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Binding jtable from mysql database in netbeans

I have almost finished my project and I'm getting stuck with displaying the Data from my DB into a Jtable. I have searched and read and still can't get this to work. I'm not displaying any errors but when I run the code I get an error when I click on search for the data. I get
java.sql.SyntaxErrorException: Syntax error: Encountered "INVENTORY"
at line 1, column 9. Does that mean my code is fine and its a problem with my Database?
Here is my code.
private void cmdSEARCHINVActionPerformed(java.awt.event.ActionEvent evt) {
ResultSet rs = null;
try {
String host = "jdbc:derby://localhost:1527/The_Home_Place";
String uName = "Lynn";
String uPass = "Lynn";
Connection con = DriverManager.getConnection( host, uName, uPass );
Statement stmt = con.createStatement();
String Query = "SELECT *INVENTORY";
rs = stmt.executeQuery(Query);
ResultSetMetaData rsmt = rs.getMetaData();
int col = rsmt.getColumnCount();
Vector column = new Vector(col);
for(int i = 1; i <= col; i++)
{
column.add(rsmt.getColumnName(i));
}
Vector data = new Vector();
Vector row = new Vector();
while (rs.next());
{
row = new Vector(col);
for(int i = 1; i <= col; i++){
row.add(rs.getString(i));
}
data.add(row);
}
//Create the Table
JFrame frame = new JFrame();
frame.setSize(500,120);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel = new JPanel();
JTable table = new JTable(data,column);
JScrollPane jsp = new JScrollPane(table);
panel.setLayout(new BorderLayout());
panel.add(jsp,BorderLayout.CENTER);
frame.setContentPane(panel);
frame.setVisible(true);
}
catch (SQLException ex) {
JOptionPane.showMessageDialog(null, ex.toString());
}
}

Your SQL query has invalid syntax. Try changing it to
String query = "SELECT * FROM INVENTORY";
instead. Also, you shouldn't be using Vector anymore, because the class is obsolete; use an ArrayList<String> (a generic collection, not a raw one) for storing the row data instead.

get more rows in JTable java

I coded Auto Suggesting Combo boxes. Functionality is,
*when a user type the first letter in either combo box , data retrieves from the MySQL database and show in a popup list, when a user click on a suggested item ,then press Add button that item added to the J Table and clears the combo boxes
But when I select another item from the combo box and click Add button before added one disappears
*How can I keep Both or many items in the J Table according to above situation *
I'll post my code:
private void NamecomboActionPerformed(java.awt.event.ActionEvent evt) {
String drugname = (String) Namecombo.getSelectedItem();
try{
String name = "SELECT * FROM druginfo WHERE ItemName LIKE '"+drugname+"%'";
PreparedStatement pstmt = conn.prepareStatement(name);
ResultSet rs = pstmt.executeQuery();
while (rs.next()){
IDcombo.setSelectedItem(rs.getString("ItemID"));
}
}catch(Exception e){
JOptionPane.showMessageDialog(null,"error "+ e);
}
}
private void IDcomboActionPerformed(java.awt.event.ActionEvent evt) {
String drugid = (String) IDcombo.getSelectedItem();
try{
String name = "SELECT * FROM druginfo WHERE ItemID LIKE '"+drugid+"%'";
PreparedStatement pstmt = conn.prepareStatement(name);
ResultSet rs = pstmt.executeQuery();
while (rs.next()){
Namecombo.setSelectedItem(rs.getString("ItemName"));
}
}catch(Exception e){
JOptionPane.showMessageDialog(null,"error "+ e);
}
try{
String exp = "SELECT ExpDate FROM druginfo WHERE ItemID LIKE '"+drugid+"%'";
PreparedStatement pstmt = conn.prepareStatement(exp);
ResultSet rs2 = pstmt.executeQuery();
while (rs2.next()){
String date = rs2.getString("ExpDate");
exptxt.setText(date);
}
}catch(Exception e){
JOptionPane.showMessageDialog(null,"error "+ e);
}
}
add button action performed for adding item to JTable;
private void add_btnActionPerformed(java.awt.event.ActionEvent evt) {
String temp = (String) IDcombo.getSelectedItem();
String sql = "select ItemID,ItemName,CostPrice,InStock from druginfo where ItemID=?";
try {
pst=conn.prepareStatement(sql);
pst.setString(1, temp);
rs=pst.executeQuery();
tableSale.setModel(DbUtils.resultSetToTableModel(rs));
IDcombo.setSelectedItem(null);
Namecombo.setSelectedItem(null);
} catch (Exception ex) {
JOptionPane.showMessageDialog(null, ex);
}

