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JAVA JTable datamodel columns names bug

I have the following "sample" code almost, but the column names dissapiared after ~2 hours codeing and i cant find where.
Can somebody tell me why the datamodel doesnt add the column names to the JTable?
My code:
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.DefaultListSelectionModel;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
class MyTableModel extends JPanel {
private static final int CHECK_COL = 3;
private static Object[][] DATA = {
{"","","",false},{"","","",false},{"","","",false},{"","","",false},
{"","","",false},{"","","",false},{"","","",false},{"","","",false},
{"","","",false},{"","","",false},{"","","",false},{"","","",false},
{"","","",false},{"","","",false},{"","","",false},{"","","",false},
{"","","",false},{"","","",false},{"","","",false},{"","","",false},
{"","","",false},{"","","",false},{"","","",false},{"","","",false},
{"","","",false},{"","","",false},{"","","",false},{"","","",false},
{"","","",false},{"","","",false},{"","","",false},{"","","",false}
};
public static String[] COLUMNS = {"Debtid","Nev","VHO", "Check"};
protected DataModel dataModel = new DataModel(DATA, COLUMNS);
private JTable table = new JTable(dataModel);
private DefaultListSelectionModel selectionModel;
public MyTableModel(){
super(new BorderLayout());
this.add(table);
this.add(new ControlPanel(), BorderLayout.SOUTH);
table.setPreferredScrollableViewportSize(new Dimension(250, 175));
selectionModel = (DefaultListSelectionModel) table.getSelectionModel();
}
private class DataModel extends DefaultTableModel {
public DataModel(Object[][] data, Object[] COLUMNS) {
super(data, COLUMNS);
}
#Override
public Class<?> getColumnClass(int columnIndex) {
if (columnIndex == CHECK_COL) {
return getValueAt(0, CHECK_COL).getClass();
}
return super.getColumnClass(columnIndex);
}
#Override
public boolean isCellEditable(int row, int column) {
return true;
}
}
private class ControlPanel extends JPanel {
/**
*
*/
private static final long serialVersionUID = -7342459414751761853L;
public ControlPanel() {
this.add(new JLabel("Selection:"));
this.add(new JButton(new SelectionAction("Clear", false)));
this.add(new JButton(new SelectionAction("Check", true)));
}
}
private class SelectionAction extends AbstractAction {
boolean value;
public SelectionAction(String name, boolean value) {
super(name);
this.value = value;
}
#Override
public void actionPerformed(ActionEvent e) {
for (int i = 0; i < dataModel.getRowCount(); i++) {
if (selectionModel.isSelectedIndex(i)) {
dataModel.setValueAt(value, i, CHECK_COL);
}
}
}
}
public void setValueAt_Cell(String val, int row, int col) {
// TODO Auto-generated method stub
if(row==DATA.length){
DATA=cloneArray(DATA);
}
dataModel.setValueAt(val, row, col);
}
public static Object[][] cloneArray(Object[][] src) {
int length = src.length;
Object[][] target = new Object[length+1][src[0].length];
for (int i = 0; i < length; i++) {
System.arraycopy(src[i], 0, target[i], 0, src[i].length);
}
target[length] = new Object[]{"","","",false};
return target;
}
public String getValAtPos(int row,int col) {
//System.out.println(dataModel.getValueAt(row, col));
return dataModel.getValueAt(row, col).toString();
}
public int getRowCount(){
return DATA.length;
}
}

You need to wrap JTable with JScrollPane : this.add(new JScrollPane(table));.

