Delete row in JTable
Hello I am new To JAVA SWING
I have 2 questions related to JTable
1) How do i remove selected row in JTable ...for instance, I click on the row to delete (It is selected) , later I press the delete button, and then row is removed .... any hints ?
2) If I would like to save the rows in a JTable into a database , .... How can iterate through the rows in the JTable..each row .... the rows are saved in a List object...and a List Object is what I pass as a parameter in a class method in order to be saved into Database.
Thanks,
deibys
1) use the removeRow(...) method of the DefaultTableModel
20 use table.getModel().getValueAt(...) to get the data from the model and create your list Object.
Similar Messages
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Problem in adding/deleting rows in JTable
I am trying to add /remove rows from JTable whose first column is JButton and others are JComboBox's.If no rows are selected,new row is added at the end.If user selects some row & then presses insert button,new row is added below it.Rows can only be deleted if user has made some selection.Kindly help me,where i am making mistake.If any function is to be used.My code is as follows....
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.border.*;
public class JButtonTableExample extends JFrame implements ActionListener{
JComboBox mComboLHSType = new JComboBox();
JComboBox mComboRHSType = new JComboBox();
JLabel mLabelLHSType = new JLabel("LHS Type");
JLabel mLabelRHSType = new JLabel("RHS Type");
JButton mButtonDelete = new JButton("Delete");
JButton mButtonInsert = new JButton("Insert");
JPanel mPanelButton = new JPanel();
JPanel mPanelScroll = new JPanel();
JPanel mPanelCombo = new JPanel();
DefaultTableModel dm ;
JTable table;
int currentRow = -1;
static int mSelectedRow = -1;
public JButtonTableExample()
super( "JButtonTable Example" );
makeForm();
setSize( 410, 222 );
setVisible(true);
private void makeForm()
this.getContentPane().setLayout(null);
mPanelCombo.setLayout(null);
mPanelCombo.setBorder(new LineBorder(Color.red));
mPanelCombo.setBounds(new Rectangle(1,1,400,30));
mLabelLHSType.setBounds(new Rectangle(26,5,71,22));
mComboLHSType.setBounds(new Rectangle(83,5,100,22));
mLabelRHSType.setBounds(new Rectangle(232,5,71,22));
mComboRHSType.setBounds(new Rectangle(292,5,100,22));
mPanelCombo.add(mLabelLHSType,null);
mPanelCombo.add(mComboLHSType,null);
mPanelCombo.add(mLabelRHSType,null);
mPanelCombo.add(mComboRHSType,null);
mPanelScroll.setLayout(null);
mPanelScroll.setBorder(new LineBorder(Color.blue));
mPanelScroll.setBounds(new Rectangle(1,28,400,135));
mPanelButton.setLayout(null);
mPanelButton.setBorder(new LineBorder(Color.green));
mPanelButton.setBounds(new Rectangle(1,165,400,30));
mButtonInsert.setBounds(new Rectangle(120,5,71,22));
mButtonDelete.setBounds(new Rectangle(202,5,71,22));
mButtonDelete.addActionListener(this);
mButtonInsert.addActionListener(this);
mPanelButton.add(mButtonDelete,null);
mPanelButton.add(mButtonInsert,null);
dm = new DefaultTableModel();
//dm.setDataVector(null,
//new Object[]{"Button","Join","LHS","Operator","RHS"});
dm.setDataVector(new Object[][]{{"","","","",""}},
new Object[]{"","Join","LHS","Operator","RHS"});
table = new JTable(dm);
table.getTableHeader().setReorderingAllowed(false);
table.setRowHeight(25);
int columnWidth[] = {20,45,95,95,95};
TableColumnModel modelCol = table.getColumnModel();
for (int i=0;i<5;i++)
modelCol.getColumn(i).setPreferredWidth(columnWidth);
//modelCol.getColumn(0).setCellRenderer(new ButtonRenderer());
//modelCol.getColumn(0).setCellEditor(new ButtonEditor(new JCheckBox()));
modelCol.getColumn(0).setCellRenderer(new ButtonCR());
modelCol.getColumn(0).setCellEditor(new ButtonCE(new JCheckBox()));
modelCol.getColumn(0).setResizable(false);
setUpJoinColumn(modelCol.getColumn(1));
setUpLHSColumn(modelCol.getColumn(2));
setUpOperColumn(modelCol.getColumn(3));
setUpRHSColumn(modelCol.getColumn(4));
JScrollPane scroll = new JScrollPane(table);
scroll.setBounds(new Rectangle(1,1,400,133));
mPanelScroll.add(scroll,null);
this.getContentPane().add(mPanelCombo,null);
this.getContentPane().add(mPanelScroll,null);
this.getContentPane().add(mPanelButton,null);
}//end of makeForm()
public void actionPerformed(ActionEvent ae)
if (ae.getSource() == mButtonInsert)
//int currentRow = table.getSelectedRow();
currentRow = ButtonCE.selectedRow;
System.out.println("Before Insert CURRENT ROW"+currentRow);
if(currentRow == -1)
int rowCount = dm.getRowCount();
//mSelectedRow = rowCount-1;
//table.clearSelection();
dm.insertRow(rowCount,new Object[]{"","","","",""});
currentRow = -1;
ButtonCE.selectedRow = -1;
else
table.clearSelection();
dm.insertRow(currentRow+1,new Object[]{"","","","",""});
currentRow = -1;
ButtonCE.selectedRow = -1;
//System.out.println("After INSERT CURRENT ROW"+currentRow);
if(ae.getSource() == mButtonDelete)
//int currentRow = table.getSelectedRow();
currentRow = ButtonCE.selectedRow;
System.out.println("Before DELETE CURRENT ROW"+currentRow);
if(currentRow != -1)
dm.removeRow(currentRow);
table.clearSelection();
currentRow = -1;
ButtonCE.selectedRow = -1;
//System.out.println("Selected Row"+mSelectedRow);
else
JOptionPane.showMessageDialog(null, "Select row first", "alert", JOptionPane.ERROR_MESSAGE);
//System.out.println("DELETE CURRENT ROW"+currentRow);
public void setUpJoinColumn(TableColumn joinColumn)
//Set up the editor for the sport cells.
