JTable with custom column model and model table does not display the table header

Hello

I create a JTable with a custom table model and a custom column template. However the table header is not displayed (Yes, it's in a get). I have narrowed the problem down in one compilable example:

Thanks for your help.
import javax.swing.*;
import javax.swing.table.*;

public class Test1 extends JFrame
{
     public static void main(String args[])
     {
          JTable table;
          TableColumnModel colModel=createTestColumnModel();
          TestTableModel tableModel=new TestTableModel();
          Test1 frame=new Test1();

          table=new JTable(tableModel, colModel);
          frame.getContentPane().add(new JScrollPane(table));

          frame.setSize(200,200);
          frame.setVisible(true);
     }

     private static DefaultTableColumnModel createTestColumnModel()
     {
          DefaultTableColumnModel columnModel=new DefaultTableColumnModel();
          columnModel.addColumn(new TableColumn(0));

          return columnModel;
     }

     static class TestTableModel extends AbstractTableModel
     {
          public int getColumnCount()
          {
               return 1;
          }

          public Class<?> getColumnClass(int columnIndex)
          {
               return String.class;
          }

          public String getColumnName(int column)
          {
               return "col";
          }

          public int getRowCount()
          {
               return 1;
          }

          public Object getValueAt(int row, int col)
          {
               return "test";
          }

          public void setValueAt(Object aValue, int rowIndex, int columnIndex)
          {
          }
     }
}
Published by: 802416 on October 14, 2010 04:29
added
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       

See http://download.oracle.com/javase/6/docs/api/javax/swing/table/TableColumn.html#setHeaderValue (java.lang.Object)
When the TableColumn is created, the default headerValue is null
So the header ends up rendered empty label (probably of size 0 if the JTable calculates its size of header based on the size of the default rendering tool).

It worked:

     private static DefaultTableColumnModel createTestColumnModel()
     {
          DefaultTableColumnModel columnModel=new DefaultTableColumnModel();
                TableColumn col = new TableColumn(0);
                col.setHeaderValue("Header Title");
          columnModel.addColumn(col);
                return columnModel;
     }

Published by: jduprez on October 14, 2010 14:09
Beaten by a fraction of a second!

Published by: jduprez on October 14, 2010 14:10
OK, by a split of 17 minutes, specifically: o)

Tags: Java

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