java - 等待来自 JOptionPane 等用户的消息结果

Question

我希望我的自定义消息类的行为方式与以下代码段中的 JOptionPane 相同:

int reply = JOptionPane.showConfirmDialog(
     null, 
     "Is the weather beautifull?", 
     "Question", 
     JOptionPane.YES_NO_OPTION
);
if (reply == JOptionPane.YES_OPTION) {
    // do something in response to yes...
} else {
    // do something in response to no...
}

所以我真正想要的是，我创建自己的消息对象，显示它并在用户按下伪代码时使用react，如下所示:

show my question message;
wait for user button press without blocking UI thread;
do something depending on which button the user pressed;

我尝试了所有的事情让我的消息框像 JOptionPane 一样使用 Futures、Wait/Notify 等，但我总是以阻止我的 UI 线程。

JOptionPane 这样做的秘诀是什么？ :)

Answer 1

参见 docs :

A Dialog can be modal. When a modal Dialog is visible, it blocks user input to all other windows in the program. JOptionPane creates JDialogs that are modal. To create a non-modal Dialog, you must use the JDialog class directly.

参见 modal window :

...requires users to interact with it before they can return to operating the parent application

关于实现，我猜想 swing 会阻塞 EDT 并为模态对话框创建另一个线程。