Reposting - JTextArea inside Jtable - Tab, Focus issues

Question

Sorry for reposting this again...I didn't format the code in my previous post.
I am facing the following problems with JTextArea inside Jtable Cell
1. blinking cursor not visible on the cell(0,0) first time the UI is shown, although it has the focus
2. blinking cursor not visible on the 5th column (JTextArea) when it receives the focus nor the characters are visible when i start typing. i have to manually double click to force the focus to shift to the cell.
3. focus does not shit out of the 5th column (JTextArea) after pressing the tab key or enter key once. i have to do that twice to force the focus out.
Following is the code which i have implemented. Please let me know what is being missed out to rectify the above problems.
Thanks.
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.BorderFactory;
import javax.swing.DefaultCellEditor;
import javax.swing.InputMap;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
public class test extends JFrame {
     JTable table;
     public test() {
          table = new JTable(15, 5) {
               public boolean isCellEditable(int row, int column) {
                    return column % 2 == 0;
                    // return true;
               public void changeSelection(final int row, final int column,
                         boolean toggle, boolean extend) {
                    super.changeSelection(row, column, toggle, extend);
                    if (editCellAt(row, column)) {
                         getEditorComponent().requestFocusInWindow();
          table.setPreferredScrollableViewportSize(table.getPreferredSize());
          table.putClientProperty("terminateEditOnFocusLost", Boolean.TRUE);
          TextAreaRenderer textAreaRenderer = new TextAreaRenderer();
          TextAreaEditor textEditor = new TextAreaEditor();
          table.getColumnModel().getColumn(4).setCellRenderer(textAreaRenderer);
          table.getColumnModel().getColumn(4).setCellEditor(textEditor);
          JTextField tf = new JTextField();
          tf.setBorder(BorderFactory.createEmptyBorder());
          table.setDefaultEditor(Object.class, new DefaultCellEditor((tf)));
          JScrollPane scrollPane = new JScrollPane(table);
          DefaultCellEditor dce = (DefaultCellEditor) table
                    .getDefaultEditor(Object.class);
          dce.setClickCountToStart(1);
          getContentPane().add(scrollPane);
          InputMap im = table
                    .getInputMap(JTable.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
          // Have the enter key work the same as the tab key
          KeyStroke tab = KeyStroke.getKeyStroke(KeyEvent.VK_TAB, 0);
          KeyStroke enter = KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0);
          im.put(enter, im.get(tab));
          // Disable the right arrow key
          KeyStroke right = KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0);
          im.put(right, "none");
          // Override the default tab behaviour
          // Tab to the next editable cell. When no editable cells goto next cell.
          final Action oldTabAction = table.getActionMap().get(im.get(tab));
          Action tabAction = new AbstractAction() {
               public void actionPerformed(ActionEvent e) {
                    oldTabAction.actionPerformed(e);
                    JTable table = (JTable) e.getSource();
                    int rowCount = table.getRowCount();
                    int columnCount = table.getColumnCount();
                    int row = table.getSelectedRow();
                    int column = table.getSelectedColumn();
                    while (!table.isCellEditable(row, column)) {
                         column += 1;
                         if (column == columnCount) {
                              column = 0;
                              row += 1;
                         if (row == rowCount) {
                              row = 0;
                         // Back to where we started, get out.
