我想要多個價格和數量,所以我可以得到總數,並將它放在表格中。你可以幫我嗎?因爲我已經搜索其他參考,並添加public Object getValueAt(int row, int column) {}
但我得到的錯誤,所以我刪除它-_-JTable中的乘法值
try {
String trans_id = txtNo.getText();
String menu_id = txtMID.getText();
String quantity = txtQuan.getText();
String menu_price = "";
Statement stmt;
stmt = con.createStatement();
ResultSet rs = stmt.executeQuery("SELECT * FROM menu");
stmt.executeUpdate("insert into transaction (trans_id, menu_id, menu_price, quantity)"
+ "values ('" + trans_id + "','" + menu_id + "','" + menu_price + "','" + quantity + "')");
DefaultTableModel model = (DefaultTableModel) tblMenu.getModel();
if (rs.next()) {
txtNo.setText("" + rs.getString("trans_id"));
txtMID.setText("" + rs.getString("menu_id"));
menu_price = rs.getString("menu_price");
txtQuan.setText("" + rs.getString("quantity"));
model.addRow(new Object[]{trans_id, menu_id, menu_price, quantity});
}
} catch (Exception e) {
System.out.println("Failed" + e);
}
真的需要你的幫助。
什麼是'txtNo','txtMID'和'txtQuan' – Blip
'txtNo' =賬單號,'txtMID' =菜單id,'txtQuan' =數量/金額 – enjeru
我沒有問你這些類代表什麼程序,但你有什麼類型的方法'setText'所有的 – Blip