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How to do a selection in cascade of JCombobox choices in a JTable?

I have a JTable with numbers 1,2,3 as 1st column and the number as text in the 2nd column which can be chosen with a JCombobox. For example 1 can be represented as "1", ONE, FIRST or ONCE in the 2nd column. When I make a choice, all the comboboxes of the rows below have to be updated in cascade with the text of the same nature. So if I choose ONCE, the comboboxes of the rows below should be updated to TWICE, THRICE. If I choose FIRST, the comboboxes of the rows below should be updated to SECOND, THIRD. And so on..
At first it looks like it's working but whenever I click somewhere else on the JTable, the combobox is updated with the value of the last row. For example, if I choose ONCE in the 1st row, at first it will update the other rows to TWICE and THRICE. Then if I click on any row, the combobox selection will be updated to THRICE on the 1st row. Next time I click, the 2nd row is updated to THRICE.
What am I doing wrong here?
The combobox cell editor:
public class NumberChoiceEditor extends DefaultCellEditor {
private static final long serialVersionUID = 1L;
private String numberAsText;
private static final String[][] NUMBERS = { { "1", "ONE", "FIRST", "ONCE" }, { "2", "TWO", "SECOND", "TWICE" }, { "3", "THREE", "THIRD", "THRICE" } };
public NumberChoiceEditor() {
super(new JComboBox<>());
}
#Override
public Object getCellEditorValue() {
return numberAsText;
}
#Override
public Component getTableCellEditorComponent(final JTable table, final Object value, final boolean isSelected, final int row, final int column) {
if (value instanceof String) {
numberAsText = (String) value;
}
JComboBox<String> numberTextChoice = new JComboBox<>(NUMBERS[row]);
numberTextChoice.setSelectedItem(numberAsText);
numberTextChoice.addActionListener(e -> {
numberAsText = (String) numberTextChoice.getSelectedItem();
int nextRow = row + 1;
if (nextRow < NUMBERS.length) {
String numberText = (String) table.getValueAt(nextRow, 1);
JComboBox<String> nextRowChoices = (JComboBox<String>) getTableCellEditorComponent(table, numberText, isSelected, nextRow, column);
nextRowChoices.setSelectedIndex(numberTextChoice.getSelectedIndex());
table.setValueAt(nextRowChoices.getSelectedItem(), nextRow, 1);
}
});
return numberTextChoice;
}
}
The main class with the frame:
public class NumberTable {
public static void main(String[] args) {
SwingUtilities.invokeLater(() -> {
JTable table = new JTable(new Object[][] { { 1, "1" }, { 2, "2" }, { 3, "3" } }, new Object[] { "Number", "Number Text" });
table.getColumn("Number Text").setCellEditor(new NumberChoiceEditor());
table.setRowHeight(25);
JFrame frame = new JFrame("Number Table");
frame.add(new JScrollPane(table));
frame.setLocationRelativeTo(null);
frame.setSize(600, 200);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
});
}
}