The Auto Completion For JTable Using J2s [Auto complete ComboBox] Not Working

With refrence To The Question! By abg and answer By mKorBel.
And Using J2s Auto Complete Combo Box!
The Code in the Answer By mKorBel For My Case Is Not Working When I use Item Class instead of String for ArrayList items.
Vector<Vector<String>> comboData=util.GetComboData();
ArrayList<String> listSomeString = util.GetListForComboBox(comboData);
Java2sAutoComboBox comboBox = new Java2sAutoComboBox(listSomeString);
comboBox.setDataList(listSomeString);
column.setCellEditor(new DefaultCellEditor(comboBox));
The Code For Function GetListForComboBox is as follows
public ArrayList GetListForComboBox(Vector<Vector<String>> comboData) {
//Vector model = new Vector();
ArrayList<Item_> listSomeString = new ArrayList<Item_>();
try {
String strdata;
for (int i = 0; i < comboData.size(); i++) {
String id = comboData.get(i).elementAt(0).toString();
if (comboData.get(i).elementAt(1) != null) {
strdata = comboData.get(i).elementAt(1).toString();
} else {
strdata = "";
}
Item_ it = new Item_(id, strdata);
//model.addElement(it);
listSomeString.add(it);
}
} catch (Exception ex) {
ex.printStackTrace();
}
return listSomeString;
}
The Code for Item_ class is as follows
public class Item_
{
private String description;
private String id;
public Item_( String id,String description)
{
this.description = description;
this.id = id;
}
public String getId()
{ return id;
}
public String getDescription()
{ return description;
}
public String toString()
{ return description;
}
public void setDescription(String desc)
{ description=desc;
}
}

no idea, have to create an HashMap or MutableComboBoxModel, because AutoComplete is strictly based on Array, have to change constructor
my curiosity about Bug (I can't be able to simulating this issue), is presented from this code too (disable comboBox.setRenderer(new ItemRenderer());)
import java.awt.BorderLayout;
import javax.swing.DefaultCellEditor;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JList;
import javax.swing.plaf.basic.BasicComboBoxRenderer;
public class TableRenderDemo extends JPanel {
private static final long serialVersionUID = 1L;
public TableRenderDemo() {
super(new BorderLayout(5, 5));
final JTable table = new JTable(new MyTableModel());
table.setPreferredScrollableViewportSize(table.getPreferredSize());
table.setFillsViewportHeight(true);
table.setRowHeight(20);
JScrollPane scrollPane = new JScrollPane(table);
initColumnSizes(table);
setUpSportColumn(table, table.getColumnModel().getColumn(2));
add(scrollPane, BorderLayout.CENTER);
JButton resetButton = new JButton("Reset to default");
resetButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
for (int i = 0; i < table.getRowCount(); i++) {
table.getModel().setValueAt("None of the above", i, 2);
}
}
});
add(resetButton, BorderLayout.SOUTH);
}
private void initColumnSizes(JTable table) {
MyTableModel model = (MyTableModel) table.getModel();
TableColumn column = null;
Component comp = null;
int headerWidth = 0;
int cellWidth = 0;
Object[] longValues = model.longValues;
TableCellRenderer headerRenderer = table.getTableHeader().getDefaultRenderer();
for (int i = 0; i < 5; i++) {
column = table.getColumnModel().getColumn(i);
comp = headerRenderer.getTableCellRendererComponent(null, column.getHeaderValue(), false, false, 0, 0);
headerWidth = comp.getPreferredSize().width;
comp = table.getDefaultRenderer(model.getColumnClass(i)).getTableCellRendererComponent(table, longValues[i], false, false, 0, i);
cellWidth = comp.getPreferredSize().width;