JComboBox comboBox = new JComboBox();
comboBox.addItem("AND");
comboBox.addItem("OR");
comboBox.addItem("NOT");
joinColumn.setCellEditor(new DefaultCellEditor(comboBox));
//Set up tool tips for the sport cells.
DefaultTableCellRenderer renderer =
new DefaultTableCellRenderer();
renderer.setToolTipText("Click for combo box");
joinColumn.setCellRenderer(renderer);
//Set up tool tip for the sport column header.
TableCellRenderer headerRenderer = joinColumn.getHeaderRenderer();
if (headerRenderer instanceof DefaultTableCellRenderer) {
((DefaultTableCellRenderer)headerRenderer).setToolTipText(
"Click the sport to see a list of choices");
public void setUpLHSColumn(TableColumn LHSColumn)
//Set up the editor for the sport cells.
JComboBox comboBox = new JComboBox();
comboBox.addItem("Participant1");
comboBox.addItem("Participant2");
comboBox.addItem("Variable1");
LHSColumn.setCellEditor(new DefaultCellEditor(comboBox));
//Set up tool tips for the sport cells.
DefaultTableCellRenderer renderer =
new DefaultTableCellRenderer();
renderer.setToolTipText("Click for combo box");
LHSColumn.setCellRenderer(renderer);
//Set up tool tip for the sport column header.
TableCellRenderer headerRenderer = LHSColumn.getHeaderRenderer();
if (headerRenderer instanceof DefaultTableCellRenderer) {
((DefaultTableCellRenderer)headerRenderer).setToolTipText(
"Click the sport to see a list of choices");
public void setUpOperColumn(TableColumn operColumn)
//Set up the editor for the sport cells.
JComboBox comboBox = new JComboBox();
comboBox.addItem("=");
comboBox.addItem("!=");
comboBox.addItem("Contains");
operColumn.setCellEditor(new DefaultCellEditor(comboBox));
//Set up tool tips for the sport cells.
DefaultTableCellRenderer renderer =
new DefaultTableCellRenderer();
renderer.setToolTipText("Click for combo box");
operColumn.setCellRenderer(renderer);
//Set up tool tip for the sport column header.
TableCellRenderer headerRenderer = operColumn.getHeaderRenderer();
if (headerRenderer instanceof DefaultTableCellRenderer) {
((DefaultTableCellRenderer)headerRenderer).setToolTipText(
"Click the sport to see a list of choices");
public void setUpRHSColumn(TableColumn rhsColumn)
//Set up the editor for the sport cells.
JComboBox comboBox = new JComboBox();
comboBox.addItem("Variable1");
comboBox.addItem("Constant1");
comboBox.addItem("Constant2");
rhsColumn.setCellEditor(new DefaultCellEditor(comboBox));
//Set up tool tips for the sport cells.
DefaultTableCellRenderer renderer =
new DefaultTableCellRenderer();
renderer.setToolTipText("Click for combo box");
rhsColumn.setCellRenderer(renderer);
//Set up tool tip for the sport column header.
TableCellRenderer headerRenderer = rhsColumn.getHeaderRenderer();
if (headerRenderer instanceof DefaultTableCellRenderer) {
((DefaultTableCellRenderer)headerRenderer).setToolTipText(
"Click the sport to see a list of choices");
public static void main(String[] args) {
JButtonTableExample frame = new JButtonTableExample();
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
//Button as a renderer for the table cells
class ButtonCR implements TableCellRenderer
JButton btnSelect;
public ButtonCR()
btnSelect = new JButton();
btnSelect.setMargin(new Insets(0,0,0,0));
public Component getTableCellRendererComponent(JTable table,Object value,boolean isSelected,boolean hasFocus,int row,int column)
if (column != 0) return null; //meany !!!
//System.out.println("Inside renderer########################Selected row");
//btnSelect.setText(value.toString());
//btnSelect.setIcon(new ImageIcon("capsigma.gif"));
return btnSelect;
}//end fo ButtonCR
//Default Editor for table
class ButtonCE extends DefaultCellEditor implements ActionListener
JButton btnSelect;
JTable table;
//Object val;
static int selectedRow = -1;
public ButtonCE(JCheckBox whoCares)
super(whoCares);
//this.row = row;
btnSelect = new JButton();
btnSelect.setMargin(new Insets(0,0,0,0));
btnSelect.addActionListener(this);
setClickCountToStart(1);
public Component getTableCellEditorComponent(JTable table,Object value,boolean isSelected,int row,int column)
if (column != 0) return null; //meany !!!
this.selectedRow = row;
this.table = table;
table.clearSelection();
System.out.println("Inside getTableCellEditorComponent");
return btnSelect;
//public Object getCellEditorValue()
//return val;
public void actionPerformed(ActionEvent e)
// Your Code Here...