Add the current selection(resultset data) to JTable object without replacing the old data.
rs=pst.executeQuery();
addDataToTable(tableSale,DbUtils.resultSetToTableModel(rs));
IDcombo.setSelectedItem(null);
Namecombo.setSelectedItem(null);
//ADD this method
public void addDataToTable(JTable table,TableModel model) {
DefaultTableModel tableModel = (DefaultTableModel) table.getModel();
DefaultTableModel resultSetModel = (DefaultTableModel) model;
for (int i = 0; i < resultSetModel.getRowCount(); i++) {
Vector row=new Vector();
for (int j = 0; j < resultSetModel.getColumnCount(); j++) {
row.addElement(resultSetModel.getValueAt(i, j));
}
tableModel.addRow(row);
}
tableModel.fireTableDataChanged();
}

This tableSale.setModel(DbUtils.resultSetToTableModel(rs)); will replace the old model with new model.So obviously datas will be lost.You have to add values to the existing model.I have added a snippet which will help you.
Replace tableSale.setModel(DbUtils.resultSetToTableModel(rs)); with addValuesToModel(DbUtils.resultSetToTableModel(rs));
addValuesToModel(DbUtils.resultSetToTableModel(rs));
public void addValuesToModel(TableModel resultModel) {
DefaultTableModel tmodel = (DefaultTableModel) tableSale.getModel();
DefaultTableModel rmodel = (DefaultTableModel) resultModel;
for (int i = 0; i < rmodel.getRowCount(); i++) {
Object[] row = new Object[rmodel.getColumnCount()];
for (int j = 0; j < rmodel.getColumnCount(); j++) {
row[j] = rmodel.getValueAt(i, j);
}
tmodel.addRow(row);
}
}

Insert data to MySQL table from JTable in Java GUI

I've made a GUI in Java that connects with a MySQL server and inserts,deletes,updates data. I have a section on this GUI that you can write in a text area a MySQL query and the result is displayed on a Jtable. Everything works fine! I can print the data from the JTable or save them to a text file!
Now, I want to add another feature: When I double click on a specific cell, I would like to change the data of the JTable, and I want this data to be updated in the MySQL table with the click of a button as well.
I've searched all over the internet, but I can't find a good example or a good solution. The JTable I have is dynamic; that means that what ever query is inserted the data will be displayed with the quired column names and data
Here is the code:
ArrayList columnNames = new ArrayList();
ArrayList data = new ArrayList();
data_connector getdata1 = new data_connector();
host = getdata1.getHost();
username = getdata1.getUsername();
password1 = getdata1.getPassword();
mysql_command = getdata1.getMysql_command();
command_name = getdata1.getCommand_name();
setTitle(command_name);
// Connect to an MySQL Database, run query, get result set
String url = "jdbc:mysql://"+host+":3306/xxxxx";
String userid = username;
String password = password1;
String sql = mysql_command;
// Java SE 7 has try-with-resources
// This will ensure that the sql objects are closed when the program
// is finished with them
try (Connection connection = DriverManager.getConnection( url, userid, password );
Statement stmt = connection.createStatement();
ResultSet rs = stmt.executeQuery( sql ))
{
ResultSetMetaData md = rs.getMetaData();
int columns = md.getColumnCount();
// Get column names
for (int i = 1; i <= columns; i++)
columnNames.add(md.getColumnName(i));
// Get row data
while (rs.next())
{
ArrayList row = new ArrayList(columns);
for (int i = 1; i <= columns; i++)
row.add(rs.getObject(i));
data.add(row);
}
}
catch (SQLException e)
{
System.out.println(e.getMessage());
JOptionPane.showMessageDialog(null, e.getMessage());
mysql_fail_flag = 1;
}
// Create Vectors and copy over elements from ArrayLists to them
// Vector is deprecated but I am using them in this example to keep
// things simple - the best practice would be to create a custom defined
// class which inherits from the AbstractTableModel class
Vector columnNamesVector = new Vector();
Vector dataVector = new Vector();
for (int i = 0; i < data.size(); i++)
{
ArrayList subArray = (ArrayList)data.get(i);
Vector subVector = new Vector();
for (int j = 0; j < subArray.size(); j++)
subVector.add(subArray.get(j));
dataVector.add(subVector);
}
for (int i = 0; i < columnNames.size(); i++ )
columnNamesVector.add(columnNames.get(i));
contentPane.setLayout(null);
// Create table with database data
table = new JTable(dataVector, columnNamesVector)
{
public Class getColumnClass(int column)
{
for (int row = 0; row < getRowCount(); row++)
{
Object o = getValueAt(row, column);
if (o != null)
return o.getClass();
}
return Object.class;
}
};
// table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
JScrollPane scrollPane = new JScrollPane(table);
scrollPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
scrollPane.setBounds(5, 5, xframeWidth-20, yframeHeight-70);
getContentPane().add(scrollPane);
JPanel buttonPanel = new JPanel();
buttonPanel.setBounds(5, 856, 1574, 1);
getContentPane().add(buttonPanel);
buttonPanel.setLayout(null);