I would use a TableModelListener. When the value is changed via the JComboBox editor, I would adjust the TableModel accordingly.
(Notes after the code.)
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.EventQueue;
import javax.swing.DefaultCellEditor;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
public class NumTable implements Runnable, TableModelListener {
private boolean adjusting;
private JFrame frame;
private JTable table;
#Override
public void run() {
createGui();
}
#Override
public void tableChanged(TableModelEvent event) {
if (!adjusting) {
adjusting = true;
int col = event.getColumn();
if (col == 1) {
NumChoiceEd editor = (NumChoiceEd) table.getColumnModel().getColumn(1).getCellEditor();
int row = event.getFirstRow();
JComboBox<String> combo = editor.getCombo(row);
if (combo != null) {
int ndx = combo.getSelectedIndex();
if (ndx >= 0) {
int rows = table.getRowCount();
for (int i = 0; i < rows; i++) {
combo = editor.getCombo(i);
String val = combo.getModel().getElementAt(ndx);
table.setValueAt(val, i, col);
}
}
}
}
adjusting = false;
}
}
private void createGui() {
frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(createTable(), BorderLayout.CENTER);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
private JScrollPane createTable() {
Object[][] data = new Object[][]{{1, "1"}, {2, "2"}, {3, "3"}};
Object[] columnNames = new Object[]{"Number", "Number Text"};
DefaultTableModel model = new DefaultTableModel(data, columnNames);
model.addTableModelListener(this);
table = new JTable(model);
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
TableColumnModel tcm = table.getColumnModel();
TableColumn column = tcm.getColumn(1);
column.setCellEditor(new NumChoiceEd());
JScrollPane scrollPane = new JScrollPane(table);
return scrollPane;
}
public static void main(String[] args) {
EventQueue.invokeLater(new NumTable());
}
}
class NumChoiceEd extends DefaultCellEditor {
private static final long serialVersionUID = 1L;
private JComboBox<String> oneCombo;
private JComboBox<String> twoCombo;
private JComboBox<String> threeCombo;
public NumChoiceEd() {
super(new JComboBox<>());
oneCombo = new JComboBox<>(new String[]{"1", "ONE", "FIRST", "ONCE"});
twoCombo = new JComboBox<>(new String[]{"2", "TWO", "SECOND", "TWICE"});
threeCombo = new JComboBox<>(new String[]{"3", "THREE", "THIRD", "THRICE"});
}
public JComboBox<String> getCombo(int row) {
switch (row) {
case 0:
return oneCombo;
case 1:
return twoCombo;
case 2:
return threeCombo;
default:
return null;
}
}
#Override
public Component getTableCellEditorComponent(final JTable table,
final Object value,
final boolean isSelected,
final int row,
final int column) {
if (column == 1) {
switch (row) {
case 0:
return oneCombo;
case 1:
return twoCombo;
case 2:
return threeCombo;
default:
return super.getTableCellEditorComponent(table, value, isSelected, row, column);
}
}
else {
return super.getTableCellEditorComponent(table, value, isSelected, row, column);
}
}
}
Rather than create a new JComboBox each time method getTableCellEditorComponent is called, I initially create all three JComboBoxes and return the relevant one.
You don't need to override method getCellEditorValue because the superclass method (in class DefaultCellEditor) will return the correct value.
Once the user changes the value (and closes the table cell editor), method tableChanged is invoked. In that method, I get the index of the value that was selected from the JComboBox and then I go through all the rows in the JTable and get the value at that index in the JComboBox for each row and set the JTable value to that value.
Because I change the TableModel in method tableChanged, that will cause the method to be called again. In order to prevent the recursive call, I use the adjusting flag.
In the below screen capture, I have selected a value from the JComboBox but I have not yet closed the editor. If I navigate to a different cell in the JTable that will close the editor and then all the displayed data will change. Note that if you navigate to column Number Text in a different row, you may not see the change since that will immediately open the JComboBox editor for the cell that you navigated to.
After I close the editor, the table looks as in the below screen capture.
Note that there is a lot of blank space in the above screen captures since the default dimensions of JTable are quite large but the space required to display the data (in this case) is small. One way to make the JTable smaller (in this case) would be to change the preferred size of the JScrollPane.
EDIT
In response to the question you asked in your comment, namely
is it possible to update on the combobox value change
Yes, it is possible. You add an ActionListener to each JComboBox that simply calls method stopCellEditing. Here is the above code, modified to include the ActionListener. The only changes are in class NumChoiceEd.
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.EventQueue;
import java.awt.event.ActionListener;
import javax.swing.DefaultCellEditor;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
public class NumTable implements Runnable, TableModelListener {
private boolean adjusting;
private JFrame frame;
private JTable table;
#Override
public void run() {
createGui();
}
#Override
public void tableChanged(TableModelEvent event) {
if (!adjusting) {
adjusting = true;
int col = event.getColumn();
if (col == 1) {
NumChoiceEd editor = (NumChoiceEd) table.getColumnModel().getColumn(1).getCellEditor();
int row = event.getFirstRow();
JComboBox<String> combo = editor.getCombo(row);
if (combo != null) {
int ndx = combo.getSelectedIndex();
if (ndx >= 0) {
int rows = table.getRowCount();
for (int i = 0; i < rows; i++) {
combo = editor.getCombo(i);
String val = combo.getModel().getElementAt(ndx);
table.setValueAt(val, i, col);
}
}
}
}
adjusting = false;
}
}
private void createGui() {
frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(createTable(), BorderLayout.CENTER);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
private JScrollPane createTable() {
Object[][] data = new Object[][]{{1, "1"}, {2, "2"}, {3, "3"}};
Object[] columnNames = new Object[]{"Number", "Number Text"};
DefaultTableModel model = new DefaultTableModel(data, columnNames);
model.addTableModelListener(this);
table = new JTable(model);
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
TableColumnModel tcm = table.getColumnModel();
TableColumn column = tcm.getColumn(1);
column.setCellEditor(new NumChoiceEd());
JScrollPane scrollPane = new JScrollPane(table);
return scrollPane;
}
public static void main(String[] args) {
EventQueue.invokeLater(new NumTable());
}
}
class NumChoiceEd extends DefaultCellEditor {
private static final long serialVersionUID = 1L;
private JComboBox<String> oneCombo;
private JComboBox<String> twoCombo;
private JComboBox<String> threeCombo;
public NumChoiceEd() {
super(new JComboBox<>());
ActionListener al = event -> NumChoiceEd.this.stopCellEditing(); // ADDED THIS LINE
oneCombo = new JComboBox<>(new String[]{"1", "ONE", "FIRST", "ONCE"});
oneCombo.addActionListener(al); // ADDED THIS LINE
twoCombo = new JComboBox<>(new String[]{"2", "TWO", "SECOND", "TWICE"});
twoCombo.addActionListener(al); // ADDED THIS LINE
threeCombo = new JComboBox<>(new String[]{"3", "THREE", "THIRD", "THRICE"});
threeCombo.addActionListener(al); // ADDED THIS LINE
}
public JComboBox<String> getCombo(int row) {
switch (row) {
case 0:
return oneCombo;
case 1:
return twoCombo;
case 2:
return threeCombo;
default:
return null;
}
}
#Override
public Component getTableCellEditorComponent(final JTable table,
final Object value,
final boolean isSelected,
final int row,
final int column) {
if (column == 1) {
switch (row) {
case 0:
return oneCombo;
case 1:
return twoCombo;
case 2:
return threeCombo;
default:
return super.getTableCellEditorComponent(table, value, isSelected, row, column);
}
}
else {
return super.getTableCellEditorComponent(table, value, isSelected, row, column);
}
}
}

