java - 关闭 JFrame 时如何在后台运行应用程序？

Question

我在我的 java 应用程序中使用了一个系统托盘。我想消失 GUI 并在后台 运行应用程序，但是当用户单击 JFrame 的关闭 按钮时系统托盘必须保持可用。

Answer 1

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.

• 设置正确JFrames method for DefaultCloseOperation , JFrame.setDefaultCloseOperation(HIDE_ON_CLOSE), 默认在API中实现

设置当用户在此框架上启动“关闭”时默认发生的操作。您必须指定以下选项之一:

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

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

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

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)，此事件可从

  访问

  1. TrayIcon

  2. JPopupMenu added to SystemTray