In the form you actually create your JTable, I don't think this is easy. What you want to do is subclassing AbstractTableModel, and overwrite the setValueAt() method. You subclass could look like this:
class MyModel extends AbstractTableModel
{
private ResultSet result;
private ResultSetMetaData metadata;
public MyModel (ResultSet rs)
{
super();
result = rs; // mustn't be null, maybe check and throw NPE
metadata = result.getMetaData();
}
public int getRowCount ()
{
result.last();
return result.getRow(); // See http://stackoverflow.com/questions/8292256/get-number-of-rows-returned-by-resultset-in-java
}
public int getColumnCount ()
{
return metadata.getColumnCount();
}
public Object getValueAt (int row, int col)
{
result.absolute(row);
return result.getString(col);
}
public String getColumnName (int col)
{
return metadata.getColumnName(col);
}
public void setValueAt (Object value, int row, int col)
{
result.absolute(row);
result.updateObject(col, value);
}
}
I haven't tested it, but your code must look like this. Note that you mustn't close the Statement, Connection or the ResultSet (or create a new ResultSet cause some db drivers like MySQL destroy the old one) to prevent any Exceptions.

OK!!! i managed to update every cell separately by just editing the cell and then pressing enter!
This works only for 1 table but its ok for my project! Here is the code...
private class RowColumnListSelectionListener implements ListSelectionListener {
public void valueChanged(ListSelectionEvent e) {
rowIndexStart = table.getSelectedRow();
rowIndexEnd = table.getSelectionModel().getMaxSelectionIndex();
colIndexStart = table.getSelectedColumn();
colIndexEnd = table.getColumnModel().getSelectionModel().getMaxSelectionIndex();
for ( i = rowIndexStart; i <= rowIndexEnd; i++) {
for ( j = colIndexStart; j <= colIndexEnd; j++) {
Object cell_value = table.getValueAt(i,j);
Cell_value_string_before = (String) cell_value;
}
}
}
}
public test_table() {
setIconImage(Toolkit.getDefaultToolkit().getImage(test_table.class.getResource("/com/sun/java/swing/plaf/windows/icons/Computer.gif")));
//setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//setBounds(100, 100, 688, 589);
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
xframeWidth = screenSize.width; //dynamic size for frame x-axes
yframeHeight = screenSize.height; //dynamic size for frame y-axes
int xlocation = xframeWidth*2; //dynamic location x-axes
int ylocation = yframeHeight*2; //dynamic location y-axes
setBounds(0,0, xframeWidth, yframeHeight);
setResizable(false);
JMenuBar menuBar = new JMenuBar();
setJMenuBar(menuBar);
JMenu mnNewMenu = new JMenu("Αρχείο");
menuBar.add(mnNewMenu);
JMenuItem mntmNewMenuItem_1 = new JMenuItem("Εξαγωγή σε .txt αρχείο");
mntmNewMenuItem_1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JFileChooser fileChooser =new JFileChooser();
fileChooser.setDialogTitle("Δημιουργία αρχείου .txt");
FileNameExtensionFilter filter = new FileNameExtensionFilter(".txt", "text");
fileChooser.setFileFilter(filter);
int returnVal = fileChooser.showSaveDialog(null);
if (returnVal == JFileChooser.APPROVE_OPTION) {
try {
File file = fileChooser.getSelectedFile();
File newfile = new File(file.getPath()+".txt");
// PrintWriter os = new PrintWriter(file);
FileWriter fw = new FileWriter(newfile,true); //filewriter
BufferedWriter bw = new BufferedWriter(fw); //buffered writer
PrintWriter os = new PrintWriter(bw, true);
os.print("");
for (int col = 0; col < table.getColumnCount(); col++) {
os.print(table.getColumnName(col) + "\t");
os.print(";");
}
os.println("");
os.println("");
for (int row = 0; row < table.getRowCount(); row++) {
for (int col = 0; col < table.getColumnCount(); col++) {
//os.print(table.getColumnName(col) + "\t");
// os.print(": ");
os.print(table.getValueAt(row, col) + "\t");
os.print(";");
// os.print(table.getRowCount() + "\t");
}
os.println("");
}
os.close();
System.out.println("Done!");
}
catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
}
});
mnNewMenu.add(mntmNewMenuItem_1);
JMenuItem mntmNewMenuItem_2 = new JMenuItem("Εκτύπωση");
mntmNewMenuItem_2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
try {
if (! table.print()) {
System.err.println("User cancelled printing");
}
} catch (java.awt.print.PrinterException e1) {
System.err.format("Cannot print %s%n", e1.getMessage());
}
}
});
mnNewMenu.add(mntmNewMenuItem_2);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
ArrayList columnNames = new ArrayList();
ArrayList data = new ArrayList();
// data_connector getdata1 = new data_connector();
// host = getdata1.getHost();
// username = getdata1.getUsername();
// password1 = getdata1.getPassword();
// mysql_command = getdata1.getMysql_command();
// command_name = getdata1.getCommand_name();
