JOptionPane是或否窗口 [英] JOptionPane Yes or No window

问题描述

我正在尝试使用是或否按钮创建消息。然后会出现一个窗口，其中包含某条消息，该消息取决于用户是否单击是或否。

I am trying to create a message with a Yes or No button. Then a window will appear with a certain message that depends on if the user clicked Yes or No.

这是我的代码：

public class test{
    public static void main(String[] args){

        //default icon, custom title
        int n = JOptionPane.showConfirmDialog(
            null,
            "Would you like green eggs and ham?",
            "An Inane Question",
            JOptionPane.YES_NO_OPTION);

        if(true){
            JOptionPane.showMessageDialog(null, "HELLO");
        }
        else {
            JOptionPane.showMessageDialog(null, "GOODBYE");
        }

        System.exit(0);
    }
}

现在无论是否按是打印HELLO或者。当用户选择否时如何让它显示GOODBYE？

Right now it prints HELLO whether or not you press Yes or No. How do I get it to show GOODBYE when the user chooses No?

推荐答案

if（true）将永远是真的，它永远不会成为别的。如果你想让它正常工作，你必须这样做：

"if(true)" will always be true and it will never make it to the else. If you want it to work correctly you have to do this:

    int reply = JOptionPane.showConfirmDialog(null, message, title, JOptionPane.YES_NO_OPTION);
        if (reply == JOptionPane.YES_OPTION) {
          JOptionPane.showMessageDialog(null, "HELLO");
        }
        else {
           JOptionPane.showMessageDialog(null, "GOODBYE");
           System.exit(0);
        }

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