JTable Rendering with checkbox

Is there anyone know how I can add a checkbox in this code:
String data[][]={
{"Apple","Banana","Mango"}, {"Apple","Banana","Mango"}, {"Apple","Banana","Mango"}
};
String column[]={"Fruits","Fruits","Fruits"};
table=new JTable(new DefaultTableModel(data, column)){
private Border outside = new MatteBorder(1, 0, 1, 0, Color.RED);
private Border inside = new EmptyBorder(0, 1, 0, 1);
private Border highlight = new CompoundBorder(outside, inside);
public Component prepareRenderer(TableCellRenderer renderer, int row, int column)
{
Component c = super.prepareRenderer(renderer, row, column);
JComponent jc = (JComponent)c;
// Add a border to the selected row
if (isRowSelected(row))
jc.setBorder( highlight );
return c;
}
};
jScrollPane1.setViewportView(table);
I just want to add checkboxes so that if I check a checkbox it will highlight and all checked checkboxes will be highlighted. Thank You in advance for helping me!

Here is pseudo code, I found somewhere in my repository. Use it according to your use.
import java.awt.Color;
import java.awt.Component;
import javax.swing.*;
import javax.swing.table.*;
public class TableCheckBoxHighLight extends JFrame {
private static final long serialVersionUID = 1L;
private JTable table;
public TableCheckBoxHighLight() {
Object[] columnNames = { "Col1", "Col2", "Select" };
Object[][] data = {
{ "Item1", "123", false },
{ "Item2", "345", false },
{ "Item3", "678", false },
{ "Item4", "901", false }
};
DefaultTableModel model = new DefaultTableModel(data, columnNames);
table = new JTable(model) {
private static final long serialVersionUID = 1L;
#SuppressWarnings("unchecked")
#Override
public Class getColumnClass(int column) {
switch (column) {
case 0:
return String.class;
case 1:
return String.class;
default:
return Boolean.class;
}
}
#Override
public Component prepareRenderer(TableCellRenderer renderer,
int row, int col) {
Component c = super.prepareRenderer(renderer, row, col);
int[] selCols = table.getSelectedColumns();
table.setSelectionBackground(Color.GREEN);
for (int i : selCols)
c.setBackground(Color.RED);
return c;
}
};
table.setPreferredScrollableViewportSize(table.getPreferredSize());
JScrollPane scrollPane = new JScrollPane(table);
getContentPane().add(scrollPane);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
TableCheckBoxHighLight frame = new TableCheckBoxHighLight();
frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
frame.pack();
frame.setLocation(150, 150);
frame.setVisible(true);
}
});
}
}

