I have this code to which it can display data from database. It's working well but I want it to have checkbox at last column. I've found some codes here but It's only for pre-defined not values and not from database. (How to add checkboxes to JTABLE swing)
Screenshot:
Code:
public print() {
initComponents();
try{
conn = (Connection) db_connect.connectDB();
}
catch(ClassNotFoundException | SQLException ex){
JOptionPane.showMessageDialog(null, ex);
}
update_table("select name, section, student_number, gender from students");
}
public void update_table(String q){
try{
st= conn.createStatement();
st.executeQuery(q);
ResultSet rs = st.executeQuery(q);
users_list.setModel(DbUtils.resultSetToTableModel(rs));
users_list.getColumnModel().getColumn(0).setPreferredWidth(250);
users_list.getColumnModel().getColumn(0).setPreferredWidth(250);
users_list.getColumnModel().getColumn(1).setPreferredWidth(150);
users_list.getColumnModel().getColumn(2).setPreferredWidth(120);
users_list.getColumnModel().getColumn(3).setPreferredWidth(100);
int count= users_list.getModel().getRowCount();
if(count==0){
no_results_found.setVisible(true);
}
else{
no_results_found.setVisible(false);
}
}
catch(SQLException ex){
JOptionPane.showMessageDialog(null,ex);
}
}
You can try something like this:
public class JTableWithCheckBox {
private JFrame mainFrame;
private JTable studentTable;
private JScrollPane scrollPaneTable;
private DefaultTableModel model = new DefaultTableModel(new Object[][] {
{ "Ramesh", "Male" }, { "Sheela", "Female" },
{ "Amithabh", "Male" }, { "Katrina", "Female" } }, new Object[] {
"Name", "Gender" });
public static void main(String[] args) {
final JTableWithCheckBox ui = new JTableWithCheckBox();
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
ui.initGUI();
}
});
}
private void initGUI() {
mainFrame = new JFrame("View");
mainFrame.getContentPane().setLayout(new BorderLayout());
mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mainFrame.setSize(300, 200);
mainFrame.setVisible(true);
mainFrame.setLocationRelativeTo(null);
studentTable = new JTable(model);
studentTable.getColumnModel().getColumn(1)
.setCellRenderer(new MFCheckBox());
scrollPaneTable = new JScrollPane(studentTable);
mainFrame.add(scrollPaneTable, BorderLayout.NORTH);
}
private class MFCheckBox implements TableCellRenderer {
#Override
public Component getTableCellRendererComponent(JTable table,
Object value, boolean isSelected, boolean hasFocus, int row,
int column) {
JPanel cbPanel = new JPanel();
JCheckBox maleBox = new JCheckBox("Male");
JCheckBox femaleBox = new JCheckBox("Female");
cbPanel.setLayout(new BorderLayout());
cbPanel.add(maleBox, BorderLayout.WEST);
cbPanel.add(femaleBox, BorderLayout.EAST);
if (value != null) {
if (value instanceof String) {
String valStr = (String) value;
switch (valStr) {
case "Male":
maleBox.setSelected(true);
femaleBox.setSelected(false);
break;
case "Female":
maleBox.setSelected(false);
femaleBox.setSelected(true);
break;
default:
maleBox.setSelected(false);
femaleBox.setSelected(false);
break;
}
}
}
return cbPanel;
}
}
}
If you also want checkbox editable, you will have to set TableCellEditor as well.
The easiest way is to NOT use DBUtils and to load the data from the ResultSet into the TableModel` yourself.
The code is not difficult and you can use the Table From Database Example found in Table From Database as the starting point.
The code just loads the data from the ResultSet into Vectors, so you can then manually add another column to contain Boolean data.
The changes to the code would be something like:
// Get column names
for (int i = 1; i <= columns; i++)
{
columnNames.addElement( md.getColumnName(i) );
}
columnName.addElement( "Check Mark" ); // added
// Get row data
while (rs.next())
{
Vector<Object> row = new Vector<Object>(columns);
for (int i = 1; i <= columns; i++)
{
row.addElement( rs.getObject(i) );
}
row.addElement( Boolean.FALSE ); // added
data.addElement( row );
}
The other option is to create a "wrapper" TableModel that wraps a Boolean column with your DBUtils TableModel. Check out How to add checkbox in Jtable populated using rs2xml for an example of this approach.