//setTitle(command_name);
// Connect to an MySQL Database, run query, get result set
String url = "jdbc:mysql://localhost:3306/υπαλληλοι απε-μπε";
String userid = "ziorange";
String password = "120736";
String sql = "SELECT * FROM `ΥΠΑΛΛΗΛΟΙ 2 test`";
//String sql = "SELECT `ΚΩΔΙΚΟΣ`,`ΕΠΩΝΥΜΟ`,`ΟΝΟΜΑ`,`ΟΝΟΜΑ ΠΑΤΡΟΣ`,`ΑΜΚΑ`,`ΑΡΙΘΜΟΣ ΜΗΤΡΩΟΥ ΙΚΑ (αν υπάρχει)` FROM `ΥΠΑΛΛΗΛΟΙ 2` WHERE `ΚΩΔΙΚΟΣ`>'0' AND `ΗΜΕΡΟΜΗΝΙΑ ΑΠΟΧΩΡΗΣΗΣ`>'2009-12-31 00:00:00' OR `ΕΙΔΙΚΟΤΗΤΑ` !='ΑΝΤΑΠΟΚΡΙΤΗΣ ΕΞ' AND `ΛΟΓΟΣ ΑΠΟΧΩΡΗΣΗΣ`='-' ORDER BY `ΕΠΩΝΥΜΟ`";
// Java SE 7 has try-with-resources
// This will ensure that the sql objects are closed when the program
// is finished with them
try
{
connection = DriverManager.getConnection( url, userid, password );
Statement stmt = connection.createStatement();
ResultSet rs = stmt.executeQuery( sql );
ResultSetMetaData md = rs.getMetaData();
int columns = md.getColumnCount();
// Get column names
for (int i = 1; i <= columns; i++)
{
columnNames.add( md.getColumnName(i) );
}
// Get row data
while (rs.next())
{
ArrayList row = new ArrayList(columns);
for (int i = 1; i <= columns; i++)
{
row.add( rs.getObject(i) );
}
data.add( row );
}
}
catch (SQLException e)
{
//
System.out.println( e.getMessage() );
JOptionPane.showMessageDialog(null, e.getMessage() );
mysql_fail_flag=1;
}
// Create Vectors and copy over elements from ArrayLists to them
// Vector is deprecated but I am using them in this example to keep
// things simple - the best practice would be to create a custom defined
// class which inherits from the AbstractTableModel class
Vector columnNamesVector = new Vector();
Vector dataVector = new Vector();
for (int i = 0; i < data.size(); i++)
{
ArrayList subArray = (ArrayList)data.get(i);
Vector subVector = new Vector();
for (int j = 0; j < subArray.size(); j++)
{
subVector.add(subArray.get(j));
}
dataVector.add(subVector);
}
for (int i = 0; i < columnNames.size(); i++ )
columnNamesVector.add(columnNames.get(i));
contentPane.setLayout(null);
// Create table with database data
table = new JTable(dataVector, columnNamesVector)
{
public Class getColumnClass(int column)
{
for (int row = 0; row < getRowCount(); row++)
{
Object o = getValueAt(row, column);
if (o != null)
{
return o.getClass();
}
}
return Object.class;
}
};
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
table.setColumnSelectionAllowed(true); //epilegei to kathe keli ksexwrista
table.getSelectionModel().addListSelectionListener(
new RowColumnListSelectionListener());
table.getDefaultEditor(String.class).addCellEditorListener(
new CellEditorListener() {
public void editingCanceled(ChangeEvent e) {
System.out.println("editingCanceled");
}
public void editingStopped(ChangeEvent e) {
System.out.println("editingStopped: apply additional action");
rowIndexStart = table.getSelectedRow();
rowIndexEnd = table.getSelectionModel().getMaxSelectionIndex();
colIndexStart = table.getSelectedColumn();
colIndexEnd = table.getColumnModel().getSelectionModel().getMaxSelectionIndex();
for ( i = rowIndexStart; i <= rowIndexEnd; i++) {
for ( j = colIndexStart; j <= colIndexEnd; j++) {
Object cell_value = table.getValueAt(i,j);
Cell_value_string_after = (String) cell_value;
ia=i+1;
ja=j+1;
column_name_selected2 = table.getColumnName(ja-1);
}
}
if(Cell_value_string_before.equals(Cell_value_string_after)){
System.out.println("Do nothing");
}
else{
System.out.println("UPDATE DATABASE");
update_database();
}
}
});
JScrollPane scrollPane = new JScrollPane( table );
scrollPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
scrollPane.setBounds(5, 5, xframeWidth-20, yframeHeight-70);
getContentPane().add( scrollPane );
JPanel buttonPanel = new JPanel();
buttonPanel.setBounds(5, 856, 1574, 1);
getContentPane().add( buttonPanel );
buttonPanel.setLayout(null);
}
public void update_database(){
Object get_lastname = table.getValueAt(ia-1, 5);
String get_lastname_string = (String) get_lastname;
Object get_name = table.getValueAt(ia-1, 6);
String get_name_string=(String) get_name;
System.out.println("RESULT= "+ column_name_selected2 + " - "+Cell_value_string_after+ " - " + get_lastname_string+ " - " + get_name_string );
if(column_name_selected2.equals("ΕΠΩΝΥΜΟ") || column_name_selected2.equals("ΟΝΟΜΑ")){
JOptionPane.showMessageDialog(null, "To επώνυμο και το όνομα δεν μπορεί να αλλάξει","Μήνυμα:",JOptionPane.WARNING_MESSAGE);
}
else{
try {
PreparedStatement update = (PreparedStatement) connection.prepareStatement
("UPDATE `ΥΠΑΛΛΗΛΟΙ 2 TEST` SET `" +column_name_selected2+"` = ? WHERE ΕΠΩΝΥΜΟ= ? AND ΟΝΟΜΑ =? ");
update.setString(1,Cell_value_string_after);
update.setString(2,get_lastname_string);
update.setString(3,get_name_string);
int all_edit_query_status=update.executeUpdate();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}