                         if (row == table.getSelectedRow()
                                   && column == table.getSelectedColumn()) {
                              break;
                    table.changeSelection(row, column, false, false);
          table.getActionMap().put(im.get(tab), tabAction);
          table.setSurrendersFocusOnKeystroke(true);
     public static void main(String[] args) {
          test frame = new test();
          frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
          frame.pack();
          frame.setLocationRelativeTo(null);
          frame.setVisible(true);
import java.awt.Component;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import javax.swing.JTable;
import javax.swing.JTextArea;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
public class TextAreaRenderer extends JTextArea implements TableCellRenderer {
     private final DefaultTableCellRenderer adaptee = new DefaultTableCellRenderer();
     /** map from table to map of rows to map of column heights */
     private final Map cellSizes = new HashMap();
     public TextAreaRenderer() {
          setLineWrap(true);
          setWrapStyleWord(true);
     public Component getTableCellRendererComponent(//
               JTable table, Object obj, boolean isSelected, boolean hasFocus,
               int row, int column) {
          // set the colours, etc. using the standard for that platform
          adaptee.getTableCellRendererComponent(table, obj, isSelected, hasFocus,
                    row, column);
          setForeground(adaptee.getForeground());
          setBackground(adaptee.getBackground());
          setBorder(adaptee.getBorder());
          setFont(adaptee.getFont());
          setText(adaptee.getText());
          // This line was very important to get it working with JDK1.4
          TableColumnModel columnModel = table.getColumnModel();
          setSize(columnModel.getColumn(column).getWidth(), 100000);
          int height_wanted = (int) getPreferredSize().getHeight();
          addSize(table, row, column, height_wanted);
          height_wanted = findTotalMaximumRowSize(table, row);
          if (height_wanted != table.getRowHeight(row)) {
               table.setRowHeight(row, height_wanted);
          return this;
     private void addSize(JTable table, int row, int column, int height) {
          Map rows = (Map) cellSizes.get(table);
          if (rows == null) {
               cellSizes.put(table, rows = new HashMap());
          Map rowheights = (Map) rows.get(new Integer(row));
          if (rowheights == null) {
               rows.put(new Integer(row), rowheights = new HashMap());
          rowheights.put(new Integer(column), new Integer(height));
      * Look through all columns and get the renderer. If it is also a
      * TextAreaRenderer, we look at the maximum height in its hash table for
      * this row.
     private int findTotalMaximumRowSize(JTable table, int row) {
          int maximum_height = 0;
          Enumeration columns = table.getColumnModel().getColumns();
          while (columns.hasMoreElements()) {
               TableColumn tc = (TableColumn) columns.nextElement();
               TableCellRenderer cellRenderer = tc.getCellRenderer();
               if (cellRenderer instanceof TextAreaRenderer) {
                    TextAreaRenderer tar = (TextAreaRenderer) cellRenderer;
                    maximum_height = Math.max(maximum_height, tar
                              .findMaximumRowSize(table, row));
          return maximum_height;
     private int findMaximumRowSize(JTable table, int row) {
          Map rows = (Map) cellSizes.get(table);
          if (rows == null)
               return 0;
          Map rowheights = (Map) rows.get(new Integer(row));
          if (rowheights == null)
               return 0;
          int maximum_height = 0;
          for (Iterator it = rowheights.entrySet().iterator(); it.hasNext();) {
               Map.Entry entry = (Map.Entry) it.next();
               int cellHeight = ((Integer) entry.getValue()).intValue();
               maximum_height = Math.max(maximum_height, cellHeight);
          return maximum_height;
import java.awt.KeyboardFocusManager;
import java.awt.event.FocusEvent;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import java.util.HashSet;
import java.util.Set;
import javax.swing.DefaultCellEditor;
import javax.swing.JComponent;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
public class TextAreaEditor extends DefaultCellEditor {
     public TextAreaEditor() {
          super(new JTextField());
          final JTextArea textArea = new JTextArea();
          textArea.setWrapStyleWord(true);
          textArea.setLineWrap(true);
          JScrollPane scrollPane = new JScrollPane(textArea);
          scrollPane.setBorder(null);
          Set forwardTraversalKeys = new HashSet();
          forwardTraversalKeys.add(KeyStroke.getKeyStroke(KeyEvent.VK_TAB, 0));
          textArea.setFocusTraversalKeys(
                    KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS,
                    forwardTraversalKeys);
          Set backwardTraversalKeys = new HashSet();
          backwardTraversalKeys.add(KeyStroke.getKeyStroke(KeyEvent.VK_TAB,
                    InputEvent.SHIFT_MASK));
          textArea.setFocusTraversalKeys(
                    KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS,
                    backwardTraversalKeys);
          scrollPane.getVerticalScrollBar().setFocusable(false);
          scrollPane.getVerticalScrollBar().setFocusable(false);
          editorComponent = scrollPane;
          delegate = new DefaultCellEditor.EditorDelegate() {
               public void setValue(Object value) {
                    textArea.setText((value != null) ? value.toString() : "");
               public Object getCellEditorValue() {
                    return textArea.getText();
     public void lostFocus() {
          stopCellEditing();
}

Answer 1

Sorry for reposting this again...I didn't format the code in my previous post.
