BasicTableUI.java 文件源码

/**
 * Returns the row index of the last visible row.
 *
 */
int getLastVisibleRowIndex(JTable table)
{
  ComponentOrientation or = table.getComponentOrientation();
  Rectangle r = table.getVisibleRect();
  r.translate(0, (int) r.getHeight() - 1);
  if (or.isLeftToRight())
    r.translate((int) r.getWidth() - 1, 0);
  // The next if makes sure that we don't return -1 simply because
  // there is white space at the bottom of the table (ie, the display
  // area is larger than the table)
  if (table.rowAtPoint(r.getLocation()) == -1)
    {
      if (getFirstVisibleRowIndex(table) == -1)
        return -1;
      else
        return table.getModel().getRowCount() - 1;
    }
  return table.rowAtPoint(r.getLocation());
}