Error in getRowCount() on DefaultTableModel

EDIT
I've tried changing the table model back to DefaultTableModel but I am getting an Exception when compiling my code and I can't figure out why!
Here's my table init:
jTable1.setModel(new Table1Model());
jTable1.setDefaultRenderer(Color.class,new ColorRenderer(true));
jTable1.getColumnModel().getColumn(5).setCellEditor(new ColorEditor());
My class extending the model:
class Table1Model extends DefaultTableModel {
//private String[] columnNames = {"Station #",
private Object[] columnNames = {"Station #",
"Name",
"avg Time",
"Buffer",
"Buffer Parts",
"Color"};
private Object[][] data = {
{"1", "Station 1",
new Integer(10), false, new Integer(0), Color.red},
{"2", "Station 2",
new Integer(10), false, new Integer(0), Color.blue},
{"3", "Station 3",
new Integer(10), false, new Integer(0), Color.green},
{"4", "Station 4",
new Integer(10), false, new Integer(0), Color.orange},
{"5", "Station 5",
new Integer(10), false, new Integer(0), Color.black}
};
#Override
public int getColumnCount() {
return columnNames.length;
}
#Override
public int getRowCount() {
//int length = data.length;
//int datalength = Integer.parseInt(length);
return data.length;
}
#Override
public String getColumnName(int col) {
return columnNames[col].toString();
}
#Override
public Object getValueAt(int row, int col) {
return data[row][col];
}
/*
* JTable uses this method to determine the default renderer/
* editor for each cell. If we didn't implement this method,
* then the last column would contain text ("true"/"false"),
* rather than a check box.
*/
#Override
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
}
/*
* Don't need to implement this method unless your table's
* editable.
*/
#Override
public boolean isCellEditable(int row, int col) {
//Note that the data/cell address is constant,
//no matter where the cell appears onscreen.
if (col == 0) { return false; }
else if (col == 4) {
boolean di = (Boolean) getValueAt(row,(col-1));
if (!di) { return false; }
else { return true; }
}
else { return true; }
}
/*
* Don't need to implement this method unless your table's
* data can change.
*/
#Override
public void setValueAt(Object value, int row, int col) {
data[row][col] = value;
fireTableCellUpdated(row, col);
}
/*public void removeRow(int row) {
data.removeRow(row);
}*/
private void printDebugData() {
int numRows = getRowCount();
int numCols = getColumnCount();
for (int i=0; i < numRows; i++) {
System.out.print(" row " + i + ":");
for (int j=0; j < numCols; j++) {
System.out.print(" " + data[i][j]);
}
System.out.println();
}
System.out.println("--------------------------");
}
}
This generates the following error:
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at SimGui$Table1Model.getRowCount(SimGui.java:863)
at javax.swing.table.DefaultTableModel.setDataVector(DefaultTableModel.java:224)
at javax.swing.table.DefaultTableModel.<init>(DefaultTableModel.java:124)
at javax.swing.table.DefaultTableModel.<init>(DefaultTableModel.java:106)
at javax.swing.table.DefaultTableModel.<init>(DefaultTableModel.java:86)
at SimGui$Table1Model.<init>(SimGui.java:832)
at SimGui.initComponents(SimGui.java:265)
at SimGui.<init>(SimGui.java:34)
at SimGui$16.run(SimGui.java:789)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:701)
at java.awt.EventQueue.access$000(EventQueue.java:102)
at java.awt.EventQueue$3.run(EventQueue.java:662)
at java.awt.EventQueue$3.run(EventQueue.java:660)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:671)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:244)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:147)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:139)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:97)
Can you help me figure out what's wrong?
Also, will I be able to use the ColorEditor with the DefaultTableModel?