column.setPreferredWidth(Math.max(headerWidth, cellWidth));
}
}
private void setUpSportColumn(JTable table, TableColumn sportColumn) {
ArrayList<String> listSomeString = new ArrayList<String>();
listSomeString.add("Snowboarding");
listSomeString.add("Rowing");
listSomeString.add("Knitting");
listSomeString.add("Speed reading");
listSomeString.add("Pool");
listSomeString.add("None of the above");
JComboBox comboBox = new JComboBox();
comboBox.addItem(new Item(1, "-"));
comboBox.addItem(new Item(2, "Snowboarding"));
comboBox.addItem(new Item(3, "Rowing"));
comboBox.addItem(new Item(4, "Knitting"));
comboBox.addItem(new Item(5, "Speed reading"));
comboBox.addItem(new Item(6, "Pool"));
comboBox.addItem(new Item(7, "None of the above"));
comboBox.setMaximumRowCount(3);
comboBox.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JComboBox comboBox = (JComboBox) e.getSource();
Item item = (Item) comboBox.getSelectedItem();
System.out.println(item.getId() + " : " + item.getDescription());
}
});
comboBox.setRenderer(new ItemRenderer());
sportColumn.setCellEditor(new DefaultCellEditor(comboBox));
DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
renderer.setToolTipText("Click for combo box");
sportColumn.setCellRenderer(renderer);
}
class ItemRenderer extends BasicComboBoxRenderer {
#Override
public Component getListCellRendererComponent(JList list, Object value,
int index, boolean isSelected, boolean cellHasFocus) {
super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
if (value != null) {
Item item = (Item) value;
setText(item.getDescription().toUpperCase());
}
if (index == -1) {
Item item = (Item) value;
setText("" + item.getId());
}
return this;
}
}
class Item {
private int id;
private String description;
public Item(int id, String description) {
this.id = id;
this.description = description;
}
public int getId() {
return id;
}
public String getDescription() {
return description;
}
#Override
public String toString() {
return description;
}
}
class MyTableModel extends AbstractTableModel {
private static final long serialVersionUID = 1L;
private String[] columnNames = {"First Name", "Last Name", "Sport", "# of Years", "Vegetarian"};
private Object[][] data = {{"Kathy", "Smith", "Snowboarding", new Integer(5), false},
{"John", "Doe", "Rowing", new Integer(3), true}, {"Sue", "Black", "Knitting", new Integer(2), false},
{"Jane", "White", "Speed reading", new Integer(20), true}, {"Joe", "Brown", "Pool", new Integer(10), false}};
public final Object[] longValues = {"Jane", "Kathy", "None of the above", new Integer(20), Boolean.TRUE};
#Override
public int getColumnCount() {
return columnNames.length;
}
#Override
public int getRowCount() {
return data.length;
}
#Override
public String getColumnName(int col) {
return columnNames[col];
}
#Override
public Object getValueAt(int row, int col) {
return data[row][col];
}
#Override
public Class<?> getColumnClass(int c) {
return getValueAt(0, c).getClass();
}
#Override
public boolean isCellEditable(int row, int col) {
if (col < 2) {
return false;
} else {
return true;
}
}
#Override
public void setValueAt(Object value, int row, int col) {
data[row][col] = value;
fireTableCellUpdated(row, col);
System.out.println("New value of data: " + getValueAt(row, col));
}
}
private static void createAndShowGUI() {
JFrame frame = new JFrame("TableRenderDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
TableRenderDemo newContentPane = new TableRenderDemo();
frame.setContentPane(newContentPane);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
createAndShowGUI();
}
});
}
}