System.out.println("Inside actionPerformed");
System.out.println("Action performed Row selected "+selectedRow);
btnSelect.setIcon(new ImageIcon("capsigma.gif"));
}//end of ButtonCEHi,
All the thing you have to do is to return a boolean for the column. JTable will use a checkbox (as default) to show boolean values. -
I went through the tutorial of JDK about how to programming JTable, i can NOT find a way to add/delete row into/from JTable.
I immagine it would be a difficult task because the data set it takes 'Object data[][]' is NOT dynamically grow/shrinkble.
Can we make it take ArrayList[] as input dataset so that the dataset can dynamically grow/shrink?
Any other way around to add/delete row?
THANKS for your consideration.You have to write your own TableModel like extending AbstractTableModel. In that class add custom methods to add and remove rows. From those methods call fireTableRowsDeleted(..) and fireTableRowsInserted(..) to update UI.
-
Problem in deleting Rows of JTable after sorting it
Hi all,
I'm getting problems in Removing Row(s) after sorting a JTable.
Please find the code snippets at this URL. Thanks for your time...
http://forum.java.sun.com/thread.jsp?forum=31&thread=459736&start=15&range=15&hilite=false&q=Hi Abhijeet,
I tried it the way you said using
wdContext.nodeBirhtday_List().nodeItab().moveFirst();
// loop backwards to avoid index troubles
for (int i = n - 1; i >= 0; --i)
current_date = wdContext.nodeBirhtday_List().nodeItab().currentItabElement().getGbdat().getDate();
current_month = wdContext.nodeBirhtday_List().nodeItab().currentItabElement().getGbdat().getMonth();
if (( current_date != date_today ) && ( current_month != month_today ))
wdContext.nodeBirhtday_List().nodeItab().removeElement(wdContext.nodeBirhtday_List().nodeItab().
getElementAt(i));
wdContext.nodeBirhtday_List().nodeItab().moveNext();
It adds records...
According to Valerys Solution, the IPrivate<CustomController> doesnt show me the required nodes. and gives me 'Unable to resolve' error.
Can you please suggest where I am going wrong
Regards
Abdullah -
Hello
I use a JTable with a custom table model that extends javax.swing.table.DefaultTableModel.
I haven't overwrote the method
public void removeRow(int row)Now when i use this method the rows always get removed from the end. It doesn't matter which value the parameter row has.
Even when i call
myTableModel.removeRow( 0 );it removes the rows at the end of the table.
It would be nice if someone could help me with this.
Regards, MichelleIt's not so easy to do this because it's a big project, but here is the code of the table model.
import javax.swing.table.*;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import java.util.*;
public class AssignmentsTableModel2 extends DefaultTableModel implements TableModelListener
static final long serialVersionUID = 41L;
public AssignmentsTableModel2(String[][] arg1, String[] arg2)
super(arg1, arg2);
public Vector getColumnIdentifiers()
return columnIdentifiers;
@Override
public int getColumnCount()
return this.columnIdentifiers.size();
@Override
public int getRowCount()
return this.dataVector.size();
@Override
public String getColumnName(int col)
return (String)this.columnIdentifiers.elementAt( col );
@Override
public Object getValueAt(int rowIndex, int columnIndex)
return ((Vector)this.dataVector.elementAt( rowIndex )).elementAt( columnIndex );
@Override
public void setValueAt( Object val, int rowIndex, int columnIndex )
((Vector)this.dataVector.elementAt( rowIndex )).set( columnIndex, val);
fireTableCellUpdated( rowIndex, columnIndex );
@Override
public void tableChanged(TableModelEvent e)
@Override
public void setColumnIdentifiers(Vector columnIdentifiers)
super.setColumnIdentifiers(columnIdentifiers);
@Override
public void removeRow(int row)
this.dataVector.remove(row);
System.out.println(row + " to remove");
this.fireTableStructureChanged();
//super.removeRow(row);
}I need the model to change the background color of the cells at runtime and I now overwrote the removeRow() method, but it's still the same problem.
Also I have a custom JTable class that colours the TableHeader of the selected column.
class PaintedTable extends JTable {
private static final long serialVersionUID = 1L;
PaintedTable(AssignmentsTableModel2 atm)
super(atm);
setOpaque(false);
((JComponent) getDefaultRenderer(Object.class)).setOpaque(false);
@Override
public void paintComponent(Graphics g)
//System.out.println("paint table");
Color background = new Color(168, 210, 241);
Color controlColor = new Color(230, 240, 230);
int width = getWidth();
int height = getHeight();
Graphics2D g2 = (Graphics2D) g;
Paint oldPaint = g2.getPaint();
g2.setPaint(new GradientPaint(0, 0, background, width, 0, controlColor));
g2.fillRect(0, 0, width, height);
g2.setPaint(oldPaint);
for (int row : getSelectedRows())
Rectangle start = getCellRect(row, 0, true);
Rectangle end = getCellRect(row, getColumnCount() - 1, true);
g2.setPaint(new GradientPaint(start.x, 0, Color.orange, (int) ((end.x + end.width - start.x) * 1.25), 0, controlColor));
g2.fillRect(start.x, start.y, end.x + end.width - start.x, start.height);
//System.out.println("rect: (" + start.x + ", " + start.y + ") + (" + (end.x + end.width - start.x) + ", " + start.height +")");
super.paintComponent(g);
public boolean isCellEditable(int rowIndex, int colIndex)
return false;
AssignmentsTableModel2 atm = new AssignmentsTableModel2(this.columnValues, this.columnHeaders);
PaintedTable table = new PaintedTable( this.atm ); -
Delete Multiple Rows of JTable by selecting JCheckboxes
Hi,
I want delete rows of JTable that i select through JCheckbox on clicking on JButton. The code that i am using is deleting one row at a time. I want to delete multiple rows at a time on clicking on Button.
