are not typical for the language. (Though it can appear in any kind of word, it's quite regular for names.)
2) Let's say I fill the French form. I encounter a problem when I type in the word "Müller". This word wouldn't be French at all. The text will be delted and probably given an error message. Well... I learn out of this error message. Next time I'll type Mueller. ^^
(I knew several pages were people were restricted to talk English by forbidding letters that were not used in English very often... That didn't stop us violating that rule. The only error that really bugged us wasn't the restriction in not using letters that don't exist in English but the "please don't swear or insult so." error that kept appearing for ex. when we used the German word for "that" (= "dass"). They just didn't like the last 3 letters.)
3) Many countries have the same or include other countries unicodes. For example English could be written in the German form or in the French form.
4) You can't get out the syslanguage as far as I know. This would be a great hint which language the person is using.
5) I don't think you can use the spellcheck in any way... great violation against spellchecking could also be a hint for another language.
I know a quite big internetcommunity which did try to accomplish the same as you do. After about 2 years and a lot of experiments they stopped their efforts and were content by popping up the random error-messages warning that you don't have to insult, just like those other communities mentioned above. ^^ (Though they tried to restrict the insulting parts to the language used that didn't work out. Too many people knew how to insult in other languages ;D or which words were similar to insults.)
People just never do what they are supposed to do and are quite nasty finding workarounds...
My advice to you would be:
Don't make the effort.
Sorry for not being able to provide you with a solution, but the opposite.
Lisa

Is it possible to change the datatype of the Restricted Column?

Hi,
1. I created a Analytic View, and in the Analytic view applied the retricted Column.
    I have restricted the column SALES REVENUE(Measure) based on the Attribute Column Country.
    Have checkedin Include. When i validate the process, I get an error as -
   "The aggregation type FORMULA can not be applied on calculated column RC_SALES of data type CHAR"
    Here RC_SALES is my Restricted Column and not Calculated Column, but in the errors it shows vice versa.
2. Is it possible to change the data type of the Restricted Column. If so, where should i change it, I have tried in the Properties pane and also i have
    tried within the semantics of the Analytic view. Within Semantic, the aggregation type is set as SUM by default.
Thanks and regards
Sanjay

Hi,
In SQL*Plus, you can set the width of a DATE column the same way you do it for a VARCHAR2.
COLUMN dateacquired FORMAT A12
SELECT SYSDATE AS dateacquired
FROM    dual;produces
DATEACQUIRED
29-JAN-09

How to restrict the entry of same material twice on the order

HI,
How to restrict the entry of same material twice on the order before saving the Order ?
I do not want my users to enter the same material as two different line items in the order.
Any inputs wud b appreciated

Hi Vam,
For this you need to take the help of an ABAPer . Ask him to modify the user exit and add the logic.
For user exit please go through the below link it will help you to resolve your issue.
http://help.sap.com/saphelp_46c/helpdata/en/1c/f62c7dd435d1118b3f0060b03ca329/content.htm
Regards,
Krishna O
Edited by: Krishna O on Jun 3, 2010 12:29 PM

How can I add custom right-click-menu to column headers in JTable?

Can anyone point me to a topic on how to customize a popup menu for column headers in JTable? Specifically, I want to add things like "auto-size column" and "hide column".
Thanks,
Matt

Right-click on your table. Then go to Advanced->Runtime Shortcut Menu->Edit.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines

How to create Hyperlink column in a JTable

Can anyone help in creating a hyperlink column in a JTable.
Thanks in advance,
Sridhar.

If the parent is an Applet it is very simple .
catch the mouse click on columns and execute the following code
String url = getValueAt(i,j);
getAppletContext().showDocument(new
URL(url ), "_blank");
thatz all .
if ur program is an application use this getRuntime.exec() and use parameters to rundll32.exe url and iexplore.exe in Windows platform,
if u have still doubts plz get back to me
Renjith K.V

Restrict duplicate entry

how to restrict duplicate entries to be entered in a table control...
thanx,
naveen vishal

hi..
after ur PAI table control loop, write another module.
in tht u can declare one temporary int table and copy the original int table to the temp table.
then sort this new internal table and delete adjacent duplicates comparing your key fields.
if sy-subrc = 0.
give some error msg.
else.
do nothing..
endif.
hope this helps...
regards,
naveen

Looking for component: flexible rows like columns in a JTable

Hello,
I need a swing component to display several rows which can be moved up and down, the height resized, interchanged with the mouse like the columns in a JTable. But there is no need for columns. I think there is no standard swing component.
Any ideas, resource hints?
Thanks, Ulrich