have to play with Caret (quick implementations for Caret, sorry too lazy, without any idea), otherwise all editor is selected, backspace selected 1st Item by default
import java.awt.BorderLayout;
import javax.swing.DefaultCellEditor;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import java.awt.Component;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.util.ArrayList;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFormattedTextField;
import javax.swing.JList;
import javax.swing.JTextField;
import javax.swing.plaf.basic.BasicComboBoxRenderer;
import javax.swing.text.JTextComponent;
public class TableRenderDemo extends JPanel {
private static final long serialVersionUID = 1L;
public TableRenderDemo() {
super(new BorderLayout(5, 5));
final JTable table = new JTable(new MyTableModel());
table.setPreferredScrollableViewportSize(table.getPreferredSize());
table.setFillsViewportHeight(true);
JScrollPane scrollPane = new JScrollPane(table);
initColumnSizes(table);
setUpSportColumn(table, table.getColumnModel().getColumn(2));
add(scrollPane, BorderLayout.CENTER);
JButton resetButton = new JButton("Reset to default");
resetButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
for (int i = 0; i < table.getRowCount(); i++) {
table.getModel().setValueAt("None of the above", i, 2);
}
}
});
add(resetButton, BorderLayout.SOUTH);
}
private void initColumnSizes(JTable table) {
MyTableModel model = (MyTableModel) table.getModel();
TableColumn column = null;
Component comp = null;
int headerWidth = 0;
int cellWidth = 0;
Object[] longValues = model.longValues;
TableCellRenderer headerRenderer = table.getTableHeader().getDefaultRenderer();
for (int i = 0; i < 5; i++) {
column = table.getColumnModel().getColumn(i);
comp = headerRenderer.getTableCellRendererComponent(null, column.getHeaderValue(), false, false, 0, 0);
headerWidth = comp.getPreferredSize().width;
comp = table.getDefaultRenderer(model.getColumnClass(i)).getTableCellRendererComponent(table, longValues[i], false, false, 0, i);
cellWidth = comp.getPreferredSize().width;
column.setPreferredWidth(Math.max(headerWidth, cellWidth));
}
}
private void setUpSportColumn(JTable table, TableColumn sportColumn) {
ArrayList<String> listSomeString = new ArrayList<String>();
listSomeString.add("-");
listSomeString.add("Snowboarding");
listSomeString.add("Rowing");
listSomeString.add("Knitting");
listSomeString.add("Speed reading");
listSomeString.add("Pool");
listSomeString.add("None of the above");
AutoComboBox comboBox = new AutoComboBox(listSomeString);
comboBox.setDataList(listSomeString);
comboBox.setMaximumRowCount(3);
comboBox.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JComboBox comboBox = (JComboBox) e.getSource();
System.out.println(comboBox.getSelectedItem());
}
});
JTextComponent editor = ((JTextField) comboBox.getEditor().getEditorComponent());
editor.setCaretPosition(editor.getCaretPosition());
editor.moveCaretPosition(0);
editor.addFocusListener(focsListener);
sportColumn.setCellEditor(new DefaultCellEditor(comboBox));
DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
renderer.setToolTipText("Click for combo box");
sportColumn.setCellRenderer(renderer);
}
private FocusListener focsListener = new FocusListener() {
#Override
public void focusGained(FocusEvent e) {
dumpInfo(e);
}
#Override
public void focusLost(FocusEvent e) {
//dumpInfo(e);
}
private void dumpInfo(FocusEvent e) {
//System.out.println("Source : " + name(e.getComponent()));
//System.out.println("Opposite : " + name(e.getOppositeComponent()));
//System.out.println("Temporary: " + e.isTemporary());
final Component c = e.getComponent();
if (c instanceof JFormattedTextField) {
EventQueue.invokeLater(new Runnable() {
public void run() {
((JFormattedTextField) c).requestFocus();
((JFormattedTextField) c).setText(((JFormattedTextField) c).getText());
((JFormattedTextField) c).selectAll();
}
});
} else if (c instanceof JTextField) {
EventQueue.invokeLater(new Runnable() {
public void run() {
((JTextField) c).requestFocus();
((JTextField) c).setText(((JTextField) c).getText());
((JTextField) c).selectAll();
}
});
}
}
private String name(Component c) {
return (c == null) ? null : c.getName();
}
};
class ItemRenderer extends BasicComboBoxRenderer {
#Override
public Component getListCellRendererComponent(JList list, Object value,
int index, boolean isSelected, boolean cellHasFocus) {
super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
if (value != null) {
}
if (index == -1) {
}
return this;
}
}
class MyTableModel extends AbstractTableModel {
private static final long serialVersionUID = 1L;
private String[] columnNames = {"First Name", "Last Name", "Sport", "# of Years", "Vegetarian"};
private Object[][] data = {{"Kathy", "Smith", "Snowboarding", new Integer(5), false},
{"John", "Doe", "Rowing", new Integer(3), true}, {"Sue", "Black", "Knitting", new Integer(2), false},
{"Jane", "White", "Speed reading", new Integer(20), true}, {"Joe", "Brown", "Pool", new Integer(10), false}};
public final Object[] longValues = {"Jane", "Kathy", "None of the above", new Integer(20), Boolean.TRUE};
#Override
public int getColumnCount() {
return columnNames.length;
}
#Override
public int getRowCount() {
return data.length;
}
#Override
public String getColumnName(int col) {
return columnNames[col];
}
#Override
public Object getValueAt(int row, int col) {
return data[row][col];
}
#Override
public Class<?> getColumnClass(int c) {
return getValueAt(0, c).getClass();
}
#Override
public boolean isCellEditable(int row, int col) {
if (col < 2) {
return false;
} else {
return true;
}
}
#Override
public void setValueAt(Object value, int row, int col) {
data[row][col] = value;
fireTableCellUpdated(row, col);
System.out.println("New value of data: " + getValueAt(row, col));
}
}
private static void createAndShowGUI() {
JFrame frame = new JFrame("TableRenderDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
TableRenderDemo newContentPane = new TableRenderDemo();
frame.setContentPane(newContentPane);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
createAndShowGUI();
}
});
}
}