This is the code i m using
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
public class TableTest extends JFrame implements ActionListener
JButton btnAdd;
BorderLayout layout;
DefaultTableModel model;
JTable table;JButton btexcluir;
public static void main(String[] args)
TableTest app = new TableTest();
app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
public TableTest()
super("Table Example");
btnAdd = new JButton("Add");
btnAdd.addActionListener(this);
model = new DefaultTableModel()
public Class getColumnClass(int col)
switch (col)
case 1 :
return Boolean.class;
default :
return Object.class;
table = new JTable(model);
table.setPreferredSize(new Dimension(250,200));
// Create a couple of columns
model.addColumn("Col1");
model.addColumn("Col2");
JCheckBox cbox = new JCheckBox();
// Append a row
JPanel painel = new JPanel();
model.addRow(new Object[] { "v1",new Boolean(false)});
model.addRow(new Object[] { "v3", new Boolean(false)});
JScrollPane scrollPane = new JScrollPane(table);
scrollPane.createVerticalScrollBar();
btexcluir= new JButton("Excluir");
btexcluir.addActionListener(this);
painel.add(btexcluir);
painel.add(btnAdd);
getContentPane().add(scrollPane, BorderLayout.NORTH);
getContentPane().add(painel, BorderLayout.SOUTH);
setSize(600, 600);
setVisible(true);
public void actionPerformed(ActionEvent e) {
if (e.getSource() == btnAdd)
model.addRow(new Object[] { "Karl", new Boolean(false)});
if (e.getSource()==btexcluir){
for (int i=0; i <=model.getRowCount(); i++){
if (model.getValueAt(i,1)==Boolean.FALSE)
JOptionPane.showMessageDialog(null, "No lines to remove!!");
else if(model.getValueAt(i,1)==Boolean.TRUE)
model.removeRow(i);
}Please reply me with code help.
Thanks
NitinHi,
Thanks for ur support. My that problem is solved now. One more problem now . Initially i want that delete button disabled. When i select any checkbox that button should get enabled. how can i do that ?
Thanks
Nitin -
Problem of deletion of rows in jtable, table refreshing too
Hi,
I have a table with empty rows in the beginning with some custom properties( columns have fixed width...), later user would be adding to the rows to this table and can delete, I've a problem while deleting the rows from table,
When a selected row is deleted the model is also deleting the data but the table(view) is not refreshed.
Actually i'm selecting a cell of a row, then hitting the delete button.
So the model is deleting the information, but i'm not able to c the fresh data in table( especially when the last cell of last row is selectd and hit the delete button, i am getting lots of exception)
Kindly copy the below code and execute it, and let me know,
* AuditPanel.java
* Created on August 30, 2002, 3:05 AM
import javax.swing.*;
import java.awt.*;
import javax.swing.table.*;
import java.awt.event.*;
import javax.swing.event.*;
import java.util.Vector;
* @author yaman
public class AuditPanel extends javax.swing.JPanel {
// These are the combobox values
private String[] acceptenceOptions;
private Vector colNames;
private Color rowSelectionBackground = Color.yellow;
private int rowHeight = 20;
private int column0Width =70;
private int column1Width =96;
private int column2Width =327;
private javax.swing.JPanel jPanel2;
private javax.swing.JPanel jPanel1;
private javax.swing.JButton jButton2;
private javax.swing.JButton jButton1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTable jTable1;
/** Creates new form AuditPanel */
public AuditPanel() {
public void renderPanel(){
initComponents();
public String[] getAcceptenceOptions(){
return acceptenceOptions;
public void setAcceptenceOptions(String[] acceptenceOptions){
this.acceptenceOptions = acceptenceOptions;
public Vector getColumnNames(){
return colNames;
public void setColumnNames(Vector colNames){
this.colNames = colNames;
public Vector getData(){
Vector dataVector = new Vector();
/*dataVector.add(null);
dataVector.add(null);
dataVector.add(null);
return dataVector;
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
private void initComponents() {
java.awt.GridBagConstraints gridBagConstraints;
jPanel2 = new javax.swing.JPanel();
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
jPanel1 = new javax.swing.JPanel();
jTable1 = new javax.swing.JTable();
setLayout(new java.awt.GridBagLayout());
setBorder(new javax.swing.border.EmptyBorder(0,0,0,0));
jPanel2.setLayout(new java.awt.GridBagLayout());
jPanel2.setBorder(new javax.swing.border.EmptyBorder(0,0,0,0));
jButton1.setText("Add");
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
gridBagConstraints.ipadx = 8;
gridBagConstraints.insets = new java.awt.Insets(0, 1, 5, 0);
gridBagConstraints.anchor = java.awt.GridBagConstraints.EAST;
jPanel2.add(jButton1, gridBagConstraints);
jButton2.setText("Delete");
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 0;
gridBagConstraints.gridy = 1;
gridBagConstraints.anchor = java.awt.GridBagConstraints.EAST;
jPanel2.add(jButton2, gridBagConstraints);
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 2;
gridBagConstraints.gridy = 0;
gridBagConstraints.insets = new java.awt.Insets(0, 5, 0, 0);
gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTH;
