Disable a Column in a JTable

hiya,
i have JTable, and with a button click, i want to make one of the Columns DISABLE not editable or not.
can i do that?
tx

read man,
i read the Tutorial more than 5 times. and i no what i ask.
if u wanna disable JList, this work with this code
jList1.setEnabeld(false);and to do that with the JTable??? u can do this also
jTable1.setEnabeld(false);but i want to effect only one column.
how to do that?
this Q is not answer in the Tutorial i am sure 100%
i think u have no idea what u talkin about, do u DrClap??
the right Q is, DiD you read teh Tutorial?

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How should I disable some columns in a JTable so that they cannot be edited at all? The methods provided do this but double clicking the column enables it.

Hi
i dont know whether u r using TableModel or not.
if ur using a customTableModel for ur entries ..
u can implement the following method of
Table Model Interface.
public boolean isCellEditable(int rowIndex,
int columnIndex)then implement in such a way that ..
compare always with ur column number and return false.
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int columnIndex){
if (columnIndex ==4 )
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else
return true;
}above code makes all cells in the col=4 uneditable.
even u rearrange the cols in table it works as per documentation.
test this .. and let me know whether u succeeded r not.
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http://java.sun.com/docs/books/tutorial/uiswing/components/table.html
~

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A custom table model makes this simple. You just override the isCellEditable method and return false when the column index is 0.

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This is the function that disable/enable cells in JTables.
Are you looking for this?
public boolean isCellEditable(int row, int col)
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if(row!=4&&col!=5)
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and what I gave you is only an example of what you can do with it.
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How to disable certain columns of a Table?

hi all,
I wish to fill a pattern of 8 digital signals (only 1's & 0's) in a Table.
Is there any way to restrict the user from typing char or num other than a 1 or a 0?
Since the table is a string, I'm having confusion how to do this.
Secondly, the table would have by default 12 columns visible on the Front Panel, excluding both the headers.
But the No. of Columns is based on a parameter called Duration that ranges between 4 & 256.
What I want the user to do is to key in 1's & 0's for the Duration chosen.
Since it'll be tedious to key in for large values of Duration, I've given the option of Set Row(s) & Reset Row(s),
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Is there any way to disable the remaining columns of the Table, ie, those unfilled columns,
when the user scrolls horizontally? I don't know how to achieve this.
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- Partha
LabVIEW - Wires that catch bugs!
Attachments:
Set Eventframe1.vi ‏409 KB

Another option is to do this:
Slightly more elegant, but also more potential for bugs (e.g. the users can tab into the column).
craigdobis wrote:
You can lower your overhead by using these "professional" looking indicators and controls. They are limited in functions and properties, thereby causing a smaller VI in file size.
Nice. I didn't think about that. Looks like a VI with a single system boolean takes ~20% less space than one with a standard boolean.
P.S. In general, I would say there are considerably better arguments for using system controls than memory issues.
Try to take over the world!
Attachments:
Disabled Column.png ‏5 KB

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 .
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anu

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};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

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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 ).
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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;
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String user, String passwd) {
try {
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connection = DriverManager.getConnection(url, user, passwd);
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catch (ClassNotFoundException ex) {
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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();
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columnNames = new String[numberOfColumns];
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for(int column = 0; column < numberOfColumns; column++) {
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rows = new Vector();
while (resultSet.next()) {
Vector newRow = new Vector();
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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.");
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try {
statement.executeUpdate(query);
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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

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