package test.gui;
  
import org.apache.log4j.Category;  
import org.apache.log4j.BasicConfigurator;
                               
import javax.swing.*; 
import javax.swing.table.*; 
public class ScrollTable 
{ 
  static public Category sLog = null;
  
  public static void main(String[] args) 
  { 
    sLog = Category.getInstance (ScrollTable.class);
    BasicConfigurator.configure ();
    
    TableModel dataModel =   new TableModel ();    
    
    JTable table = new JTable(dataModel);  
    JScrollPane scrollpane = 
          new JScrollPane(table); 
    scrollpane.setHorizontalScrollBarPolicy (
          JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED ); 
    scrollpane.setVerticalScrollBarPolicy (
          JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED );
              
    table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); 
    JFrame frame = new JFrame(); 
    frame.getContentPane ().add (scrollpane);
    frame.setDefaultCloseOperation (frame.EXIT_ON_CLOSE);
    frame.pack ();    
    frame.setSize( 300, 100); 
    frame.setVisible(true);     
  } 
 
  
  static class TableModel
    extends AbstractTableModel
  {
     int offSet = 0; 
                    
    TableModel() 
    {          
      Thread t = new Thread ( 
        new Runnable ()
        {
          int i = getOffSet();
          long startTime = System.currentTimeMillis ();
          public static final long WAIT_TIME = 100;
          public void run ()
          {
            long runTime;
            do            
            {
              runTime = System.currentTimeMillis () - startTime;
              sLog.info (" i = " + i 
                + " ( RunTime / ExpectedRunTime = " + runTime + " / " + (i*WAIT_TIME) + " )");
              try 
              {
               Thread.sleep (WAIT_TIME);
              } catch (Exception ex) 
              {
              }
              setOffSet(i++);
            } while (true);
          }
        }
                    );
        t.start();                              
    }    
    
    public int getColumnCount() 
    { 
     return 10000; 
    }  
    
    public int getRowCount() 
    { 
      return 1000;
    } 
    
    public Object getValueAt(int row, int col) 
    { 
      sLog.info ("getValueAt (row " + row + ", col "+ col + ") ");
      return new Integer(row*col+offSet); 
    }  
    
    public int setOffSet(int newOffSet) 
    { 
      offSet = newOffSet;
      fireTableDataChanged ();
      return offSet;
    }
   
    public int getOffSet() 
    { return offSet; }    
  }   // End of inner class     
}