JDialog取消按钮
如何在 Swing JDialog 中设置取消按钮，即如果用户按下键盘上的取消"键，其动作将自动执行的按钮?
How can I set a cancel button in a Swing JDialog, i.e. a button whose action is performed automatically if the user presses the "Cancel" key on the keyboard?
通过对话框根窗格的 setDefaultButton 方法为默认操作提供对应项.
The counterpart is offered for a default action via the setDefaultButton method of the dialog's root pane.
如果这有帮助，我正在寻找类似于 WinForms Form.CancelButton 属性的内容.
If that's helping, I'm searching for an analogue to the WinForms Form.CancelButton property.
如果不扩展 JDialog，我认为这是不可能的.
I don't think this is possible with JDialog without extending it.
您可以使用 JOptionPane.showOptionDialog()(或可能是其他显示方法之一)，传递您想要使用的 JButton.
You could use JOptionPane.showOptionDialog() (or possibly one of the other show methods), passing the JButtons you want to be used.
如果传递的选项是组件，它们将正常呈现，因此您可以执行以下操作:
If the options passed are components, they'll be rendered as normal, so you can do something like this:
int optionType = JOptionPane.DEFAULT_OPTION;
int messageType = JOptionPane.PLAIN_MESSAGE; // no standard icon
JButton ok = new JButton("ok");
JButton cancel = new JButton("cancel");
//add any handlers to the buttons
...
//construct options
Object[] selValues = { ok, cancel };
//show dialog as normal, selected index will be returned.
int res = JOptionPane.showOptionDialog(null, "message",
"title", optionType, messageType, null, selValues,
selValues[0]);