I know this is an old question but in case it can help someone out there, here is how to do what OP asked:
In Java2sAutoCombobox, replace the function setSelectedValue(Object obj) by this one instead:
void setSelectedValue(String str)
{
if(!isFired)
{
Object objectToSelect = null;
for(Object obj: getDataList())
{
if( obj.toString().equals(str) )
{
objectToSelect = obj;
break;
}
}
isFired = true;
setSelectedItem(objectToSelect);
fireItemStateChanged(new ItemEvent(this, 701, selectedItemReminder,
1));
isFired = false;
}
}
By doing this, JComboBox.setSelectedItem() will select the object from the datalist instead of its string representation.

JTable with titled rows and columns

How can I have a JTable with both columns & rows have title?
something like this:
+------+------+------+------+
|/\/\/\| col1 | col2 | col3 |
+------+------+------+------+
| row1 | | | |
+------+------+------+------+
| row2 | | | |
+------+------+------+------+
| row3 | | | |
+------+------+------+------+
Thanks

I think that you searching RowTable
import java.awt.*;
import java.awt.event.ActionEvent;
import javax.swing.*;
import javax.swing.UIManager.*;
import javax.swing.event.*;
import javax.swing.table.*;
public class JTableRowHeader {
private JFrame frame = new JFrame("JTable RowHeader");
private JScrollPane scrollPane;
private JTable table;
private DefaultTableModel model;
private TableRowSorter<TableModel> sorter;
private JTable headerTable;
public JTableRowHeader() {
table = new JTable(4, 4);
for (int i = 0; i < table.getRowCount(); i++) {
table.setValueAt(i, i, 0);
}
sorter = new TableRowSorter<TableModel>(table.getModel());
table.setRowSorter(sorter);
model = new DefaultTableModel() {
private static final long serialVersionUID = 1L;
#Override
public int getColumnCount() {
return 1;
}
#Override
public boolean isCellEditable(int row, int col) {
return false;
}
#Override
public int getRowCount() {
return table.getRowCount();
}
#Override
public Class<?> getColumnClass(int colNum) {
switch (colNum) {
case 0:
return String.class;
default:
return super.getColumnClass(colNum);
}
}
};
headerTable = new JTable(model);
for (int i = 0; i < table.getRowCount(); i++) {
headerTable.setValueAt("Row " + (i + 1), i, 0);
}
headerTable.setShowGrid(false);
headerTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
headerTable.setPreferredScrollableViewportSize(new Dimension(50, 0));
headerTable.getColumnModel().getColumn(0).setPreferredWidth(50);
headerTable.getColumnModel().getColumn(0).setCellRenderer(new TableCellRenderer() {
#Override
public Component getTableCellRendererComponent(JTable x, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
boolean selected = table.getSelectionModel().isSelectedIndex(row);
Component component = table.getTableHeader().getDefaultRenderer().getTableCellRendererComponent(table, value, false, false, -1, -2);
((JLabel) component).setHorizontalAlignment(SwingConstants.CENTER);
if (selected) {
component.setFont(component.getFont().deriveFont(Font.BOLD));
component.setForeground(Color.red);
} else {
component.setFont(component.getFont().deriveFont(Font.PLAIN));
}
return component;
}
});
table.getRowSorter().addRowSorterListener(new RowSorterListener() {
#Override
public void sorterChanged(RowSorterEvent e) {
model.fireTableDataChanged();
}
});
table.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
#Override
public void valueChanged(ListSelectionEvent e) {
model.fireTableRowsUpdated(0, model.getRowCount() - 1);
}
});
scrollPane = new JScrollPane(table);
scrollPane.setRowHeaderView(headerTable);
table.setPreferredScrollableViewportSize(table.getPreferredSize());
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.add(scrollPane);
frame.add(new JButton(new AbstractAction("Toggle filter") {
private static final long serialVersionUID = 1L;
private RowFilter<TableModel, Object> filter = new RowFilter<TableModel, Object>() {
#Override
public boolean include(javax.swing.RowFilter.Entry<? extends TableModel, ? extends Object> entry) {
return ((Number) entry.getValue(0)).intValue() % 2 == 0;
}
};
#Override
public void actionPerformed(ActionEvent e) {
if (sorter.getRowFilter() != null) {
sorter.setRowFilter(null);
} else {
sorter.setRowFilter(filter);
}
}
}), BorderLayout.SOUTH);
frame.pack();
frame.setLocation(150, 150);
frame.setVisible(true);
}
public static void main(String[] args) {
try {// UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
if (info.getName().equals("Nimbus")) {
UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (Exception e) {
//e.printStackTrace();
}
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
JTableRowHeader TestTableRowHeader = new JTableRowHeader();
}
});
}
}