That answer places the check box column at the start of the table, so you would need to modify the code to place the check box at the end.
Related
I would like to know how to set up a JComboBox in a particular cell in a JTable.
I have seen people using TableColumn setCellEditor(new DefaultCellEditor(comboBox)).
But this is for an entire column, I would like a specific cell.
So maybe I should do a custom TableCellEditor that would fit my needs, but I am a little lost on how to do it...
The goal of this is to manage filters on parameters. There are two kinds of filters:
The one that compares two values, for instance: number of balloons > 5
The one that will say is a value is inside a range of value, for instance: parameter name is inside {"one", "two", "three", "seven"}.
screenshot of my JTable:
As we can see in the picture, when there is the "comparator" "is among", we would need a JComboBox in cell[0][2] to choose the values of the range within a complete set of fields.
While cell[1][2] does not need a JComboBox, but just an editable cell.
I hope I have been clear and thank you for your help.
EDIT:
I was able to display a JComboBox only to realize, I couldn't select multiple values on it. So now I am trying to display a JList instead of a ComboBox.
But when I click on the cell, the JList is not displayed, I don't know why.
Here is my code:
JTable tableParametersFilter = new JTable(modelParametersFilter){
// Determine editor to be used by row
public TableCellEditor getCellEditor(int row, int column)
{
int modelColumn = convertColumnIndexToModel( column );
int modelRow = convertRowIndexToModel( row );
Parameter_Filter pf = view.listParameter_Filter.get(modelRow);
if(modelColumn == 2 && pf instanceof Parameter_Filter_To_List_Of_Fields) {
Parameter_Filter_To_List_Of_Fields pftlof = (Parameter_Filter_To_List_Of_Fields)pf;
JList<String> list = new JList<String>(pftlof.list_of_fields_total_names);
list.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION );
list.setLayoutOrientation(JList.VERTICAL_WRAP);
list.setVisibleRowCount(-1);
return new TableCellEditor() {
#Override
public boolean stopCellEditing() {
return false;
}
#Override
public boolean shouldSelectCell(EventObject anEvent) {
return false;
}
#Override
public void removeCellEditorListener(CellEditorListener l) {
}
#Override
public boolean isCellEditable(EventObject anEvent) {
return true;
}
#Override
public Object getCellEditorValue() {
return list.getSelectedValuesList().toString();
}
#Override
public void cancelCellEditing() {
}
#Override
public void addCellEditorListener(CellEditorListener l) {
}
#Override
public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
return list;
}
};
}
return super.getCellEditor(row, column);
}
};
Any suggestions?
I have solved my problem.
I have not been able to add multiple choice JComboBox, or a displayable JList on the Cell of the Jtable.
Instead, I have used a JOptionPane that displayed a JList.
