java - JOptionPane 数组元素

Question

这几天我在学习java的同时一直在努力解决这个问题。我一直在自学如何使用选项 Pane 来显示消息，并且最近尝试使用这些按钮，但是当我尝试传递数组元素时，我没有运气进一步了解代码。这是到目前为止我的代码；我已经成功创建了 JOptionPane 并告诉它按下按钮时要做什么，但当我运行代码时，它什么也不做。谁能帮我吗？

import javax.swing.JFrame;
import javax.swing.JOptionPane;

public class Tinker01
{

    public static void main(String[] args)
    {
        AdultTicket adultTicket = new AdultTicket();
        ChildTicket childTicket = new ChildTicket();
        OverFiftyTicket overFiftyTicket = new OverFiftyTicket();
        JFrame frame = new JFrame();

        String[] options =
            {"Adult Ticket" , "Childs Ticket" , "Over Fifty Ticket" };
        JOptionPane.showOptionDialog(frame, "What ticket would you like to buy? " + " ", " ",
            JOptionPane.YES_NO_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE, null, options, options[2]);

        if (options.equals(options[0]))
        {
            JOptionPane.showMessageDialog(frame, "Your ticket price is £" + adultTicket.getAdultTicket());
        }
        else if (options.equals(options[1]))
        {
            JOptionPane.showMessageDialog(frame, "Your ticket price is £" + childTicket.getChildTicket());
        }
        else if (options.equals(options[2]))
        {
            JOptionPane.showMessageDialog(frame, "Your ticket price is £" + overFiftyTicket.getOverFiftyTicket());
        }
      }
}

Answer 1

花点时间看一下How to Make Dialogs 。您正在等待输入，这就是您想要检查的内容，因此您应该使用 showInputDialogs 之一。请参阅Getting the User's Input from a Dialog ，您将看到您可以将 String[] 传递给静态方法，它将呈现为选项组合框，并且还返回您可以检查的确切字符串。类似的东西

import javax.swing.JOptionPane;

public class InputPaneDemo {

    public static void main(String[] args) {
        String[] possibilities = {"Adult Ticket" , "Childs Ticket" , "Over Fifty Ticket" };
        String s = (String)JOptionPane.showInputDialog(
                            null,
                            "What ticket would you like to buy?",
                            "Ticket Dialog",
                            JOptionPane.PLAIN_MESSAGE,
                            null,
                            possibilities,
                            possibilities[0]);
        switch(s) {
            case "Adult Ticket" : System.out.println("Buy Adult"); break;
            case  "Childs Ticket"  : System.out.println("Child Adult"); break;
            case "Over Fifty Ticket" : System.out.println("Over Fifty Adult"); break;
        }
    }
}

从上下文来看，这似乎是更合适的方法，因为选项对话框更适合是/否类型输入。