如何处理JOptionPane中的取消按钮 [英] How to handle cancel button in JOptionPane

问题描述

我创建了一个类型为 showInputDialog 的 JOptionPane 。当它打开时，它会显示两个按钮： OK 和取消。当我按下取消按钮时，我想处理动作，但我不知道如何触及它。我怎么能得到它？

I had created a JOptionPane of type showInputDialog. When it opens it, it shows me two buttons: OK and Cancel. I would like to handle the action when I push on Cancel button, but I don't know how to reach it. How can I get it?

推荐答案

例如：

int n = JOptionPane.showConfirmDialog(
                            frame, "Would you like green eggs and ham?",
                            "An Inane Question",
                            JOptionPane.YES_NO_OPTION);
if (n == JOptionPane.YES_OPTION) {

} else if (n == JOptionPane.NO_OPTION) {

} else {

}

或者使用 showOptionDialog ：

Object[] options = {"Yes, please", "No way!"};
int n = JOptionPane.showOptionDialog(frame,
                "Would you like green eggs and ham?",
                "A Silly Question",
                JOptionPane.YES_NO_OPTION,
                JOptionPane.QUESTION_MESSAGE,
                null,
                options,
                options[0]);
if (n == JOptionPane.YES_OPTION) {

} else if (n == JOptionPane.NO_OPTION) {

} else {

}

参见如何制作对话框以获取更多详细信息。

See How to Make Dialogs for more details.

编辑： showInputDialog

String response = JOptionPane.showInputDialog(owner, "Input:", "");
if ((response != null) && (response.length() > 0)) {

}

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