add(jPanel2, gridBagConstraints);
jPanel1.setLayout(new java.awt.GridBagLayout());
jPanel1.setBorder(new javax.swing.border.BevelBorder(javax.swing.border.BevelBorder.LOWERED, Color.black, Color.gray) );
jTable1.setModel(new javax.swing.table.DefaultTableModel(getData(), getColumnNames()));
// get all the columns and set the column required properties
java.util.Enumeration enum = jTable1.getColumnModel().getColumns();
while (enum.hasMoreElements()) {
TableColumn column = (TableColumn)enum.nextElement();
if( column.getModelIndex() == 0 ) {
column.setPreferredWidth(column0Width);
column.setCellEditor( new ValidateCellDataEditor(true) );
if( column.getModelIndex() == 1) {
column.setPreferredWidth(column1Width);
column.setCellEditor(new AcceptenceComboBoxEditor(getAcceptenceOptions()));
// If the cell should appear like a combobox in its
// non-editing state, also set the combobox renderer
//column.setCellRenderer(new AcceptenceComboBoxRenderer(getAcceptenceOptions()));
if( column.getModelIndex() == 2 ) {
column.setPreferredWidth(column2Width); // width of column
column.setCellEditor( new ValidateCellDataEditor(false) );
jScrollPane1 = new javax.swing.JScrollPane(jTable1);
jScrollPane1.setPreferredSize(new java.awt.Dimension(480, 280));
jTable1.setMinimumSize(new java.awt.Dimension(60, 70));
//jTable1.setPreferredSize(new java.awt.Dimension(300, 70));
//jScrollPane1.setViewportView(jTable1);
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTH;
jPanel1.add(jScrollPane1, gridBagConstraints);
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 0;
gridBagConstraints.gridy = 0;
add(jPanel1, gridBagConstraints);
// set the row height
jTable1.setRowHeight(rowHeight);
// set selection color
jTable1.setSelectionBackground(rowSelectionBackground);
// set the single selection
jTable1.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
// avoid table header to resize/ rearrange
jTable1.getTableHeader().setReorderingAllowed(false);
jTable1.getTableHeader().setResizingAllowed(false);
// Table header font
jTable1.getTableHeader().setFont( new Font( jTable1.getFont().getName(),Font.BOLD,jTable1.getFont().getSize() ) );
jButton1.setMnemonic(KeyEvent.VK_A);
// action of add button
jButton1.addActionListener( new ActionListener(){
public void actionPerformed(ActionEvent actionEvent){
// If a button press is the trigger to leave a JTable cell and save the data in model
if(jTable1.isEditing() ){
//System.out.println("table is edition ");
String text=((javax.swing.text.JTextComponent)jTable1.getEditorComponent()).getText();
jTable1.setValueAt(text,jTable1.getSelectedRow(),jTable1.getSelectedColumn()) ;
jTable1.getCellEditor().cancelCellEditing();
// find out total available rows
int totalRows = jTable1.getRowCount();
int cols = jTable1.getModel().getColumnCount();
if( jTable1.getModel() instanceof DefaultTableModel ) {
((DefaultTableModel)jTable1.getModel()).addRow(new Object[cols]);
int newRowCount = jTable1.getRowCount();
// select the first row
jTable1.getSelectionModel().setSelectionInterval(newRowCount-1,newRowCount-1);
jButton2.setMnemonic(KeyEvent.VK_D);
// action of Delete button
jButton2.addActionListener( new ActionListener(){
public void actionPerformed(ActionEvent actionEvent){
int totalRows = jTable1.getRowCount();
// If there are more than one row in table then delete it
if( totalRows > 0){
int selectedOption = JOptionPane.showConfirmDialog(null,"Are you sure you want to delete this audit row?","Coeus", JOptionPane.YES_NO_OPTION);
// if Yes then selectedOption is 0
// if No then selectedOption is 1
if(0 == selectedOption ){
// get the selected row
int selectedRow = jTable1.getSelectedRow();
System.out.println("Selected Row "+selectedRow);
if( selectedRow != -1 ){
DefaultTableModel dm= (DefaultTableModel)jTable1.getModel();
java.util.Vector v1=dm.getDataVector();
System.out.println("BEFOE "+v1);
v1.remove(selectedRow);
jTable1.removeRowSelectionInterval(selectedRow,selectedRow);
System.out.println("After "+v1);
}else{
// show the error message
JOptionPane.showMessageDialog(null, "Please Select an audit Row", "Coeus", JOptionPane.ERROR_MESSAGE);
} // end of initcomponents
class AcceptenceComboBoxRenderer extends JComboBox implements TableCellRenderer {
public AcceptenceComboBoxRenderer(String[] items) {
super(items);
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
if (isSelected) {
setForeground(table.getSelectionForeground());
super.setBackground(rowSelectionBackground);
} else {
setForeground(table.getForeground());
setBackground(table.getBackground());
// Select the current value
setSelectedItem(value);
return this;
class AcceptenceComboBoxEditor extends DefaultCellEditor {
public AcceptenceComboBoxEditor(String[] items) {
super(new JComboBox(items));
} // end editor class
public class ValidateCellDataEditor extends AbstractCellEditor implements TableCellEditor {
// This is the component that will handle the editing of the
// cell value
JComponent component = new JTextField();
boolean validate;
public ValidateCellDataEditor(boolean validate){
this.validate = validate;
// This method is called when a cell value is edited by the user.
