Sort JTable

Question

I have a JTable with data in it.
The table has 5 columns.
The first column is a column with numbers and I want that if the header of column 1 is clicked it sorts the table.
I found a lot of things about sorting a table but I don't exactly understand them.
Can someone tell me how it works??

Answer 1

    // table model for listing selected genes.
    selectTM = new AbstractTableModel( ){
      public int getColumnCount( )
          { return 2;}
      public int getRowCount( )
          { return selected.size(); }
      public Object getValueAt( int r, int c )
          { return c == 0 ? selected.get( r ).id() : selected.get( r ).type(); }
      public String getColumnName( int c )
          { return c == 0 ? "Gene Id" : "Annotation"; }
      public boolean isCellEditable( int r, int c )
          { return false; }
    // table for listing selected genes.
    final JTable table = new JTable( selectTM );
    table.setAutoResizeMode( JTable.AUTO_RESIZE_OFF );
    // sorting based on column header clicked.
    final JTableHeader header = table.getTableHeader();
    header.setReorderingAllowed( false );
    header.addMouseListener( new MouseAdapter( ){
      public void mousePressed( MouseEvent me )
        int col = header.columnAtPoint( me.getPoint( ) );
        if( col >= 0 ){
          if( col == 0 )
            selected.sortById();
          else
            selected.sortByType();
          selectTM.fireTableDataChanged();
    } );