You have two obvious choices here: either give your class a getVectorData() method or else give it another similarly useful method that allows you to extract the nucleus of your data from your model. You probably shouldn't use an AbstractTableModel variable though but rather use a variable of your own custom type that extends AbstractTableModel to allow you to be able to call custom methods of your model.
i.e.,
MyTableModel model = (MyTableModel)jTable1.getModel();
SomeCollection myKeyData = model.getMyKeyData();
Also, this statement:
I have recently created my own class to extend AbstractTableModel to be able to insert some logic on isCellEditable and setValueAt.
Doesn't make sense to me since you could always use a DefaultTableModel and simply override those two methods. But if you use a DefaultTableModel, don't also have it hold the 2D array of object as you're trying to do. Rather feed the data into its internal data via the appropriate constructor or via its addRow(...) method. Else you lose all the power that DefaultTableModel has to offer.
Edit
If you want to use a DefaultTableModel to leverage its methods, then you cannot use a separate data "nucleus" for your model (here your Object[][]), but instead must load your data into the model that is held inside of the DefaultTableModel super class. This can be done either via the correct super constructor or by adding rows of data using its addRow(...) method.
For example, here I load your data into a DefaultTableModel override:
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import javax.swing.*;
import javax.swing.table.*;
public class TableModelTest extends JPanel {
private static final Object[][] DATA = {
{ "1", "Station 1", new Integer(10), false, new Integer(0), Color.red },
{ "2", "Station 2", new Integer(10), false, new Integer(0), Color.blue },
{ "3", "Station 3", new Integer(10), false, new Integer(0),
Color.green },
{ "4", "Station 4", new Integer(10), false, new Integer(0),
Color.orange },
{ "5", "Station 5", new Integer(10), false, new Integer(0),
Color.black } };
private MyTableModel myTableModel = new MyTableModel(DATA);
private JTable table = new JTable(myTableModel);
public TableModelTest() {
setLayout(new BorderLayout());
add(new JScrollPane(table), BorderLayout.CENTER);
table.getColumnModel().getColumn(5)
.setCellRenderer(new ColorCellRenderer());
table.getColumnModel().getColumn(5).setCellEditor(new ColorCellEditor());
}
private static void createAndShowGui() {
TableModelTest mainPanel = new TableModelTest();
JFrame frame = new JFrame("TableModelTest");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(mainPanel);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGui();
}
});
}
}
class ColorCellEditor extends AbstractCellEditor implements TableCellEditor {
Color currentColor;
JButton button;
JColorChooser colorChooser;
JDialog dialog;
protected static final String EDIT = "edit";
public ColorCellEditor() {
ActionListener actionListener = new MyActionListener();
button = new JButton();
button.setActionCommand(EDIT);
button.addActionListener(actionListener);
button.setBorderPainted(false);
colorChooser = new JColorChooser();
dialog = JColorChooser.createDialog(button, "Pick a Color", true,
colorChooser, actionListener, null);
}
private class MyActionListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
if (EDIT.equals(e.getActionCommand())) {
button.setBackground(currentColor);
colorChooser.setColor(currentColor);
dialog.setVisible(true);
fireEditingStopped();
} else {
currentColor = colorChooser.getColor();
}
}
}
public Object getCellEditorValue() {
return currentColor;
}
public Component getTableCellEditorComponent(JTable table, Object value,
boolean isSelected, int row, int column) {
currentColor = (Color) value;
return button;
}
}
class ColorCellRenderer implements TableCellRenderer {
private static final int IMG_WIDTH = 70;
private static final int IMG_HEIGHT = 20;
private JLabel label = new JLabel();
#Override
public Component getTableCellRendererComponent(JTable table, Object value,
boolean arg2, boolean arg3, int arg4, int arg5) {
Color color = (Color) value;
BufferedImage img = new BufferedImage(IMG_WIDTH, IMG_HEIGHT,
BufferedImage.TYPE_INT_RGB);
Graphics g = img.getGraphics();
g.setColor(color);
g.fillRect(0, 0, IMG_WIDTH, IMG_HEIGHT);
g.dispose();
ImageIcon icon = new ImageIcon(img);
label.setIcon(icon);
return label;
}
}
class MyTableModel extends DefaultTableModel {
private static final String[] COLUMN_NAMES = { "Station #", "Name",
"avg Time", "Buffer", "Buffer Parts", "Color" };
public MyTableModel(Object[][] data) {
super(data, COLUMN_NAMES);
}
#Override
public boolean isCellEditable(int row, int col) {
if (col == 0) {
return false;
} else if (col == 4) {
boolean di = (Boolean) getValueAt(row, (col - 1));
if (!di) {
return false;
} else {
return true;
}
} else {
return true;
}
}
public void printDebugData() {
int numRows = getRowCount();
int numCols = getColumnCount();
for (int i = 0; i < numRows; i++) {
System.out.print(" row " + i + ":");
for (int j = 0; j < numCols; j++) {
Object datum = getValueAt(i, j);
// System.out.print(" " + data[i][j]);
System.out.print(" " + datum);
}
System.out.println();
}
System.out.println("--------------------------");
}
}