I am facing the following problems with JTextArea inside Jtable Cell
1. blinking cursor not visible on the cell(0,0) first time the UI is shown, although it has the focus
2. blinking cursor not visible on the 5th column (JTextArea) when it receives the focus nor the characters are visible when i start typing. i have to manually double click to force the focus to shift to the cell.
3. focus does not shit out of the 5th column (JTextArea) after pressing the tab key or enter key once. i have to do that twice to force the focus out.
Following is the code which i have implemented. Please let me know what is being missed out to rectify the above problems.
Thanks.
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.BorderFactory;
import javax.swing.DefaultCellEditor;
import javax.swing.InputMap;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
public class test extends JFrame {
     JTable table;
     public test() {
          table = new JTable(15, 5) {
               public boolean isCellEditable(int row, int column) {
                    return column % 2 == 0;
                    // return true;
               public void changeSelection(final int row, final int column,
                         boolean toggle, boolean extend) {
                    super.changeSelection(row, column, toggle, extend);
                    if (editCellAt(row, column)) {
                         getEditorComponent().requestFocusInWindow();
          table.setPreferredScrollableViewportSize(table.getPreferredSize());
          table.putClientProperty("terminateEditOnFocusLost", Boolean.TRUE);
          TextAreaRenderer textAreaRenderer = new TextAreaRenderer();
          TextAreaEditor textEditor = new TextAreaEditor();
          table.getColumnModel().getColumn(4).setCellRenderer(textAreaRenderer);
          table.getColumnModel().getColumn(4).setCellEditor(textEditor);
          JTextField tf = new JTextField();
          tf.setBorder(BorderFactory.createEmptyBorder());
          table.setDefaultEditor(Object.class, new DefaultCellEditor((tf)));
          JScrollPane scrollPane = new JScrollPane(table);
          DefaultCellEditor dce = (DefaultCellEditor) table
                    .getDefaultEditor(Object.class);
          dce.setClickCountToStart(1);
          getContentPane().add(scrollPane);
          InputMap im = table
                    .getInputMap(JTable.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
          // Have the enter key work the same as the tab key
          KeyStroke tab = KeyStroke.getKeyStroke(KeyEvent.VK_TAB, 0);
          KeyStroke enter = KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0);
          im.put(enter, im.get(tab));
          // Disable the right arrow key
          KeyStroke right = KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0);
          im.put(right, "none");
          // Override the default tab behaviour
          // Tab to the next editable cell. When no editable cells goto next cell.
          final Action oldTabAction = table.getActionMap().get(im.get(tab));
          Action tabAction = new AbstractAction() {
               public void actionPerformed(ActionEvent e) {
                    oldTabAction.actionPerformed(e);
                    JTable table = (JTable) e.getSource();
                    int rowCount = table.getRowCount();
                    int columnCount = table.getColumnCount();
                    int row = table.getSelectedRow();
                    int column = table.getSelectedColumn();
                    while (!table.isCellEditable(row, column)) {
                         column += 1;
                         if (column == columnCount) {
                              column = 0;
                              row += 1;
                         if (row == rowCount) {
                              row = 0;
                         // Back to where we started, get out.