public Component getTableCellEditorComponent(JTable table, Object value,
boolean isSelected, int rowIndex, int vColIndex) {
if (isSelected) {
component.setBackground(rowSelectionBackground);
// Configure the component with the specified value
JTextField tfield =(JTextField)component;
// if any vaidations to be done for this cell
if(validate){
//tfield.setDocument(new JTextFieldFilter(JTextFieldFilter.NUMERIC,4));
tfield.setText( ((String)value));
// Return the configured component
return component;
// This method is called when editing is completed.
// It must return the new value to be stored in the cell.
public Object getCellEditorValue() {
return ((JTextField)component).getText();
// This method is called just before the cell value
// is saved. If the value is not valid, false should be returned.
public boolean stopCellEditing() {
String s = (String)getCellEditorValue();
return super.stopCellEditing();
public void itemStateChanged(ItemEvent e) {
super.fireEditingStopped();
}//end of ValidateCellDataEditor class
public static void main(String args[]){
JFrame frame = new JFrame();
AuditPanel auditPanel = new AuditPanel();
frame.getContentPane().add(auditPanel);
auditPanel.setAcceptenceOptions(new String[]{"Accepted", "Rejected", "Requested"} );
java.util.Vector colVector = new java.util.Vector();
colVector.add("Fiscal Year");
colVector.add("Audit Accepted");
colVector.add("Comment" );
auditPanel.setColumnNames( colVector);
auditPanel.renderPanel();
frame.pack();
frame.show();Hi,
I've got the solution for it. As when the cursor is in cell of
a row and hit the delete button, the data in that cell is not saved,
So i'm trying to save the data first into the model then firing the action event by doing this ..
jButton2.addActionListener( new ActionListener(){
public void actionPerformed(ActionEvent actionEvent){
// If a button press is the trigger to leave a JTable cell and save the data in model
if(jTable1.isEditing() ){
String text=((javax.swing.text.JTextComponent)jTable1.getEditorComponent()).getText();
jTable1.setValueAt(text,jTable1.getSelectedRow(),jTable1.getSelectedColumn()) ;
jTable1.getCellEditor().cancelCellEditing();
// HERE DO THE DELETE ROW OPERATION
<yaman/> -
Problem deleting rows from a JTable
I've got an editable JTable and a button outside that deletes rows selected by a user from the model. The problem is that if the user has clicked on an editable cell in the table, while rest of the information in that row is deleted, the entry in the editable cell remains. So even though the entry has been deleted from the model, the JTable does not update correctly. I am using a custom editor/renderer for the editable cells.
So it appears that I need to get my custom editor to release, i.e., stop editing on demand, so I can reset the information on the entire row properly.
Any ideas how I can do so ?
Thanks, BhishmaThanks that worked perfectly ! Full points assigned.
In case the above link stops working the solution that worked for me was using a client property as below.
jTable1.putClientProperty("terminateEditOnFocusLost", Boolean.TRUE);
Ciao.
Edited by: Bhishma on Dec 20, 2008 7:53 PM -
Hello,
I've got a JTable which is based on a 2-dimensional array, which contains my data. Now I want to delete several rows from the JTable. There's the possibility to modify my data-array by creating a new array which doesn't contain anymore the datasets I want to delete. Afterwards I can redraw the table and my rows are deleted. But I think that's a very complicated way to delete rows from a JTable. Can anybody tell me whether ther's an easier way to do so ? I'd really be pleased...
Thanx,
FindusWhen you create a TableModel using a two-dimensional array or a Vector of Vectors, a DefaultTableModel is created and it stores the data in its own Vector of Vectors. The DefaultTableModel supports methods for adding/removing rows of data. To remove the first row in the table you would do something like:
DefaultTableModel model = (DefaultTableModel)table.getModel();
model.removeRow( 0 );
Note: once you create the TableModel you should set your array to null as it is not used anymore. -
How do i delete multiple rows in JTable
hello
how i delete multiple rows in JTable
when i selected multiple rows from the jtable and delete its give the error ArrayIndexOutOfBoundException
e.g.
int rows[]=jtable.getSelectedRows();
for(int i=0;i<rows.length;i++)
DefaultTableModel model=(DefaultTableModel)jtable.getModel();
model.removeRow(rows);
like this
please help me
merajYou are trying to remove the rows an equal times to the amount of rows selected.
You should remove one row at a time:
model.removeRow(rows);
Change your code into this.
for(int i=0;i<rows.length;i++)
DefaultTableModel model=(DefaultTableModel)jtable.getModel();
model.removeRow(rows[i]); -
JTable & AbstractTableModel(Delete row problem)
Hi!!