JTable row hightlighter based on value from TableCell

as I read that not possible to Encode my Navajo language
finging the way how to only alternate/striped Color into JTable (example #camickr)
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
public class TableRowRenderingTip extends JPanel {
private static final long serialVersionUID = 1L;
public TableRowRenderingTip() {
Object[] columnNames = {"Type", "Company", "Shares", "Price", "Boolean"};
Object[][] data = {
{"Buy", "IBM", new Integer(1000), new Double(80.5), Boolean.TRUE},
{"Sell", "Dell", new Integer(2000), new Double(6.25), Boolean.FALSE},
{"Short Sell", "Apple", new Integer(3000), new Double(7.35), Boolean.TRUE},
{"Buy", "MicroSoft", new Integer(4000), new Double(27.50), Boolean.FALSE},
{"Short Sell", "Cisco", new Integer(5000), new Double(20), Boolean.TRUE}
};
DefaultTableModel model = new DefaultTableModel(data, columnNames) {
private static final long serialVersionUID = 1L;
#Override
public Class getColumnClass(int column) {
return getValueAt(0, column).getClass();
}
};
JTabbedPane tabbedPane = new JTabbedPane();
tabbedPane.addTab("Alternating", createAlternating(model));
add(tabbedPane);
}
private JComponent createAlternating(DefaultTableModel model) {
JTable table = new JTable(model) {
private static final long serialVersionUID = 1L;
#Override
public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {
Component c = super.prepareRenderer(renderer, row, column);
if (!isRowSelected(row)) { // Alternate row color
c.setBackground(row % 2 == 0 ? getBackground() : Color.LIGHT_GRAY);
}
return c;
}
};
table.setPreferredScrollableViewportSize(table.getPreferredSize());
return new JScrollPane(table);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
createAndShowGUI();
}
});
}
public static void createAndShowGUI() {
JFrame.setDefaultLookAndFeelDecorated(false);
JFrame frame = new JFrame("Table Row Rendering");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TableRowRenderingTip());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
}
I have a JTable which contains some market trades (better for understanding by reason my poor English skills), but some of deals has only one leg, but another (for example vanilla Cross Currency Swap) could have two legs. How is possible to hightlighting TableRows based on value from specifics TableColumn (for example last column with name DealId). I tried to check row with row - 1 && row + 1, but my empty head generated lots of codesRow, to much for idea how to stop complicated simple simple things, how to check if there exist duplicate value in another row (always with strict ordering as captured in the pictures). No idea how to implements simple formula for that
pictures demonstrated:
generated from code:
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
public class TablePrepareRenderer extends JFrame {
private static final long serialVersionUID = 1L;
private Object[] columnNames = {
"Buy/Sell", "Type", "SubType", "Ccy1", "Amount1", "Ccy2", "Amount2", "DealId"};
private Object[][] data = {
{"Buy&Sell", "Ccy Swap", "A1", "EUR", new Double(1000000.00), "USD", new Double(1439000.00), 50},
{"Buy&Sell", "Ccy Swap", "A3", "USD", new Double(1438900.00), "EUR", new Double(1000000.00), 50},
{"Buy&Sell", "Ccy Swap", "A1", "EUR", new Double(500000.00), "CHF", new Double(550000.00), 350},
{"Buy&Sell", "Ccy Swap", "A1", "CHF", new Double(549800.00), "EUR", new Double(500000.00), 350},
{"Sell&Buy", "Ccy Swap", "A3", "USD", new Double(1000000.00), "EUR", new Double(749000.00), 2250},
{"Sell&Buy", "Ccy Swap", "A1", "EUR", new Double(748900.00), "USD", new Double(1000000.00), 2250},
{"Buy&Sell", "Ccy Swap", "A1", "GBP", new Double(1000000.00), "USD", new Double(1638100.00), 400},
{"Buy&Sell", "Ccy Swap", "A3", "USD", new Double(1638200.00), "GBP", new Double(1000000.00), 400},
{"Sell", "Ccy Spot", "A1", "AUD", new Double(343575.0), "EUR", new Double(250000.0), 11990},
{"Buy", "Ccy Spot", "A1", "EUR", new Double(100000.00), "JPY", new Double(1099000.00), 259},
{"Sell", "Ccy Fwd", "A3", "DKK", new Double(74889.00), "EUR", new Double(10000.00), 115439},};
private JTable table;
public TablePrepareRenderer() {
DefaultTableModel model = new DefaultTableModel(data, columnNames);
table = new JTable(model) {
private static final long serialVersionUID = 1L;
#Override
public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {
Component c = super.prepareRenderer(renderer, row, column);
JComponent jc = (JComponent) c;
/*if (!isRowSelected(row)) {
c.setBackground(getBackground());
int modelRow = convertRowIndexToModel(row);
String type = (String) getModel().getValueAt(modelRow, 0);
if (("Buy".equals(type)) && !("Buy&Sell".equals(type))) {
c.setBackground(Color.orange);
} else if (("Sell".equals(type)) && !("Sell&Buy".equals(type))) {
c.setBackground(Color.orange);
} else if ("Buy&Sell".equals(type)) {
c.setBackground(Color.yellow);
} else if ("Sell&Buy".equals(type)) {
c.setBackground(Color.yellow);
}
}*/
/*if (!isRowSelected(row)) {
if (row == 0 ||row == 1||row == 4||row == 6||row == 7||row == 9||row == 10) {
((JComponent) c).setBackground(Color.orange);
} else {
((JComponent) c).setBackground(Color.yellow);
}
}*/
if (!isRowSelected(row)) {
if (row == 0 || row == 1 || row == 4 || row == 5 || row == 8 || row == 10) {
((JComponent) c).setBackground(Color.orange);
} else {
((JComponent) c).setBackground(Color.yellow);
}
}
if (column == 0 || column == 1 || column == 2 || column == 3 || column == 5) {
//setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
//c.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
//(JComponent) c.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
}
return c;
}
#Override
public Class getColumnClass(int column) {
switch (column) {
case 0:
return String.class;
case 1:
return String.class;
case 2:
return String.class;
case 3:
return String.class;
case 4:
return Double.class;
case 5:
return String.class;
case 6:
return Double.class;
case 7:
return Integer.class;
}
return null;
}
};
table.setPreferredScrollableViewportSize(table.getPreferredSize());
JScrollPane scrollPane = new JScrollPane(table);
getContentPane().add(scrollPane);
}
public static void main(String[] args) {
TablePrepareRenderer frame = new TablePrepareRenderer();
frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
}
Edit:
how to set Alignment for TableCell into prepareRenderer,