Here's the code:
tableParametersFilter.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
JTable target = (JTable)e.getSource();
int row = target.getSelectedRow();
int column = target.getSelectedColumn();
if(column == 2){
Parameter_Filter pf = view.listParameter_Filter.get(row);
if(pf instanceof Parameter_Filter_To_List_Of_Fields) {
Parameter_Filter_To_List_Of_Fields pftlof = (Parameter_Filter_To_List_Of_Fields) pf;
JList<String> jlist = new JList<String>(pftlof.list_of_fields_total_names);
String StringOfIntArray = (String) tableParametersFilter.getValueAt( row, 2);
int[] list_parameter_id = Statique.StringOfIntArrayToIntegerArray(StringOfIntArray);
if(list_parameter_id.length < jlist.getModel().getSize()) {
int[] list_places = pftlof.getPlaceOfParameters(list_parameter_id);
for(int i = 0; i < list_places.length; i++) {
jlist.setSelectedIndices(list_places);
}
}
JScrollPane scrollPane = new JScrollPane(jlist);
scrollPane.setPreferredSize( new Dimension( 500, 500 ) );
JOptionPane.showMessageDialog(
null, scrollPane, "Multi-Select Example", JOptionPane.PLAIN_MESSAGE);
int[] SelectedIndices = jlist.getSelectedIndices();
Integer[] listParametersId = new Integer[SelectedIndices.length];
for(int i = 0; i < SelectedIndices.length; i++) {
int id = pftlof.list_of_fields_Total[SelectedIndices[i]].id;
try {
Parameter p = Parameter.getParameter(
id,
Parameter_Filter_To_List_Of_Fields.getTotal_Parameter_In_Parameter_Filter_To_List_Of_Fields());
listParametersId[i] = p.id;
} catch (NoSuchFieldException e1) {
e1.printStackTrace();
}
}
System.out.println(Arrays.toString(listParametersId));
tableParametersFilter.setValueAt(Arrays.toString(listParametersId), row, 2);
}
}
}
}
I am looking to modify the way cell input is handled in my JTable. Currently I am using a DefaultTableModel as seen below.
DefaultTableModel model = new DefaultTableModel() {
#Override
public boolean isCellEditable(int row, int col) {
return col == 1 || col == 2 || col == 6;
}
#Override
public Class getColumnClass(int col) {
if (col == 6) {
return Integer.class;
} else {
return String.class;
}
}
};
With this code column 6 forces the user to input an Integer. I would like to take this further by not allowing the number to be outside of a range (e.g. 1-100) and also for the field to never be empty (The column will have data in it prior to user interaction). I have read the docummentation but cannot seem to find anything that manages the behaviour of column types. Thanks!
You would need to create a custom editor.
The following example demonstrates and editor that forces the data to be 5 characters:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.table.*;
public class TableFiveCharacterEditor extends DefaultCellEditor
{
private long lastTime = System.currentTimeMillis();
public TableFiveCharacterEditor()
{
super( new JTextField() );
}
public boolean stopCellEditing()
{
JTable table = (JTable)getComponent().getParent();
try
{
String editingValue = (String)getCellEditorValue();
if(editingValue.length() != 5)
{
JTextField textField = (JTextField)getComponent();
textField.setBorder(new LineBorder(Color.red));
textField.selectAll();
textField.requestFocusInWindow();
JOptionPane.showMessageDialog(
table,
"Please enter string with 5 letters.",
"Alert!",JOptionPane.ERROR_MESSAGE);
return false;
}
}
catch(ClassCastException exception)
{
return false;
}
return super.stopCellEditing();
}
public Component getTableCellEditorComponent(
JTable table, Object value, boolean isSelected, int row, int column)
{
Component c = super.getTableCellEditorComponent(
table, value, isSelected, row, column);
((JComponent)c).setBorder(new LineBorder(Color.black));
return c;
}
private static void createAndShowUI()
{
JTable table = new JTable(5, 5);
table.setPreferredScrollableViewportSize(table.getPreferredSize());
JScrollPane scrollPane = new JScrollPane(table);
// Use a custom editor
TableCellEditor fce = new TableFiveCharacterEditor();
table.setDefaultEditor(Object.class, fce);
JFrame frame = new JFrame("Table Five Character Editor");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add( scrollPane );
frame.pack();
frame.setLocationByPlatform( true );
frame.setVisible( true );
}
public static void main(String[] args)
{
EventQueue.invokeLater(new Runnable()
{
public void run()
{
createAndShowUI();
}
});
}
}
You would need to modify the editor to make sure:
the data is an Integer by using the Integer.parseInt(...) method
that the Integer value is in your desired range
Edit:
how can I apply this to influence one column rather than the entire table.
You can add the editor to the TableColumn:
table.getColumnModel().getColumn(...).setCellEditor(...);
Overriding the behaviour of the DefaultCellEditor achieves the desired outcome.
