关闭JFrame时如何在后台运行应用程序?

我想消失GUI并在后台运行该应用程序，但是 当用户单击关闭"按钮时，系统托盘必须保持可用状态 JFrame.

I want to disappear the GUI and run the application in background, but system tray must remain available when user click on close button of JFrame.

• 设置适当的 JFrames DefaultCloseOperation ，JFrame.setDefaultCloseOperation(HIDE_ON_CLOSE)的方法，默认情况下在API中实现
• set proper JFrames method for DefaultCloseOperation, JFrame.setDefaultCloseOperation(HIDE_ON_CLOSE), by default implemented in API

设置当用户在此框架上启动关闭"时默认情况下将发生的操作.您必须指定以下选项之一:

Sets the operation that will happen by default when the user initiates a "close" on this frame. You must specify one of the following choices:

DO_NOTHING_ON_CLOSE(在WindowConstants中定义):什么也不要做；要求程序处理 注册的WindowListener对象的windowClosing方法.

DO_NOTHING_ON_CLOSE (defined in WindowConstants): Don't do anything; require the program to handle the operation in the windowClosing method of a registered WindowListener object.

HIDE_ON_CLOSE(在WindowConstants中定义):调用任何已注册的WindowListener对象后，自动隐藏框架.

HIDE_ON_CLOSE (defined in WindowConstants): Automatically hide the frame after invoking any registered WindowListener objects.

DISPOSE_ON_CLOSE(在WindowConstants中定义):调用任何已注册的WindowListener后自动隐藏和处置框架 对象.

DISPOSE_ON_CLOSE (defined in WindowConstants): Automatically hide and dispose the frame after invoking any registered WindowListener objects.

EXIT_ON_CLOSE(在JFrame中定义):使用系统退出方法退出应用程序.仅在应用程序中使用它.

EXIT_ON_CLOSE (defined in JFrame): Exit the application using the System exit method. Use this only in applications.

默认情况下，该值设置为HIDE_ON_CLOSE.价值的变化 此属性导致触发属性更改事件，具有 属性名称"defaultCloseOperation".

The value is set to HIDE_ON_CLOSE by default. Changes to the value of this property cause the firing of a property change event, with property name "defaultCloseOperation".

• 然后从 SystemTray 调用JFrame.setVisible(true)，此事件可通过

  • then from SystemTray to call JFrame.setVisible(true), this event is accesible from

    1. TrayIcon

    JPopupMenu added to SystemTray