Row header and table value are desynchronized in solution from mKorbel. The table displays Row 1 and Row 2 instead of Row 1 and Row 3 when filtered.
Here is a solution based on his example. It duplicates row header into a new column in the table, hide this column and copy values to the other one when filtered.
It works and it's ugly, we need a better solution from someone :)
import java.awt.*;
import java.awt.event.ActionEvent;
import javax.swing.*;
import javax.swing.UIManager.*;
import javax.swing.event.*;
import javax.swing.table.*;
public class JTableRowHeader {
private JFrame frame = new JFrame("JTable RowHeader");
private JScrollPane scrollPane;
private JTable table;
private DefaultTableModel model;
private TableRowSorter<TableModel> sorter;
private JTable headerTable;
public JTableRowHeader() {
table = new JTable(4, 5);
for (int i = 0; i < table.getRowCount(); i++) {
table.setValueAt("Row " + (i + 1), i, 0);
table.setValueAt(i, i, 1);
}
sorter = new TableRowSorter<TableModel>(table.getModel());
table.setRowSorter(sorter);
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
model = new DefaultTableModel() {
private static final long serialVersionUID = 1L;
#Override
public int getColumnCount() {
return 1;
}
#Override
public boolean isCellEditable(int row, int col) {
return false;
}
#Override
public int getRowCount() {
return table.getRowCount();
}
#Override
public Class<?> getColumnClass(int colNum) {
switch (colNum) {
case 0:
return String.class;
default:
return super.getColumnClass(colNum);
}
}
};
headerTable = new JTable(model);
for (int i = 0; i < table.getRowCount(); i++) {
headerTable.setValueAt("Row " + (i + 1), i, 0);
}
headerTable.setShowGrid(false);
headerTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
headerTable.setPreferredScrollableViewportSize(new Dimension(50, 0));
headerTable.getColumnModel().getColumn(0).setPreferredWidth(50);
headerTable.getColumnModel().getColumn(0).setCellRenderer(new TableCellRenderer() {
#Override
public Component getTableCellRendererComponent(JTable x, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
boolean selected = table.getSelectionModel().isSelectedIndex(row);
Component component = table.getTableHeader().getDefaultRenderer().getTableCellRendererComponent(table, value, false, false, -1, -2);
((JLabel) component).setHorizontalAlignment(SwingConstants.CENTER);
if (selected) {
component.setFont(component.getFont().deriveFont(Font.BOLD));
component.setForeground(Color.red);
} else {
component.setFont(component.getFont().deriveFont(Font.PLAIN));
}
return component;
}
});
table.getRowSorter().addRowSorterListener(new RowSorterListener() {
#Override
public void sorterChanged(RowSorterEvent e) {
model.fireTableDataChanged();
for (int i = 0; i < table.getRowCount(); i++) {
headerTable.setValueAt(table.getValueAt(i, 0), i, 0);
}
}
});
table.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
#Override
public void valueChanged(ListSelectionEvent e) {
model.fireTableRowsUpdated(0, model.getRowCount() - 1);
}
});
TableColumnModel columnModel = table.getColumnModel();
TableColumn column = columnModel.getColumn(0);
column.setMinWidth(0);
column.setMaxWidth(0);
column.setPreferredWidth(0);
AdjusterTableColumn columnAdjuster = new AdjusterTableColumn(table);
columnAdjuster.adjustColumns();
scrollPane = new JScrollPane(table);
scrollPane.setRowHeaderView(headerTable);
table.setPreferredScrollableViewportSize(table.getPreferredSize());
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.add(scrollPane);
frame.add(new JButton(new AbstractAction("Toggle filter") {
private static final long serialVersionUID = 1L;
private RowFilter<TableModel, Object> filter = new RowFilter<TableModel, Object>() {
#Override
public boolean include(javax.swing.RowFilter.Entry<? extends TableModel, ? extends Object> entry) {
return ((Number) entry.getValue(1)).intValue() % 2 == 0;
}
};
#Override
public void actionPerformed(ActionEvent e) {
if (sorter.getRowFilter() != null) {
sorter.setRowFilter(null);
} else {
sorter.setRowFilter(filter);
}
}
}), BorderLayout.SOUTH);
frame.pack();
frame.setLocation(150, 150);
frame.setVisible(true);
}
public static void main(String[] args) {
try {// UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
if (info.getName().equals("Nimbus")) {
UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (Exception e) {
//e.printStackTrace();
}
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
JTableRowHeader TestTableRowHeader = new JTableRowHeader();
}
});
}
}

JTable use Row Numbers?