jTable in GUI (java) does not show all data from database! error in TableModel?

This is a last resort. I'm studying development of Information Systems and even my teachers can't solve this... this is a nut for you to crack!!
This is the problem: My jTable in GUI gives me this:
This is what Microsoft Management Studio shows me:
As you can tell the jTable (GUI) has got 2 main problems:
The columnname "Name" does not contain any information. And it should? Why isn't it showing?
Since as you can tell, the table contains several columns, too many to even show. I therefore want to "add a restriction" that changes so that the jTable only shows the first 6 columns.
This is the code for the "creation of the table", in the DataAccessLayer:
private TableModel getResultSetAsDefaultTableModel(ResultSet rs) {
try {
String[] columnHeadings = new String[0];
Object[][] dataArray = new Object[0][0];
ResultSetMetaData md = rs.getMetaData();
int columnCount = md.getColumnCount();
for (int i = 1; i <= columnCount; i++) {
String columnName = md.getColumnName(i);
columnHeadings = Arrays.copyOf(columnHeadings, columnHeadings.length + 1);
columnHeadings[i - 1] = columnName;
}
int r = 0;
while (rs.next()) {
Object[] row = new Object[columnCount];
for (int i = 1; i <= columnCount; i++) {
row[i - 1] = rs.getObject(i);
}
dataArray = Arrays.copyOf(dataArray, dataArray.length + 1);
dataArray[r] = row;
r++;
}
DefaultTableModel dtm = new DefaultTableModel(dataArray, columnHeadings) {
public boolean isCellEditable(int row, int column) {
return false;
}
};
return dtm;
} catch (SQLException ex) {
Logger.getLogger(Dataaccesslayer.class.getName()).log(Level.SEVERE, null, ex);
}
return null;
}
If you want me to show you the path of the code (frame, controller) just say so and I'll post it.
I would be so thankful if anyone can solve this...
Regards,
Christian