One more piece of advice. It is not very easy to get "pre-written custom components". Most developers do things to meet their own needs and these may not be exactly what you are looking for. The best thing to do is to try to develop this yourself. It will give you loads of experience and in later programmes you may write, based on the experience you obtained from the "pain-staking" development process you'll know how to go round these problems quicker and may be able to help others also.
So just start writing some stuff. You may end up finishing sooner than you think. And remember forum members are always ready to help with problems (accompanied by minimal code examples of the actual problem).
ICE

Help for adjusting columns of a JTAble in a Table Model

Hello community,
In order to have a good display of by DataBase in a JTable, I've wrote some code to adjust columns in function of datas. Those datas are displayed with a TableModel ( which I've declared in a class JDBCAdapter ).
When I start my application, I call adjustColumns(), and all is great but when I add information to my DB and display it, the columns of my JTable return to default width...
So I want to incorporate my function adjustColumns in my TableModel, and I need help...
     void adjustColumns()
     // Ajuste les colonnes aux donnes pour que tout soit visible
     int nbRow,nbCol;
     nbRow = JTable1.getRowCount();
     nbCol = test.getColumnCount();
     for ( int i = 0; i < nbCol; i++ )
     com.sun.java.swing.table.TableColumn column = null;
     column = JTable1.getColumnModel().getColumn(i);
     int dataLength = 0;
     for ( int j = 0; j< nbRow; j++ )
     FontMetrics fm;
     int dataLengthTmp;
     String valueTable;
     fm = JTable1.getFontMetrics(JTable1.getFont());
     if ( test.getValueAt(j, i) == null )
     System.out.println("Valeur nulle...");
     dataLengthTmp = 0;
     else
     valueTable = test.getValueAt(j, i).toString();
     dataLengthTmp = fm.stringWidth(valueTable);
     System.out.println(valueTable + " = " + dataLengthTmp);
     if ( dataLengthTmp > dataLength )
     dataLength = dataLengthTmp;
     if ( dataLength != 0 )
column.setWidth(dataLength + 5);
else
column.sizeWidthToFit();
JTable1.setModel(test);
JTable1.repaint();
import java.util.Vector;
import java.sql.*;
import com.sun.java.swing.table.AbstractTableModel;
import com.sun.java.swing.event.TableModelEvent;
public class JDBCAdapter extends AbstractTableModel {
Connection connection;
Statement statement;
ResultSet resultSet;
String[] columnNames = {};
Vector rows = new Vector();
ResultSetMetaData metaData;
public JDBCAdapter(String url, String driverName,
String user, String passwd) {
try {
Class.forName(driverName);
System.out.println("Ouverture de la connexion a la base de donnee...");
connection = DriverManager.getConnection(url, user, passwd);
statement = connection.createStatement();
catch (ClassNotFoundException ex) {
System.err.println("Cannot find the database driver classes.");
System.err.println(ex);
catch (SQLException ex) {
System.err.println("Cannot connect to this database.");
System.err.println(ex);
public void executeQuery(String query) {
if (connection == null || statement == null) {
System.err.println("There is no database to execute the query.");
return;
try {
resultSet = statement.executeQuery(query);
metaData = resultSet.getMetaData();
int numberOfColumns = metaData.getColumnCount();
columnNames = new String[numberOfColumns];
// Get the column names and cache them.
// Then we can close the connection.
for(int column = 0; column < numberOfColumns; column++) {
columnNames[column] = metaData.getColumnLabel(column+1);
// Get all rows.
rows = new Vector();
while (resultSet.next()) {
Vector newRow = new Vector();
for (int i = 1; i <= getColumnCount(); i++) {
newRow.addElement(resultSet.getObject(i));
rows.addElement(newRow);
// close(); Need to copy the metaData, bug in jdbc:odbc driver.
fireTableChanged(null); // Tell the listeners a new table has arrived.
catch (SQLException ex) {
System.err.println(ex+" query = "+query);
public void executeUpdate(String query) {
if (connection == null || statement == null) {
System.err.println("There is no database to execute the query.");
return;
try {
statement.executeUpdate(query);
// close(); Need to copy the metaData, bug in jdbc:odbc driver.
fireTableChanged(null); // Tell the listeners a new table has arrived.
catch (SQLException ex) {
System.err.println(ex+" query = "+query);
public void close() throws SQLException {
System.out.println("Fermeture de la connection a la base de donnee... Bye !");
resultSet.close();
statement.close();
connection.close();
protected void finalize() throws Throwable {
close();
super.finalize();
// Implementation of the TableModel Interface
// MetaData
public String getColumnName(int column) {
if (columnNames[column] != null) {
return columnNames[column];
} else {
return "";
public Class getColumnClass(int column) {
int type;
try {
type = metaData.getColumnType(column+1);
catch (SQLException e) {
return super.getColumnClass(column);
switch(type) {
case Types.CHAR:
case Types.VARCHAR:
case Types.LONGVARCHAR:
return String.class;
case Types.BIT:
return Boolean.class;
case Types.TINYINT:
case Types.SMALLINT:
case Types.INTEGER:
return Integer.class;
case Types.BIGINT:
return Long.class;
case Types.FLOAT:
case Types.DOUBLE:
return Double.class;
case Types.DATE:
return java.sql.Date.class;
default:
return Object.class;
public boolean isCellEditable(int row, int column) {
try {
return metaData.isWritable(column+1);
catch (SQLException e) {
return false;
public int getColumnCount() {
return columnNames.length;
// Data methods
public int getRowCount() {
return rows.size();
public Object getValueAt(int aRow, int aColumn) {
Vector row = (Vector)rows.elementAt(aRow);
return row.elementAt(aColumn);
public String dbRepresentation(int column, Object value) {
int type;
if (value == null) {
return "null";
try {
type = metaData.getColumnType(column+1);
catch (SQLException e) {
return value.toString();
switch(type) {
case Types.INTEGER:
case Types.DOUBLE:
case Types.FLOAT:
return value.toString();
case Types.BIT:
return ((Boolean)value).booleanValue() ? "1" : "0";
case Types.DATE:
return value.toString(); // This will need some conversion.
default:
return "\""+value.toString()+"\"";
public void setValueAt(Object value, int row, int column) {
try {
String tableName = metaData.getTableName(column+1);
// Some of the drivers seem buggy, tableName should not be null.
if (tableName == null) {
System.out.println("Table name returned null.");
String columnName = getColumnName(column);
String query =
"update "+tableName+
" set "+columnName+" = "+dbRepresentation(column, value)+
" where ";
// We don't have a model of the schema so we don't know the
// primary keys or which columns to lock on. To demonstrate
// that editing is possible, we'll just lock on everything.
for(int col = 0; col<getColumnCount(); col++) {
String colName = getColumnName(col);
if (colName.equals("")) {
continue;
if (col != 0) {
query = query + " and ";
query = query + colName +" = "+
dbRepresentation(col, getValueAt(row, col));
System.out.println(query);
System.out.println("Not sending update to database");
// statement.executeQuery(query);
catch (SQLException e) {
// e.printStackTrace();
System.err.println("Update failed");
Vector dataRow = (Vector)rows.elementAt(row);
dataRow.setElementAt(value, column);
Thanks to help me.