I am creating a program to work like Microsoft Excel, in JAVA. My problem is how do I put the row numbers beside each row of the JTable? I have seen it working in other Java Programs - I just can not figure out how to include it in mine. Google gave me this website, and apparently it works. When I use it in my program this nothing happen. :/
I there a better way of adding row numbers in a JTable?
I have looked at the Java Tutorials already.
I am sorry if this question has been asked before.

There exists simple solution for that, and looks like as #camickr is more complex, (by Walter or Darryl from forums.sun.com)
import java.awt.*;
import java.awt.event.ActionEvent;
import javax.swing.*;
import javax.swing.UIManager.*;
import javax.swing.event.*;
import javax.swing.table.*;
public class TestTableRowTable {
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
if (info.getName().equals("Nimbus")) {
UIManager.setLookAndFeel(info.getClassName());
break;
}
}
// UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception e1) {
e1.printStackTrace();
}
final JTable table = new JTable(10, 6);
for (int i = 0; i < table.getRowCount(); i++) {
table.setValueAt(i, i, 0);
}
final TableRowSorter<TableModel> sorter = new TableRowSorter<TableModel>(table.getModel());
table.setRowSorter(sorter);
final AbstractTableModel model = new AbstractTableModel() {
private static final long serialVersionUID = 1L;
#Override
public int getColumnCount() {
return 1;
}
#Override
public Object getValueAt(int row, int column) {
return table.convertRowIndexToModel(row);
}
#Override
public int getRowCount() {
return table.getRowCount();
}
};
JTable headerTable = new JTable(model);
headerTable.setShowGrid(false);
headerTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
headerTable.setPreferredScrollableViewportSize(new Dimension(30, 0));
headerTable.getColumnModel().getColumn(0).setPreferredWidth(30);
headerTable.getColumnModel().getColumn(0).setCellRenderer(new TableCellRenderer() {
#Override
public Component getTableCellRendererComponent(JTable x, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
boolean selected = table.getSelectionModel().isSelectedIndex(row);
Component component = table.getTableHeader().getDefaultRenderer().getTableCellRendererComponent(table, value, false, false, -1, -2);
((JLabel) component).setHorizontalAlignment(JLabel.CENTER);
if (selected) {
component.setFont(component.getFont().deriveFont(Font.BOLD));
} else {
component.setFont(component.getFont().deriveFont(Font.PLAIN));
}
return component;
}
});
table.getRowSorter().addRowSorterListener(new RowSorterListener() {
#Override
public void sorterChanged(RowSorterEvent e) {
model.fireTableDataChanged();
}
});
table.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
#Override
public void valueChanged(ListSelectionEvent e) {
model.fireTableRowsUpdated(0, model.getRowCount() - 1);
}
});
JScrollPane pane = new JScrollPane(table);
pane.setRowHeaderView(headerTable);
JFrame frame = new JFrame("Test");
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.getContentPane().add(pane);
frame.getContentPane().add(new JButton(new AbstractAction("Toggle filter") {
private static final long serialVersionUID = 1L;
private RowFilter<TableModel, Object> filter = new RowFilter<TableModel, Object>() {
#Override
public boolean include(javax.swing.RowFilter.Entry<? extends TableModel, ? extends Object> entry) {
return ((Number) entry.getValue(0)).intValue() % 2 == 0;
//return ((String) entry.getValue(0)).length()>0 ;
//return ((Date) entry.getValue(0)).getTime()< ;
}
};
#Override
public void actionPerformed(ActionEvent e) {
if (sorter.getRowFilter() != null) {
sorter.setRowFilter(null);
} else {
sorter.setRowFilter(filter);
}
}
}), BorderLayout.PAGE_END);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
private TestTableRowTable() {
}
}

How to auto select the last inserted row in JTable?

