FULL PRODUCT VERSION :
java version "1.6.0-ea"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.6.0-ea-b29)
Java HotSpot(TM) Client VM (build 1.6.0-ea-b29, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP [Version 5.1.2600]

A DESCRIPTION OF THE PROBLEM :
NullPointerException was thrown, but not listed as a possible scenario

REGRESSION. Last worked in version mustang

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Call table.getDefaultEditor(row,column)

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
per javadoc:
Returns an appropriate editor for the cell specified by row and column. If the TableColumn for this column has a non-null editor, returns that. If not, finds the class of the data in this column (using getColumnClass) and returns the default editor for this type of data.
ACTUAL -
NullPointerException

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Exception in thread "main" java.lang.NullPointerException
        at javax.swing.JTable.getDefaultEditor(JTable.java:1089)
        at javax.swing.JTable.getCellEditor(JTable.java:4375)
        at JTableBugTest2$MyTable.resize(JTableBugTest2.java:63)
        at JTableBugTest2$MyTable.resizeAll(JTableBugTest2.java:52)
        at JTableBugTest2$MyTable.tableChanged(JTableBugTest2.java:44)
        at javax.swing.JTable.setModel(JTable.java:2833)
        at javax.swing.JTable.<init>(JTable.java:408)
        at javax.swing.JTable.<init>(JTable.java:349)
        at JTableBugTest2$MyTable.<init>(JTableBugTest2.java:35)
        at JTableBugTest2.<init>(JTableBugTest2.java:25)
        at JTableBugTest2.main(JTableBugTest2.java:11)

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javax.swing.table.*;
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;

public class JTableBugTest2
extends JFrame
{
  public static void main(String[] args)
  {
    JTableBugTest2 tst = new JTableBugTest2();
    tst.setSize(100, 100);
    tst.setVisible(true);
  }

  public JTableBugTest2()
  {
    super("Bug Test");
    DefaultTableModel myModel = new DefaultTableModel();
    myModel.addColumn("Col1");
    myModel.addColumn("Col2");
    myModel.addColumn("Col3");
    myModel.addRow(new Object[]{"item1.1", "item1.2", "item1.3"});
    myModel.addRow(new Object[]{"item2.1", "item2.2", "item2.3"});
    MyTable tbl = new MyTable(myModel);
    this.getContentPane().add(tbl);
  }

  class MyTable
  extends JTable
  implements TableModelListener
  {
    public MyTable(TableModel model)
    {
      super(model);
    }

    public void tableChanged(TableModelEvent event)
    {
      super.tableChanged(event);

      int column = event.getColumn();
      if(column == TableModelEvent.ALL_COLUMNS)
        resizeAll();
      else
        resize(column);
    }

    protected void resizeAll()
    {
      for(int i=0; i<getModel().getColumnCount(); i++)
        resize(i);
    }

    protected void resize(int column)
    {
      TableCellEditor editor = null;
      TableCellRenderer renderer = null;
      Component comp;
      int width=0;
      for(int row=0; row<getModel().getRowCount(); row++)
      {
        editor = this.getCellEditor(row, column);
        if(editor != null)
        {
          comp = editor.getTableCellEditorComponent(
            this, // table
            getModel().getValueAt(row,column), // value
            false, // isSelected
            row, // row
            column // column
          );
          if(comp != null)
            width = Math.max(width, comp.getPreferredSize().width);
      }


      renderer = this.getCellRenderer(row, column);
      if(renderer != null)
      {
        comp = renderer.getTableCellRendererComponent(
          this, // table
          getModel().getValueAt(row,column), // value
          false, // isSelected
          false, // hasFocus
          row, // row
          column // column
        );
        if(comp != null)
          width = Math.max(width, comp.getPreferredSize().width);
      }
    }

    getColumnModel().getColumn(column).setPreferredWidth(width);

    this.revalidate();
    this.repaint();
    }
  }
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
don't use table.getDefaultEditor
###@###.### 2005-04-19 06:40:22 GMT