column.setCellRenderer(new MonthRenderer());
column = budgetTable.getColumnModel().getColumn(1);
column.setPreferredWidth(60);
column.setMinWidth(60);
column.setCellRenderer(new YearRenderer());
column = budgetTable.getColumnModel().getColumn(2);
column.setPreferredWidth(80);
column.setMinWidth(80);
column.setCellRenderer(new CurrencyRenderer());