DefaultCellEditor editor = new DefaultCellEditor(new JTextField()) {
#Override
public boolean stopCellEditing() {
JTable table = (JTable) getComponent().getParent();
try {
String value = (String) getCellEditorValue();
if (Integer.parseInt(value) < 1) {
JTextField textField = (JTextField) getComponent();
textField.setBorder(new LineBorder(Color.red));
textField.selectAll();
textField.requestFocusInWindow();
return false;
}
} catch (NumberFormatException ex) {
return false;
}
return super.stopCellEditing();
}
};
Then added to the desired column of the table.
table.getColumnModel().getColumn(6).setCellEditor(editor);
Edit: The behaviour inside the if statement will not occur if a NumberFormatException is thrown, you may want to put the same lines of code within the catch.
I have made a JOptionPane which contains a JPanel. The panel contains one button and one Jtable.
JPanel p = atomicAttack.getPanel(); //make the panel and return it
JOptionPane.showOptionDialog(null, p,"Atomic Attacks",
JOptionPane.DEFAULT_OPTION,JOptionPane.INFORMATION_MESSAGE,
null, new Object[]{}, null);
and inside the JButton i have:
private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {
selectedId=jTable1.getValueAt(jTable1.getSelectedRow(), 0).toString();
}
I need to when the user clicks on the button, the JOption get closed and the selectedId get return from the JOptionPane?
I have seen this, but it is not exactly what i am looking for.
Because the button does not return the value for me.
Focus on the models and things will be easier.
public static void main(String[] args) {
DefaultTableModel tableModel = new DefaultTableModel();
tableModel.addColumn("Selection", new Object[] { "A", "B", "C" });
JTable table = new JTable(tableModel);
ListSelectionModel selectionModel = table.getSelectionModel();
JPanel p = new JPanel(new BorderLayout());
p.add(table, BorderLayout.CENTER);
int option = JOptionPane.showConfirmDialog(null, p, "Atomic Attacks", JOptionPane.OK_CANCEL_OPTION,
JOptionPane.INFORMATION_MESSAGE);
if (JOptionPane.OK_OPTION == option) {
printSelection(selectionModel, tableModel);
} else {
selectionModel.clearSelection();
}
}
private static void printSelection(ListSelectionModel selectionModel, TableModel tableModel) {
for (int i = selectionModel.getMinSelectionIndex(); i <= selectionModel.getMaxSelectionIndex(); i++) {
if (selectionModel.isSelectedIndex(i)) {
Object selectedValue = tableModel.getValueAt(i, 0);
System.out.println(selectedValue);
}
}
}
If you now select multiple rows
and press the ok button the result will be
A
C
If you want a single selection you can just set
ListSelectionModel selectionModel = table.getSelectionModel();
selectionModel.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
basically what i am trying to do is, i have a JList which contain a list of available drive, if one of that drive selected by user then i will show all html files which located in selected drive in a JTable, so i put an event listener for my JList and then i create a JTable and put all data there and show it in the container. the code look like this:
static class HtmlListing implements ListSelectionListener
{
public void valueChanged(ListSelectionEvent event)
{
if (!event.getValueIsAdjusting())
{ //trying to remove and re-add controls in container.