Since JTable could be sorted.
How do I set it auto select the last inserted row whenever a row is inserted?
Thanks

your TableModel can retun number of rows, and new/added could be last by using convertRowIndexToView you can get row in TableView, then pass to the changeSelection
public void changeSelection(int rowIndex, int columnIndex, boolean toggle, boolean extend)
EDIT: example (for enjoy harcoded numbersOfRows - 3 instead of correct numbersOfRows - 1):
import java.awt.*;
import java.awt.event.ActionEvent;
import javax.swing.*;
import javax.swing.UIManager.LookAndFeelInfo;
import javax.swing.event.*;
import javax.swing.table.*;
public class TestTableRowTable {
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
// UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
if (info.getName().equals("Nimbus")) {
UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (Exception e1) {
e1.printStackTrace();
}
final JTable table = new JTable(10, 6);
for (int i = 0; i < table.getRowCount(); i++) {
table.setValueAt(i, i, 0);
}
final TableRowSorter<TableModel> sorter = new TableRowSorter<TableModel>(table.getModel());
table.setRowSorter(sorter);
final AbstractTableModel model = new AbstractTableModel() {
private static final long serialVersionUID = 1L;
#Override
public int getColumnCount() {
return 1;
}
#Override
public Object getValueAt(int row, int column) {
return table.convertRowIndexToModel(row);
}
#Override
public int getRowCount() {
return table.getRowCount();
}
};
JTable headerTable = new JTable(model);
headerTable.setShowGrid(false);
headerTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
headerTable.setPreferredScrollableViewportSize(new Dimension(30, 0));
headerTable.getColumnModel().getColumn(0).setPreferredWidth(30);
headerTable.getColumnModel().getColumn(0).setCellRenderer(new TableCellRenderer() {
#Override
public Component getTableCellRendererComponent(JTable x, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
boolean selected = table.getSelectionModel().isSelectedIndex(row);
Component component = table.getTableHeader().getDefaultRenderer().getTableCellRendererComponent(table, value, false, false, -1, -2);
((JLabel) component).setHorizontalAlignment(JLabel.CENTER);
if (selected) {
component.setFont(component.getFont().deriveFont(Font.BOLD));
} else {
component.setFont(component.getFont().deriveFont(Font.PLAIN));
}
return component;
}
});
table.getRowSorter().addRowSorterListener(
new RowSorterListener() {
#Override
public void sorterChanged(RowSorterEvent e) {
model.fireTableDataChanged();
}
});
table.getSelectionModel().addListSelectionListener(
new ListSelectionListener() {
#Override
public void valueChanged(ListSelectionEvent e) {
model.fireTableRowsUpdated(0, model.getRowCount() - 1);
}
});
JScrollPane pane = new JScrollPane(table);
pane.setRowHeaderView(headerTable);
JFrame frame = new JFrame("Test");
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.getContentPane().add(pane);
frame.getContentPane().add(new JButton(new AbstractAction("Toggle filter") {
private static final long serialVersionUID = 1L;
private RowFilter<TableModel, Object> filter = new RowFilter<TableModel, Object>() {
#Override
public boolean include(javax.swing.RowFilter.Entry<? extends TableModel, ? extends Object> entry) {
return ((Number) entry.getValue(0)).intValue() % 2 == 0;
//return ((String) entry.getValue(0)).length()>0 ;
//return ((Date) entry.getValue(0)).getTime()< ;
}
};
#Override
public void actionPerformed(ActionEvent e) {
if (sorter.getRowFilter() != null) {
sorter.setRowFilter(null);
TableModel tblModel = table.getModel();
int numbersOfRows = 0;
numbersOfRows = tblModel.getRowCount();
int lastRow = 0;
lastRow = table.convertRowIndexToView(numbersOfRows - 3);
table.changeSelection(lastRow, 0, false, false);
} else {
sorter.setRowFilter(filter);
}
}
}), BorderLayout.PAGE_END);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
private TestTableRowTable() {
}
}

It is hard to answer,because you haven't provided any code, but, if you use some model of JTable you can write some adapter for method insert, I mean for public void insertRow(int row, Vector rowData). Here is present number of row, using this number you can select row. Do you know how to select row ?