JFrame 和 JDialog 有什么区别？
JFrame 和 JDialog 之间有什么区别？
为什么我们不能对 JDialog 使用 setDefaultCloseOperation(JDialog.EXIT_ON_CLOSE); ？
What is the difference between a JFrame and a JDialog?
Why can't we use setDefaultCloseOperation(JDialog.EXIT_ON_CLOSE); for a JDialog?
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JFrame是一个普通窗口，带有普通按钮（可选）和装饰。另一侧的JDialog没有最大化和最小化按钮，通常使用JOptionPane静态方法创建，并且更适合使它们成为模式（它们会阻止其他组件，直到他们已关闭）。但两者都继承自 Window，因此它们共享许多功能。
JFrameis a normal window with its normal buttons (optionally) and decorations.JDialogon the other side does not have a maximize and minimize buttons and usually are created withJOptionPanestatic methods, and are better fit to make them modal (they block other components until they are closed).But both inherit from Window, so they share much functionality.
当然可以。
发布您的 SSCCE 来演示您在使用此值时遇到的问题。
但是，您不能将
EXIT_ON_CLOSE用于JDialog，因为不支持该值，这是有道理的，因为JDialog是“子”或“应用程序的“helper”窗口，由JFrame表示。关闭对话框不应关闭应用程序。Sure you can.
Post your SSCCE that demonstrates the problem you are having when using this value.
However you can't use
EXIT_ON_CLOSEfor aJDialogbecause that value is not supported which makes sense since aJDialogis a "child" or "helper" window for your application which is represented by aJFrame. Closing a dialog should not close the application.有一些带有
owner参数的JDialog构造函数，该参数可以是Frame、Dialog或窗口。非空值还使JDialog保持在其所有者上方。这是对 Fortran 描述的模态行为的补充。There are some
JDialogconstructors with aownerparameter which can be aFrame, aDialogor aWindow. A non-null value also makes theJDialogstay above his owner. This is complementary of the modal behavior described by Fortran.您还可以使用 setModal(boolean t);
这只适用于
JDialog。用户必须在JDialog上操作，而不是在其他窗口上操作。如果他们想要操作所有者窗口，则必须关闭此JDialog。You can also use
setModal(boolean t);This only works on
JDialog. User must operate onJDialognot other window. If they wanna operate owner windows, they must shut down thisJDialog.