Document Listener for JTextArea in JTable

Question

I am trying to implement a DocumentListener for JTextArea in JTable, but its not happening.
Can someone tell me what's wrong. SSCCE below.
import java.awt.Component;
import java.awt.Dimension;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.Icon;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextArea;
import javax.swing.UIManager;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.text.Document;
public class MyTable_TextArea extends JTable {
     private DefaultTableModel defaultTableModel;
     private Object[][] dataArray;
     private Object[] columnNameArray;
     public final int TEXT_COLUMN = 0;     
     // column headers
     public static final String TEXT_COLUMN_HEADER = "Text";
     // text area
     TextFieldRenderer3 textFieldRenderer3;
      * constructor
      * @param variableNameArray
      * @param columnNameArray
     public MyTable_TextArea(Object[][] variableNameArray, Object[] columnNameArray) {
          this.dataArray = variableNameArray;
          this.columnNameArray = columnNameArray;
          defaultTableModel = new DefaultTableModel(variableNameArray, columnNameArray);
          this.setModel(defaultTableModel)     ;
          // text field
        textFieldRenderer3 = new TextFieldRenderer3();
          MyDocumentListener myListener = new MyDocumentListener();
          textFieldRenderer3.getDocument().addDocumentListener(myListener);
        TableColumn modelColumn = this.getColumnModel().getColumn(TEXT_COLUMN);
          modelColumn.setCellRenderer(textFieldRenderer3);
      * nested class
     class MyDocumentListener implements DocumentListener {
         String newline = "\n";
         public void insertUpdate(DocumentEvent e) {
              System.out.println ("insert update");
             updateLog(e, "inserted into");
         public void removeUpdate(DocumentEvent e) {
              System.out.println ("remove update");
             updateLog(e, "removed from");
         public void changedUpdate(DocumentEvent e) {
             //Plain text components do not fire these events
         public void updateLog(DocumentEvent e, String action) {
             Document doc = (Document)e.getDocument();
             int changeLength = e.getLength();
             textFieldRenderer3.append(
                 changeLength + " character" +
                 ((changeLength == 1) ? " " : "s ") +
                 action + doc.getProperty("name") + "." + newline +
                 "  Text length = " + doc.getLength() + newline);
      * @param args
     public static void main(String[] args) {
          try{
               UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
          catch (Exception e){
               e.printStackTrace();
         String[] columnNameArray = {
                   TEXT_COLUMN_HEADER,
                   "1",
                   "2",
          Object[][]  dataArray = {      {"", "", ""},      };
          final MyTable_TextArea panel = new MyTable_TextArea(dataArray, columnNameArray);
          final JFrame frame = new JFrame();
          frame.getContentPane().add(new JScrollPane(panel));
          frame.setTitle("My Table");
          frame.setPreferredSize(new Dimension(500, 200));
          frame.addWindowListener(new WindowAdapter(){
               @Override
               public void windowClosing(WindowEvent e) {
          frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
          frame.setLocation(300, 200);
          frame.pack();
          frame.setVisible(true);
class TextFieldRenderer3 extends JTextArea implements TableCellRenderer {
     Icon defaultIcon;
     boolean isChecked = false;
     public TextFieldRenderer3() {
          System.out.println ("TextFieldRenderer()");
          setToolTipText("Double click to type");
     @Override
     public Component getTableCellRendererComponent(JTable table,
               Object value,
               boolean isSelected,
               boolean hasFocus,
               int row,
               int column) {
          System.out.println ("TextFieldRenderer.getTableCellRendererComponent() row/column: " + row + "\t"+ column);
          return this;
}