I have used AbstractTableModel in my JTable.In case of multiple rows, i want to delete rows from interface as well as from database. As removeRow method is absent in AbstractTableModel.so DefaultTableModel has been used by casting but CastClassException throws. Here is Partial code(tried in many ways).Plz help me to solve the problem.
void jButtonCancel_actionPerformed(ActionEvent e) {
try{
jTable1.setModel(myModel); //jtable is object of JTable and myModel is of Abstract TableModel
DefaultTableModel model=((DefaultTableModel)jTable1.getModel());
int row=jTable1.getSelectedRow();
if(row>=0){
model.removeRow();
jTable1.revalidate();
model.fireTableDataChanged();
System.out.println("Rows Delete");
catch(Exception sq){
sq.printStackTrace();
sq.getMessage();Hmm...
A bit of studying java awaits you.
Anyway.
Your class:
public class MyModel extends AbstractTableModel
// Do various sorts of coding here
}Is not an instance of DefaultTableModel, so, if you try to cast your model to a DefaultTableModel it will throw an exception since the conversion is impossible.
Recomended solution:
Add a remove method for your class MyModel that does the following:
public void removeRow(int row)
// data removed
// fire removed data event
}Then instead of casting to DefaultTableModel, cast it to 'MyModel' and call the method 'removeRow'.
When it comes to inheritance and casting you can always cast an object to any of it's superclasses or any of the interfaces it supplies or it's superclasses suppplies. You can not cast an object to a instance of which it has no relation with.
In you example, your table model class extends the abstract table model but it does not extend the DefaultTableModel. An instance of your class can be casted to AbstractTableModel and so can an DefaultTableModel because they are both subclasses from AbstractTableModel. They can also be casted to TableModel since all of these implement the interface needed to fullfill TableModel's specification.
If you cast a DefaultTableModel instance to TableModel you can not try to cast it upwards to something the instance wasn't from the beginning.
Example:
DefaultTableModel dtm = new DefaultTableModel();
// When you do casting uppwards, there is no need for paranthesis
TableModel tm = dtm;
// You can easily later on cast this back to what is what or to any step
// in between
DefaultTableModel stillSameModel = (DefaultTableModel)tm;
// You can not however cast to something the instance never was
// Row below will cause an compile error:
JComboBox jb = (JComboBox)dtm;
// This since JComboBox can never be an superclass to the DefaultModel
// More dangerous errors that can't be catched until runtime is the
// one you made. Ie: I do what could be an valid cast
MyModel mm = (MyModel)tm;
// Since MyModel is an TableModel and tm refers to an TableModel,
// this casting is approved by the compiler.
// It will on the other hand throw an ClassCastException when run since
// the variable tm contains an instance of DefaultTableModel which
// is not an MyModel instance.Recomended that you read up on inheritance and basic OO.
Regards,
Peter Norell -
Delete rows from table...Bizarre problem.
Folks
i HAVE this bizarre problem.
I hava a Java class which displays data read into a table with a delete
option by the side of each row.
Now lets assume you have 3 rows in the Table.
abc deleteButton
efg deleteButton
xyz deleteButton
When I click the first delete,that row gets deleted from the table.(perfect...)
Now I have 2 rows.
When I click on the first row,I get the error
'You clicked -1'
java.lang.ArrayIndexOutofBoundsException: -1 < 0.
Can anyone tell me why this is happening even though there are rows in the table.???
ActionListener al = new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println("You clicked row : " + table.getSelectedRow());
javax.swing.table.TableModel model = table.getModel();
Object o = model.getValueAt(table.getSelectedRow(),0);
//System.out.print(model.getValueAt(table.getSelectedRow(), 0));
//System.out.println();
MyDeleteFunction(o.toString());
// Delete row from window.
((DefaultTableModel)table.getModel()).removeRow(table.getSelectedRow());
table.revalidate();
table.repaint();Hi ritu,
This class is called
new DisplayCall_IDTodisconnect(hashTable);
its a long file.
its attached below.
The rows are displayed by reading a hashtable into a vector
and the vector is iterated and appended..
public class DisplayCall_IDToDisconnect {
public static JTable createTable(Vector data, String buttonLabel, ActionListener action){
return createTable(data.iterator(), buttonLabel, action);
public static JTable createTable(
Iterator dataIterator,
String buttonLabel,
ActionListener action) {
DefaultTableModel model = new DefaultTableModel() {
public boolean isCellEditable(int row, int col) {
return col == 1;
model.setColumnCount(2);
while (dataIterator.hasNext()) {
Object[] row = { dataIterator.next().toString(), null };
model.addRow(row);
DefaultTableColumnModel columnModel = new DefaultTableColumnModel();
columnModel.addColumn(new TableColumn(0, 100));
columnModel.addColumn(new TableColumn(1, 80,
new TableButtonCellRenderer(buttonLabel),
new TableButtonCellEditor(buttonLabel, action)
JTable table = new JTable(model, columnModel) {
public void valueChanged(ListSelectionEvent e) {
super.valueChanged(e);
table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
return table;
private static class TableButtonCellRenderer implements TableCellRenderer {
final JButton button;
TableButtonCellRenderer(String buttonLabel) {
button = new JButton(buttonLabel);
public Component getTableCellRendererComponent(
JTable table,
Object value,
boolean isSelected,
boolean hasFocus, int row, int column) {
return button;
private static class TableButtonCellEditor
extends AbstractCellEditor
implements TableCellEditor, ActionListener {
final JButton button;
final ActionListener callback;
TableButtonCellEditor(String buttonLabel, ActionListener callback) {
button = new JButton(buttonLabel);
this.callback = callback;
button.addActionListener(this);
public Component getTableCellEditorComponent(
JTable table,
Object value,
boolean isSelected,
int row, int column) {
return button;
public Object getCellEditorValue() {
return null;
public void actionPerformed(ActionEvent e) {
button.getParent().requestFocus();
callback.actionPerformed(e);
static JTable table;
Vector items;
final ClientManager clientMgr;
// Constructor.
