title: Controlled editing of a row selection in JTable
body: <p>I have a JTable displaying rows from an SQL database. The table is relatively small (only 4 columns and up to 1000 rows). </p>
  
  <p>I would like to give the user the opportunity to edit any cells in the table but want to avoid restricting it so much so that they must use an edit dialog box (this makes for far easier error checking and validation but is less intuitive) </p>
  
  <p>I have tried a few different ways of controlling edit selections using the valueChanged method  of my JTable but haven't had much luck.</p>
  
  <p>I would like each row to be edited and written to the database at the conclusion of editing. I would like that once a cell has been clicked to start the editing of that row, no other rows can be selected until the user has finished editing the row (other rows are grayed out). After editing each cell and pressing enter, the edit selection should jump to the next column in the same row.</p>
  
  <p>Can anyone give pointers on how I can achieve this?</p>
  
  <pre><code>//  Create table with database data
     table = new JTable(new DefaultTableModel(data, columnNames)) {
          public Class getColumnClass(int column) {
              for (int row = 0; row &lt; getRowCount(); row++) {
                  Object o = getValueAt(row, column);
                  if (o != null){
                      return o.getClass();
                  }
              }
              return Object.class;
          }
  
          @Override
          public boolean isCellEditable(int row, int col){
              return true; 
          }
  
          @Override
          public boolean editCellAt(int row, int column) {
              boolean ans = super.editCellAt(row, column);
              if (ans) { 
                  Component editor = table.getEditorComponent();
                  editor.requestFocusInWindow();
              }
              return ans;
          }
  
          @Override
          public void valueChanged(ListSelectionEvent source) {
              super.valueChanged(source);
              if (table!=null)
                  table.changeSelection(getSelectedRow(), getSelectedColumn()+1, false, false);
          }
  
      };
  </code></pre>
  
  <p>Edit - custom cell editor with table pointer seems to be a start</p>
  
  <pre><code>public class ExchangeTableCellEditor  extends AbstractCellEditor implements TableCellEditor {
  
  private JTable table;
  
  JComponent component = new JTextField();
  
  public ExchangeTableCellEditor(JTable table) {
      this.table = table;
  }
  
  public boolean stopCellEditing() {
      boolean ans = super.stopCellEditing();
      //now we want to increment the cell count
      table.editCellAt(table.getSelectedRow(), table.getSelectedColumn()+1);
      return ans;
  }
  
  @Override
  public void cancelCellEditing() {
      //do nothing... must accept cell changes 
  }
  
  @Override
  public Object getCellEditorValue() {
      return ((JTextField)component).getText();
  }
  
  @Override
  public Component getTableCellEditorComponent(JTable arg0, Object value,
          boolean arg2, int arg3, int arg4) {
      ((JTextField)component).setText((String)value);
      return component;
  }
  </code></pre>
  
  <p>}</p>