EastCont.removeAll();
globarr = new ArrayList<File>(); // global variable
FileListing fl = new FileListing();
fl.walk(fileList1.getSelectedValue() + "work\\airasia\\html", 500, 0);
//if(globarr.size() > 0)
//{
Object[][] data = new Object[globarr.size()][globarr.size()];
for(int i = 0; i < globarr.size(); i++)
{
if(globarr.get(i).isFile())
{
String filename = globarr.get(i).getName().toString();
String date = sdf.format(globarr.get(i).lastModified());
Object[] obj = new Object[] {filename, filename.substring(filename.lastIndexOf(".") + 1), date, globarr.get(i).getAbsolutePath()};
data[i] = obj;
}
}
Object[] column = new Object[]{"name ", "type", "date modified", "path"};
DefaultTableModel model = new DefaultTableModel(data, column);
model.fireTableDataChanged();
table = new JTable(model)
{
private static final long serialVersionUID = 1L;
public boolean isCellEditable(int row, int column)
{
return false;
};
};
table.addMouseListener(new MouseAdapter()
{
public void mouseClicked(MouseEvent e)
{
if (e.getClickCount() == 2)
{
int rowIdx = table.getSelectedRow(); // path to your new file
TableModel tm = table.getModel();
String path = tm.getValueAt(rowIdx, 3).toString();
File htmlFile = new File(path);
try // open the default web browser for the HTML page
{
Desktop.getDesktop().browse(htmlFile.toURI());
//Desktop.getDesktop().open(htmlFile);
}
catch (IOException e1)
{
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
}
});
table.removeColumn(table.getColumnModel().getColumn(3)); //hide column path from display
table.setFillsViewportHeight(true);
table.setIntercellSpacing(new Dimension(0, 5));
table.setShowGrid(false);
scrollPane = new JScrollPane(table);
EastCont = new JPanel();
EastCont.setLayout(new BorderLayout());
EastCont.add(scrollPane);
EastCont.setPreferredSize(new Dimension(1050, 1000));
//EastCont.repaint();
//EastCont.revalidate();
gui.add(EastCont, BorderLayout.EAST);
gui.revalidate();
gui.repaint();
// }
// else
// {
// EastCont.remove(table);
// gui.remove(EastCont);
// gui.revalidate();
// gui.repaint();
// }
}
this code work only for first time, but does not working for second time and so on, so what i miss here? any help would be great. thank you.
DefaultTableModel model = new DefaultTableModel(data, column);
//model.fireTableDataChanged();
//table = new JTable(model)
table.setModel( model );
Don't create a new table change reset the model of your current table. The rest of the code in that method is not necessary either since you are not creating any new GUI components.
Also, never invoke a fireXXX method. That is the responsibility of the TableModel.
I've 2 panels. One where the user inserts the data and the other with a JTable where the results will be shown.
My problem is when the user press's the ok (in my case apply) JButton the data is computed but is not shown on the JTable, nothing changes in the JTable.
For my JTable I'm using the Bean Table Model from tips4Java (http://tips4java.wordpress.com/2008/11/27/bean-table-model/).
One weird thing is if I send data (lets call this data 'A') to the table when the program starts it is shown on the table and if later on I try to update the table, the table does not update. But when I don't send data to the table at start up but try to update/send the table with data 'A' it does not update.
So my question is, why is not the JTable showing whatever data I send to?
Here's my code:
JButton listenere that starts the processing and sends the data to the table:
crashForm.setFormListener(new FormListener() {
#Override
public void formEvent(OptionsFormEvent oe) {
String readTable = oe.getReadFromTable();
int access = oe.getAccess();
int transition = oe.getTransition();
boolean smooth = oe.isTrainCrash();
ArrayList<String> allTrains = new ArrayList<>();
List crashedTrainList = new ArrayList<>();
try {
allTrains = controller.getUniqueTrains(controller.connectServer(), readTable, "trainid");
} catch (Exception ex) {
JOptionPane.showMessageDialog(null, "An error occured while getting trains data\n"
+ "Error description: " + ex.getMessage(), "Error",
JOptionPane.ERROR_MESSAGE);
}
try {
for (int i = 0; i < allTrains.size(); i++)
{
ArrayList<Train> trainDataList = new ArrayList<>();
ArrayList<Train> crashedProccessedData = new ArrayList<>();
String query = "the sql query...";
trainDataList = controller.getTrainData(controller.connectServer(), readTable, query);
