public   class  DataTableModel  extends  AbstractTableModel{
     private  ArrayList ColumnName =  new  ArrayList();
     private  ArrayList data =  new  ArrayList();
     private  ArrayList ColumnType =  new  ArrayList();

     private   boolean  editable;
    /**
     * Creates a new instance of DataTableModel
     */
     public  DataTableModel( boolean  editable) {
         this .editable = editable;
    }
     public   int  getRowCount(){
         synchronized  (data){
             return  data.size();
        }
    }
     public   int  getColumnCount(){
         return  ColumnName.size();
    }
     public   Class  getColumntClass( int  col){
         return  ( Class )ColumnType.get(col);
    }
     public  String getColumnNames( int  col){
         return  (String)ColumnName.get(col);
    }
     public  Object getValueAt( int  row,  int  col){
         synchronized  (data){
             return  ((ArrayList)data.get(row)).get(col);
        }
    }
     public   void  setValueAt(Object value,  int  row,  int  col){
        synchronized  (data){
          ((ArrayList)data.get(row)).set(col,value); 
       }
    }
     public   boolean  isEditable( int  row,  int  col){
         return  editable;
    }
     public   boolean  isCellEditable( int  row,  int  col){
         return  editable;
    }
     public   void  setDataSource(ResultSet rs, String[] colName) throws  Exception{
        data.clear();
        ColumnName.clear();
        ColumnType.clear();
         if (rs== null )
          return ;
        ResultSetMetaData rsmd = rs.getMetaData();
         int  columnCount = rsmd.getColumnCount();
         for ( int  i = 0 ;i<columnCount;i++){
            ColumnName.add(colName[i]);
             Class  type =  Class .forName(rsmd.getColumnClassName(i+ 1 ));
            ColumnType.add(type);
        }
        fireTableDataChanged();
         while (rs.next()){
            ArrayList row =  new  ArrayList();
             for  ( int  i= 0 ; i<columnCount;i++)
                 if (ColumnType.get(i)==(java.lang.String. class ))
                    row.add(rs.getString(i+ 1 ));
                 else  row.add(rs.getObject(i+ 1 ));
             synchronized  (data){
                data.add(row);
                fireTableRowsInserted(data.size()- 1 ,data.size()- 1 );
            }
        }
        
    }
     public   void  insert(Object value)  throws  Exception{
         synchronized  (data){
            data.add(value);
            fireTableRowsInserted(getRowCount()- 1 ,getRowCount()- 1 );
        }
    }
     public   void  delete( int  row){
        
            data.remove(row);
            fireTableRowsDeleted(row,row);
       
    }

  
}