Answer 1

I've implemented in the cell editor. I don't see how to get the value being typed (and nothing appears in the text area)
import java.awt.Component;
import java.awt.Dimension;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.EventObject;
import javax.swing.Icon;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextArea;
import javax.swing.UIManager;
import javax.swing.event.CellEditorListener;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.text.Document;
public class MyTable_TextArea extends JTable {
     private DefaultTableModel defaultTableModel;
     private Object[][] dataArray;
     private Object[] columnNameArray;
     public final int TEXT_COLUMN = 0;     
     // column headers
     public static final String TEXT_COLUMN_HEADER = "Text";
     // text area
     TextAreaEditor textAreaEditor;
      * constructor
      * @param variableNameArray
      * @param columnNameArray
     public MyTable_TextArea(Object[][] variableNameArray, Object[] columnNameArray) {
          this.dataArray = variableNameArray;
          this.columnNameArray = columnNameArray;
          defaultTableModel = new DefaultTableModel(variableNameArray, columnNameArray);
          this.setModel(defaultTableModel)     ;
          // text field
        textAreaEditor = new TextAreaEditor();
          MyDocumentListener myListener = new MyDocumentListener();
          textAreaEditor.getDocument().addDocumentListener(myListener);
        TableColumn modelColumn = this.getColumnModel().getColumn(TEXT_COLUMN);
          modelColumn.setCellEditor(textAreaEditor);
      * nested class
     class MyDocumentListener implements DocumentListener {
         String newline = "\n";
         public void insertUpdate(DocumentEvent e) {
              System.out.println ("insert update");
             updateLog(e, "inserted into");
         public void removeUpdate(DocumentEvent e) {
              System.out.println ("remove update");
             updateLog(e, "removed from");
         public void changedUpdate(DocumentEvent e) {
             //Plain text components do not fire these events
         public void updateLog(DocumentEvent e, String action) {
             Document doc = (Document)e.getDocument();
             int changeLength = e.getLength();
             textAreaEditor.append(
                 changeLength + " character" +
                 ((changeLength == 1) ? " " : "s ") +
                 action + doc.getProperty("name") + "." + newline +
                 "  Text length = " + doc.getLength() + newline);
      * @param args
     public static void main(String[] args) {
          try{
               UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
          catch (Exception e){
               e.printStackTrace();
         String[] columnNameArray = {
                   TEXT_COLUMN_HEADER,
                   "1",
                   "2",
          Object[][]  dataArray = {      {"", "", ""},      };
          final MyTable_TextArea panel = new MyTable_TextArea(dataArray, columnNameArray);
          final JFrame frame = new JFrame();
          frame.getContentPane().add(new JScrollPane(panel));
          frame.setTitle("My Table");
          frame.setPreferredSize(new Dimension(500, 200));
          frame.addWindowListener(new WindowAdapter(){
               @Override
               public void windowClosing(WindowEvent e) {
          frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
          frame.setLocation(300, 200);
          frame.pack();
          frame.setVisible(true);
class TextAreaEditor extends JTextArea implements TableCellEditor {
     Icon defaultIcon;
     boolean isChecked = false;
     public TextAreaEditor() {
          System.out.println ("TextAreaEditor()");
          setToolTipText("Double click to type");
     @Override
     public Component getTableCellEditorComponent(JTable arg0,
               Object arg1,
               boolean arg2,
               int arg3,
               int arg4) {
          System.out.println ("TextAreaEditor() arg1: " + arg1 + "arg2: " + arg2  + " arg3: " + arg3  + " arg4: " + arg4  );
          return null;
     @Override
     public void addCellEditorListener(CellEditorListener arg0) {
          System.out.println ("TextAreaEditor().addCellEditorListener");
     @Override
     public void cancelCellEditing() {
          System.out.println ("TextAreaEditor().cancelCellEditing");
     @Override
     public Object getCellEditorValue() {
          System.out.println ("TextAreaEditor().getCellEditorValue");
          return null;
     @Override
     public boolean isCellEditable(EventObject arg0) {
          System.out.println ("TextAreaEditor().isCellEditable");
          return true;
     @Override
     public void removeCellEditorListener(CellEditorListener arg0) {
          System.out.println ("TextAreaEditor().removeCellEditorListener");          
     @Override
     public boolean shouldSelectCell(EventObject arg0) {
          System.out.println ("TextAreaEditor().shouldSelectCell");
          return false;
     @Override
     public boolean stopCellEditing() {
          System.out.println ("TextAreaEditor().stopCellEditing");
          return false;
}