how to set Alignment for TableCell into prepareRenderer,
This should NOT be done in the prepareRenderer code. This property should be set in the renderer for the class or for the column because it only applies to a specific class or renderer. Instead use:
table.setPreferredScrollableViewportSize(table.getPreferredSize());
DefaultTableCellRenderer stringRenderer = (DefaultTableCellRenderer)table.getDefaultRenderer(String.class);
stringRenderer.setHorizontalAlignment( SwingConstants.CENTER );
For the highlighting code I used code that assumes that the dealld value is unique for a given set of transactions:
private Map<Object, Color> rowColor = new HashMap<Object, Color>();
private Color nextColor = Color.ORANGE;
#Override
public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {
Component c = super.prepareRenderer(renderer, row, column);
JComponent jc = (JComponent) c;
if (isRowSelected(row)) return c;
Object value = table.getValueAt(row, 7);
Color background = rowColor.get(value);
if (background != null)
{
c.setBackground( background );
}
else
{
rowColor.put(value, nextColor);
c.setBackground( nextColor );
nextColor = (nextColor == Color.ORANGE) ? Color.YELLOW : Color.ORANGE;
}
return c;
}
Note: It won't work if sorting is required.
Here is another approach that should work even if sorting is required (but I didn't test it with sorting);
#Override
public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {
Component c = super.prepareRenderer(renderer, row, column);
JComponent jc = (JComponent) c;
if (!isRowSelected(row))
{
c.setBackground(getRowBackground(row));
}
return c;
}
private Color getRowBackground(int row)
{
boolean isDark = true;
Object previous = getValueAt(0, 7);
for (int i = 1; i <= row; i++)
{
Object current = getValueAt(i, 7);
if (! current.equals(previous))
{
isDark = !isDark;
previous = current;
}
}
return isDark ? Color.ORANGE : Color.YELLOW;
}