crashedProccessedData = controller.detectCrash(access, transition, trainDataList);
crashedTrainList.addAll(crashedProccessedData);
}
} catch (Exception ex) {
JOptionPane.showMessageDialog(null, "An error occured while detecting a crash.\n"
+ "Error description: " + ex.getMessage(), "Error",
JOptionPane.ERROR_MESSAGE);
}
System.out.println("Total crashes detected:" + crashedTrainList.size());
tablePanel.createTable(Train.class, crashedTrainList, true, false, tableLabels);
tablePanel.fireTableDataChanged();
}
});
}
And here's my tablePanel class:
public TablePanel() {
}
public void createTable(Class c, List data, boolean toolBarUp,
boolean toolBarBottom, ArrayList<String> labelsCheckBox) {
beanTableModel = new BeanTableModel(c, data);
columnModel = new XTableColumnModel();
table = new JTable(beanTableModel);
table.setColumnModel(columnModel);
table.createDefaultColumnsFromModel();
if(toolBarUp == true)
{
final JToolBar toolBarTop = new JToolBar();
// Create the Show ALL
JButton reset = new JButton("Reset");
reset.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
for(Component c : toolBarTop.getComponents()){
if(c instanceof JCheckBox){
JCheckBox checkBox = (JCheckBox) c;
checkBox.setSelected(false);
columnModel.setAllColumnsVisible();
}
}
int numberOfColumn = columnModel.getColumnCount();
for(int aux = 0; aux < numberOfColumn; aux++)
{
int num = columnModel.getColumnCount();
TableColumn column = columnModel.getColumnByModelIndex(aux);
columnModel.setColumnVisible(column, true);
}
}
});
toolBarTop.add(reset);
// Create a JCheckBox for each column
for(int i = 0; i < labelsCheckBox.size(); i++)
{
final int index = i;
toolBarTop.add(new JCheckBox(new AbstractAction(labelsCheckBox.get(i)) {
#Override
public void actionPerformed(ActionEvent e) {
TableColumn column = columnModel.getColumnByModelIndex(index);
boolean visible = columnModel.isColumnVisible(column);
columnModel.setColumnVisible(column, !visible);
}
}));
}
setLayout(new BorderLayout());
add(toolBarTop, BorderLayout.NORTH);
add(new JScrollPane(table), BorderLayout.CENTER);
// add(toolBarDown, BorderLayout.SOUTH);
}
final JToolBar toolBarDown = new JToolBar();
toolBarDown.add(new JButton(new AbstractAction("Save Table") {
#Override
public void actionPerformed(ActionEvent e) {
throw new UnsupportedOperationException("Not supported yet.");
}
}));
}
public void createTable(Class c, Class cAncestor) {
beanTableModel = new BeanTableModel(c, cAncestor);
table = new JTable(beanTableModel);
setLayout(new BorderLayout());
add(new JScrollPane(table), BorderLayout.CENTER);
}
public void createTable(Class c, Class cAncestor, List data) {
beanTableModel = new BeanTableModel(c, cAncestor, data);
table = new JTable(beanTableModel);
setLayout(new BorderLayout());
add(new JScrollPane(table), BorderLayout.CENTER);
beanTableModel.fireTableDataChanged();
}
public void createTable(Class c) {
beanTableModel = new BeanTableModel(c);
table = new JTable(beanTableModel);
setLayout(new BorderLayout());
add(new JScrollPane(table), BorderLayout.CENTER);
}
public void createTable(Class c, List data)
{
beanTableModel = new BeanTableModel(c, data);
table = new JTable(beanTableModel);
setLayout(new BorderLayout());
add(new JScrollPane(table), BorderLayout.CENTER);
}
//to refresh the table everytime there is an update
public void fireTableDataChanged()
{
beanTableModel.fireTableDataChanged();
}
So again, my question is: Isn't my JTable not updated with the new results every time I send new data to it?
You should never invoke fireTableDataChanged manually. Only the TableModel is responsible for invoking this event.
From your code it looks like you are creating a new TableModel, JTable and JScrollPane every time you make a change. Any time you add a component to a visible GUI the basic code should be:
panel.add(....);
panel.revalidate();
panel.repaint();
By default all components have a size of zero so since you don't invoke revalidate() then never get a proper size and there is nothing to paint. Also, it is never a good idea to simply keep adding components to the CENTER of your panel since the old component are still part of the container.
However, there is a better solution. There is no need to keep creating new components. All you need to do is create an new TableModel and then use:
table.setModel( newlyCreatedModel );
and the model will be added to the table and the table will repaint itself automatically.