                         if (row == table.getSelectedRow()
                                   && column == table.getSelectedColumn()) {
                              break;
                    table.changeSelection(row, column, false, false);
          table.getActionMap().put(im.get(tab), tabAction);
          table.setSurrendersFocusOnKeystroke(true);
     public static void main(String[] args) {
          test frame = new test();
          frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
          frame.pack();
          frame.setLocationRelativeTo(null);
          frame.setVisible(true);
import java.awt.Component;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import javax.swing.JTable;
import javax.swing.JTextArea;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
public class TextAreaRenderer extends JTextArea implements TableCellRenderer {
     private final DefaultTableCellRenderer adaptee = new DefaultTableCellRenderer();
     /** map from table to map of rows to map of column heights */
     private final Map cellSizes = new HashMap();
     public TextAreaRenderer() {
          setLineWrap(true);
          setWrapStyleWord(true);
     public Component getTableCellRendererComponent(//
               JTable table, Object obj, boolean isSelected, boolean hasFocus,
               int row, int column) {
          // set the colours, etc. using the standard for that platform
          adaptee.getTableCellRendererComponent(table, obj, isSelected, hasFocus,
                    row, column);
          setForeground(adaptee.getForeground());
          setBackground(adaptee.getBackground());
          setBorder(adaptee.getBorder());
          setFont(adaptee.getFont());
          setText(adaptee.getText());
          // This line was very important to get it working with JDK1.4
          TableColumnModel columnModel = table.getColumnModel();
          setSize(columnModel.getColumn(column).getWidth(), 100000);
          int height_wanted = (int) getPreferredSize().getHeight();
          addSize(table, row, column, height_wanted);
          height_wanted = findTotalMaximumRowSize(table, row);
          if (height_wanted != table.getRowHeight(row)) {
               table.setRowHeight(row, height_wanted);
          return this;
     private void addSize(JTable table, int row, int column, int height) {
          Map rows = (Map) cellSizes.get(table);
          if (rows == null) {
               cellSizes.put(table, rows = new HashMap());
          Map rowheights = (Map) rows.get(new Integer(row));
          if (rowheights == null) {
               rows.put(new Integer(row), rowheights = new HashMap());
          rowheights.put(new Integer(column), new Integer(height));
      * Look through all columns and get the renderer. If it is also a
      * TextAreaRenderer, we look at the maximum height in its hash table for
      * this row.
     private int findTotalMaximumRowSize(JTable table, int row) {
          int maximum_height = 0;
          Enumeration columns = table.getColumnModel().getColumns();
          while (columns.hasMoreElements()) {
               TableColumn tc = (TableColumn) columns.nextElement();
               TableCellRenderer cellRenderer = tc.getCellRenderer();
               if (cellRenderer instanceof TextAreaRenderer) {
                    TextAreaRenderer tar = (TextAreaRenderer) cellRenderer;
                    maximum_height = Math.max(maximum_height, tar
                              .findMaximumRowSize(table, row));
          return maximum_height;
     private int findMaximumRowSize(JTable table, int row) {
          Map rows = (Map) cellSizes.get(table);
          if (rows == null)
               return 0;
          Map rowheights = (Map) rows.get(new Integer(row));
          if (rowheights == null)
               return 0;
          int maximum_height = 0;
          for (Iterator it = rowheights.entrySet().iterator(); it.hasNext();) {
               Map.Entry entry = (Map.Entry) it.next();
               int cellHeight = ((Integer) entry.getValue()).intValue();
               maximum_height = Math.max(maximum_height, cellHeight);
          return maximum_height;
import java.awt.KeyboardFocusManager;
import java.awt.event.FocusEvent;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import java.util.HashSet;
import java.util.Set;
import javax.swing.DefaultCellEditor;
import javax.swing.JComponent;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
public class TextAreaEditor extends DefaultCellEditor {
     public TextAreaEditor() {
          super(new JTextField());
          final JTextArea textArea = new JTextArea();
          textArea.setWrapStyleWord(true);
          textArea.setLineWrap(true);
          JScrollPane scrollPane = new JScrollPane(textArea);
          scrollPane.setBorder(null);
          Set forwardTraversalKeys = new HashSet();
          forwardTraversalKeys.add(KeyStroke.getKeyStroke(KeyEvent.VK_TAB, 0));
          textArea.setFocusTraversalKeys(
                    KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS,
                    forwardTraversalKeys);
          Set backwardTraversalKeys = new HashSet();
          backwardTraversalKeys.add(KeyStroke.getKeyStroke(KeyEvent.VK_TAB,
                    InputEvent.SHIFT_MASK));
          textArea.setFocusTraversalKeys(
                    KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS,
                    backwardTraversalKeys);
          scrollPane.getVerticalScrollBar().setFocusable(false);
          scrollPane.getVerticalScrollBar().setFocusable(false);
          editorComponent = scrollPane;
          delegate = new DefaultCellEditor.EditorDelegate() {
               public void setValue(Object value) {
                    textArea.setText((value != null) ? value.toString() : "");
               public Object getCellEditorValue() {
                    return textArea.getText();
     public void lostFocus() {
          stopCellEditing();
}