swing类中表的有关问题

             public static JTable typetb = new JTable();             public static DefaultTableModel typeb = new DefaultTableModel();             public 构造方法()             {             Type bean=new Type();         TypeDAO tdao=new TypeDAO();         List<Type> tlist=(List<Type>)tdao.selectType(bean);//这些你懂的         String[] header = {"序号", "序号","名称","备注"};         Object[][] data = new Object[tlist.size()][header.length];           for (int i =0; i < tlist.size(); i++) {               Type tbean = (Type) tlist.get(i);               data[i][0]=tbean.getTid();               data[i][1]=i+1;               data[i][2]=tbean.getTname();                 data[i][3]=tbean.getTmatter();          }       typeb.setDataVector(data, header);           hideColumn(typetb, 0);           typetb.getTableHeader().setPreferredSize(new Dimension(1,25));         typetb.getColumnModel().getColumn(1).setPreferredWidth(60);       typetb.getColumnModel().getColumn(2).setPreferredWidth(100);        typetb.getColumnModel().getColumn(3).setPreferredWidth(200); //这只列的宽度       typetb.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);//设置可以移动宽度       }      public static void hideColumn(JTable table, int index) {        TableColumn tc = table.getColumnModel().getColumn(index);        tc.setMaxWidth(0);        tc.setPreferredWidth(0);        tc.setWidth(0);        tc.setMinWidth(0);        table.getTableHeader().getColumnModel().getColumn(index).setMaxWidth(0);        table.getTableHeader().getColumnModel().getColumn(index).setMinWidth(0);     }