swing - Swing 中的根 Pane 和顶级容器有什么区别？

Question

我知道每个顶级容器都有一些层:

root pane
layer pane
content pane
glass pane

但我不明白根 Pane 是否是顶级容器本身。

Pane 和容器之间是什么关系？事实上，当我返回一个 Pane 时 getContentPane() ，对象的类型是 Container !

Answer 1

您还有一个 JFrame .阅读更多 How to Use Root Panes .


来自 JRootPane :

The "heavyweight" components (those that delegate to a peer, or native component on the host system) are shown with a darker, heavier box. The four heavyweight JFC/Swing containers (JFrame, JDialog, JWindow, and JApplet) are shown in relation to the AWT classes they extend. These four components are the only heavyweight containers in the Swing library.