public DisplayCall_IDToDisconnect(Hashtable callLegTable,ClientManager clientMgr){
Vector vCSeqnos = displayCSeqNos(callLegTable);
this.clientMgr = clientMgr;
JFrame frame = new JFrame("Disconnect Options");
/*Vector*/ items = new Vector();
Enumeration vEnum = vCSeqnos.elements();
while(vEnum.hasMoreElements()){
items.add(vEnum.nextElement());
ActionListener al = new ActionListener() {
public void actionPerformed(ActionEvent e) {
//System.out.println("You clicked row ,col: " + table.getSelectedRow()+
// table.getSelectedColumn());
javax.swing.table.TableModel model = table.getModel();
Object o = model.getValueAt(table.getSelectedRow(),0);
System.out.print(model.getValueAt(table.getSelectedRow(), 0));
System.out.println();
closeConnection(o.toString());
// Delete row from window too.
((DefaultTableModel)table.getModel()).removeRow(table.getSelectedRow());
table.revalidate();
table = DisplayCSeqNos.createTable(items, "Disconnect", al);
frame.getContentPane().add(new JScrollPane(table));
frame.pack();
frame.show();
} // End Constructor.
public void closeConnection(String s){
/*1. Disconnect the current session*/
this.clientMgr.disconnectCall(s);
/*2. refresh the Disconnect window*/
this.refreshWindow();
public Vector displayCSeqNos(Hashtable callLegTable){
Enumeration eNum;
String str;
Vector v = new Vector();
eNum=callLegTable.keys();
while(eNum.hasMoreElements()){
str = (String) eNum.nextElement();
//System.out.println("Key : " + str + " Value : " + callLegTable.get(str));
v.addElement(str);
return v;
} // End of displayCSeqNos. -
I know how to shade alternate rows in a JTable but what I am wanting to do is to compare the string values of the first column of each row and as long as they are the same I want all those rows to be one color. Then when they are diffent I want the color to switch. Anyone have any ideas? Below is code on how to sade alternate rows. Do I have to define a TableCellRender for every cell in the table?
// This table shades every other row yellow
JTable table = new JTable() {
public Component prepareRenderer(TableCellRenderer renderer,
int rowIndex, int vColIndex) {
Component c = super.prepareRenderer(renderer, rowIndex, vColIndex);
if (rowIndex % 2 == 0 && !isCellSelected(rowIndex, vColIndex)) {
c.setBackground(Color.yellow);
} else {
// If not shaded, match the table's background
c.setBackground(getBackground());
return c;
};For about the 5th time, Swing related questions should be posted in the Swing forum.
but what I am wanting to do is to compare the string values of the first column
of each row and as long as they are the same I want all those rows to be one
color. Then when they are diffent I want the color to switchNot enough information to answer the question. But I guess thats to be expected from someone who can't even remember the correct forum to post in. Can rows be added/deleted? Can the data be edited? Obviously a static table is easier to handle that a dynamic table.
I don't think you can define a TableCellEditor for each cell? Can you? Sure, you can, but whats a cell editor got to do with a rendering problem? -
Help with adding rows to JTable
Could any body help me with the following problem:
I have created form where I use JTable.Initially I should show 5 rows in JTable. User can enter data into the cells.And commit I should store the data in database.
My problem is how to dynamically add rows to JTable as user is entering the data. And how to retain the data in the cells when it is entered.
Right now when user edits a cell and tabs to next one the data in previous cell disappears.
Its Urgent can anybody help me
Thanks in advance
BabuThe number of rows, number of columns, etc, are all determined by the TableModel used in the JTable.
What is the easiest solution is to subclass AbstractTableModel adding methods to support your dynamic row adding/deleting/etc that you need. If you go to the javadoc for JTable, there's a link to a tutorial which contains most of what you need to know.
- David -
How to add or delete rows in tablecontrol?
Hi,
I am using a tablecontrol to enter data records.
I want to use 2 buttons, one to insert a row into a tablecontrol and another to delete a selected row of a tablecontrol.
How do I insert or delete rows of a tablecontrol?
Thanks.Hi Kumar,
Please look at the below sections......
ADDING BLANK LINES
To add blank lines to table control we do not need to change any of the fields of the structure CXTAB_CONTROL simply adding blank lines to the internal table will do.
INSERT INITIAL LINE INTO itab.
DELETING SELECTED ROWS
Deletion of selected rows is simple. To delete selected rows first we will determine the rows which have been selected through selection column .
FOR SINGLE ROW SELECTION
IF mark EQ 'X' . "mark is the name of selection column field
DELETE itab FROM workarea .
ENDIF.
FOR MULTIPLE ROW SELECTION
*To deetermine the rows selected we will use the selection column field to loop
*through the internal table.
LOOP AT itab WHERE mark EQ 'X'. "mark is the name of selection column field
DELETE itab " and is part of the internal table .
ENDLOOP.
Thanks,
Ravi Kanth
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