JTable column auto-maximum width

Question

Hi,
Does anyone have an idea on how to make the JTable to support column auto-maximum width resize, like we always see in a microsoft's table component, you double click on the column seperater and the column resized to its maximum size according to the content in it.
Thanks
Yutong

Answer 1

Hi again,
I wrote two methods to solve this kind of problem... take a look at them and tell me what you think about it...
   /** Adjusts the widths of a JTable columns
    * @param  table    the table
   public static void resizeTableColumns(JTable table) {
      table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);                    
      TableColumn c = null;
      FontMetrics fm = table.getFontMetrics(table.getFont());
      for (int i=0; i<table.getColumnCount(); i++) {
         c = table.getColumn(table.getColumnName(i));
         c.setPreferredWidth(determineColumnWidth(c, table.getModel(), fm));
   /** Returns the preferred width of a JTable column. The resulting width
    * is 5 pixels wider than the biggest column
    * @param  col    the column
    * @param  model  the table model
    * @param  fm     the font metrics
    public static int determineColumnWidth(TableColumn col, TableModel model,
                                          FontMetrics fm) {
      String value = (String)col.getHeaderValue();
      int headerWidth = fm.stringWidth("." + value.trim() + ".");
      int columnNumber = col.getModelIndex();
      int max = headerWidth;
      int columnWidth = 0;
      int nrows = model.getRowCount();
      String cell = "";
      for (int i=0; i<nrows; i++) {
         value = (String)model.getValueAt(i, columnNumber);
         columnWidth = fm.stringWidth("." + value.trim() + ".");
         if (columnWidth > max) max = columnWidth;
      return max + 5;