使此确认对话框在java中工作

因此，我试图在程序中设置一个确认对话框，询问用户是否希望使用import javax.swing.JOptionPane升级其成员资格

然而，当我开始执行时，程序总是恢复到我单击“是”时的状态。请帮忙

int option =
                     JOptionPane.showConfirmDialog(null,
                             "Would you like to become a member for $4.95?",
                             "Upgrade Membership",
                             JOptionPane.YES_NO_CANCEL_OPTION);
             if (answer == JOptionPane.YES_OPTION)
             {
                 JOptionPane.showMessageDialog(null, "Thank you. Your membership fee will be"
                         + " added to your receipt.");
                         dFee = 4.95;
                         sMember = "Premium";
             }
             if (answer == JOptionPane.NO_OPTION)
             {
                 JOptionPane.showMessageDialog(null, "Thank you for your consideration.");
                 sMember = "Regular";
             }
             if (answer == JOptionPane.CANCEL_OPTION)
             {
                 JOptionPane.showMessageDialog(null, "You may purchase a membership in the"
                         + " future.");
                 sMember = "Regular";
             }

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提供的代码片段最明显的问题可能是，答案使用了两个不同的变量

选项

是实际接收用户响应的变量，而

应答

是在别处定义的，从未分配给，而是在

if

语句中使用

---

简而言之，在

if

语句中使用

选项

而不是

答案

。

嘘，这么多人投了反对票，让我在这里休息一下。不管怎样，谢谢，这很有效。