Hi,
OK. I have read your code sample again. It looks like the JDBCAdapter class is reloading table data in the executeQuery method. Why not call adjustColumns at the end of this method after the new rows and columns are loaded? Perhaps it also should be called at the end of executeUpdate. Have you tried doing that?
I would still set
JTable1.setAutoCreateColumnsFromModel (false); to prevent Java from readjusting the size automatically at some other time.
regards,
Terry

How to set a JRadioButton as a column in a JTable

Hello Friends,
I need a help in JTable.
I want to have a Radio button as a column of a JTable.(The Other Columns should be Strings).
The heading of the Column which has the RadioButton is "Select" which means that I can select only one radiobutton at a time.
Could you please give me a solution on this.
I would appreciate if u give me the code for this, as it is very urgent.
Thanks in Advance,
Regards,
Vijayakannan

Hi,
use a TableCellRenderer and CellEditor as described in http://java.sun.com/docs/books/tutorial/uiswing/components/table.html
Propably you need to track the selected button yourself, e.g. by using an int value representing the row selected.

Right Justify a column in a JTable

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I formatted a decimal number and want to put it into a column in a JTable. Unfortunately, the value is being left justified. How do I make the data for the column right justitified?

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Looking back at the tutorial, I now find that ImageIcon is supposed to be used for centering, but this didnt work. It wiped out the data for the column I tried to use it on rather than justifying it left or right. Any ideas how to get centering to work?

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table.getTableHeader().addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
/* some actions */
}

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Restricting column entries in jtable

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