it's Sunday, wheather detoriating, so couldn't resist to show the SwingX version. It's the same logic as #camickr 2nd, thanks :-)
Advantages:
code can focus on logic as the value retrieving handles sorting/filtering/column moves automagically
knows about default ui alternate striping colors (and updates on switching the LAF)
Highlighter support is built-in, no need to subclass the table nor care about renderer misbehaviour
easy to add additional highlighters (yelling sell, sell, sell :-)
The code snipped:
JXTable table = new JXTable(data, columnNames);
HighlightPredicate predicate = new HighlightPredicate() {
#Override
public boolean isHighlighted(Component renderer,
ComponentAdapter adapter) {
if (adapter.row == 0) return false;
return isOddValue(adapter);
}
private boolean isOddValue(ComponentAdapter adapter) {
Object previous = adapter.getFilteredValueAt(0, 7);
boolean odd = false;
for (int i = 1; i <= adapter.row; i++) {
Object current = adapter.getFilteredValueAt(i, 7);
if (!previous.equals(current)) {
odd = !odd;
}
previous = current;
}
return odd;
}
};
table.addHighlighter(new UIColorHighlighter(predicate));

Filling data in JTable in netbeans

I want to change default data in JTable at runtime. I am using netbeans. I tried solution given here adding data to JTable when working with netbeans
jTable1.getModel().setValueAt(row, column, value);
but it gives me this error:

If you want to change it at runtime you need to decide when you want it changed and add the code to the proper method/event. As it stands you have a method call in your class definition, which is not valid code.
For instance
public void setTableModel(){
displayTable.getModel().setValueAt(2,4,300);
}
And then call setTableModel() at an appropriate time.

because you wrote this code line out of current Class, you have to wrap these code line(s)
inside Class/void/constructor, for example
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
public class TableProcessing extends JFrame implements TableModelListener {
private static final long serialVersionUID = 1L;
private JTable table;
public TableProcessing() {
String[] columnNames = {"Item", "Quantity", "Price", "Cost"};
Object[][] data = {
{"Bread", new Integer(1), new Double(1.11), new Double(1.11)},
{"Milk", new Integer(1), new Double(2.22), new Double(2.22)},
{"Tea", new Integer(1), new Double(3.33), new Double(3.33)},
{"Cofee", new Integer(1), new Double(4.44), new Double(4.44)}
};
DefaultTableModel model = new DefaultTableModel(data, columnNames);
model.addTableModelListener(this);
table = new JTable(model) {
private static final long serialVersionUID = 1L;
#Override
public Class getColumnClass(int column) {
return getValueAt(0, column).getClass();
}
#Override
public boolean isCellEditable(int row, int column) {
int modelColumn = convertColumnIndexToModel(column);
return (modelColumn == 3) ? false : true;
}
};
table.setPreferredScrollableViewportSize(table.getPreferredSize());
JScrollPane scrollPane = new JScrollPane(table);
getContentPane().add(scrollPane);
}
#Override
public void tableChanged(TableModelEvent e) {
if (e.getType() == TableModelEvent.UPDATE) {
int row = e.getFirstRow();
int column = e.getColumn();
System.out.println(row + " : " + column);
if (column == 1 || column == 2) {
int quantity = ((Integer) table.getModel().getValueAt(row, 1)).intValue();
double price = ((Double) table.getModel().getValueAt(row, 2)).doubleValue();
Double value = new Double(quantity * price);
table.getModel().setValueAt(value, row, 3);
}
}
}
public static void main(String[] args) {
TableProcessing frame = new TableProcessing();
frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
}