FULL PRODUCT VERSION :
C:\Program Files\Java\jre1.5.0_06\bin>.\java -version
java version "1.5.0_06"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-b05)
Java HotSpot(TM) Client VM (build 1.5.0_06-b05, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP
Service Pack 2

A DESCRIPTION OF THE PROBLEM :
When using the Box class for a table cell renderer, you cannot set the background color.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the code provided and select different rows in the table.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
When selecting a row the entire row (both columns) should use the table selection color
ACTUAL -
The cells render with a Box are not rendered in the table selection color

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.awt.Component;

import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableCellRenderer;

public class BoxSelector extends JFrame
{
{
setDefaultCloseOperation(EXIT_ON_CLOSE);
TableModel tableModel = new TableModel();
Table table = new Table(tableModel);
JScrollPane scrollPane = new JScrollPane(table);
getContentPane().add(scrollPane);
setBounds(200, 200, 200, 200);
setVisible(true);
}

public static void main(String[] args)
{
new BoxSelector();
}

class Table extends JTable
{

public Table(TableModel tableModel)
{
super(tableModel);
columnModel.getColumn(0).setCellRenderer(new BoxRenderer());
columnModel.getColumn(1).setCellRenderer(new PanelRenderer());

}
class BoxRenderer implements TableCellRenderer
{
Box box = new Box(BoxLayout.X_AXIS);

public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
{
if (isSelected)
box.setBackground(Table.this.getSelectionBackground());
else
box.setBackground(Table.this.getBackground());

return box;
}
}

class PanelRenderer implements TableCellRenderer
{
JPanel panel = new JPanel();

public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
{
if (isSelected)
panel.setBackground(Table.this.getSelectionBackground());
else
panel.setBackground(Table.this.getBackground());

return panel;
}
}
}

class TableModel extends AbstractTableModel
{

public int getColumnCount()
{
return 2;
}

public int getRowCount()
{
// TODO Auto-generated method stub
return 2;
}

public Object getValueAt(int rowIndex, int columnIndex)
{
return null;
}

public String getColumnName(int index)
{
switch (index)
{
case 0: return "Box";
case 1: return "JPanel";
default: return null;
}
}
}
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Use the JPanel instead of Box