I think it is because in your for loop it should say i = 0; and not i = 1; since the first information (the name) is at index 0 right ?
In your case it could be enough to just leave the for-loop as it is and change this line to:row[i - 1] = rs.getObject(i-1);
To hide or show columns you could call setMin setMax and setPreferredWidth on your TableColumn.

Change your method like next, I think it helps you:
private TableModel getResultSetAsDefaultTableModel(ResultSet rs) {
try {
List<String> columnHeadings = new ArrayList<String>();
Object[][] dataArray = new Object[0][0];
ResultSetMetaData md = rs.getMetaData();
int columnCount = md.getColumnCount();
for (int i = 1; i <= columnCount; i++) {
columnHeadings.add(md.getColumnName(i));
}
int r = 0;
while (rs.next()) {
Object[] row = new Object[columnCount];
for (int i = 1; i <= columnCount; i++) {
row[i-1] = rs.getObject(i);
}
dataArray = Arrays.copyOf(dataArray, dataArray.length + 1);
dataArray[r] = row;
r++;
}
DefaultTableModel dtm = new DefaultTableModel(dataArray,columnHeadings.toArray(new Object[columnHeadings.size()])) {
public boolean isCellEditable(int row, int column) {
return false;
}
};
return dtm;
} catch (SQLException ex) {
Logger.getLogger(Dataaccesslayer.class.getName()).log(Level.SEVERE,null, ex);
}
return null;
}
For showing not all columns use dtm.setColumnCount(2);. Here 2 is column count to show.

jTable - how to show only show limited columns? Java

This is the code for the "creation" of the table I have in my DataAccessLayer.
private TableModel getResultSetAsDefaultTableModel(ResultSet rs) {
try {
String[] columnHeadings = new String[0];
Object[][] dataArray = new Object[0][0];
ResultSetMetaData md = rs.getMetaData();
int columnCount = md.getColumnCount();
for (int i = 1; i <= columnCount; i++) {
String columnName = md.getColumnName(i);
columnHeadings = Arrays.copyOf(columnHeadings, columnHeadings.length + 1);
columnHeadings[i - 1] = columnName;
}
int r = 0;
while (rs.next()) {
Object[] row = new Object[columnCount];
for (int i = 1; i <= columnCount; i++) {
row[i - 1] = rs.getObject(i);
}
dataArray = Arrays.copyOf(dataArray, dataArray.length + 1);
dataArray[r] = row;
r++;
}
DefaultTableModel dtm = new DefaultTableModel(dataArray, columnHeadings) {
public boolean isCellEditable(int row, int column) {
return false;
}
};
return dtm;
} catch (SQLException ex) {
Logger.getLogger(Dataaccesslayer.class.getName()).log(Level.SEVERE, null, ex);
}
return null;
}
**This results in some complications, since one of my tables has 50 different columns and therefore you can't read the columnnames or what is in the cell.
The problem is that the table's values are determined by the metadata...
I want to limit the columns that are showed to a specific number (5) for all tables.
How do I do it?**
Kind regards,
Chris

you can remove tables if you want to...
int amountColumns = table.getColumnModel().getColumnCount(); //count columns
TableColumn c6 = table.getColumnModel().getColumn(6); //identif a random column
table.getColumnModel().removeColumn(c6); //remove this column
i hope that helped...

I would not remove them but change their size to 0.
int amountColumns = table.getColumnModel().getColumnCount(); //count columns
TableColumn c6 = table.getColumnModel().getColumn(6); //identif a random column
table.getColumnModel().setMin(0);
table.getColumnModel().setMax(0);
table.getColumnModel().setPreferredWidth(0);
Like i answered you in your other thread...