Container control JPanel use __ to a cup of Java

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Project Name: Testui

Package Name: Com.siwuxie095.ui

Class Name: Testpanel.java

The catalogue of engineering structure is as follows:

After the default form JFrame is created, it contains a ContentPane

In Source, the definition of ContentPane is a JPanel type

Javax.swing.JPanel class is inherited from Javax.swing.JComponent class

And the Javax.swing.JComponent class inherits from the Java.awt.Container class

Container is a container, that is, JPanel is also a container

(JComponent nature is also a container)

A container can contain other containers, or a single control (component)

In general, a JPanel class is often used to host other controls, and its main role

is to provide space for other controls as support, and to set their background color in properties

For each jpanel there is a layout option Layout, the root panel

The ContentPane layout defaults to Java.awt.BorderLayout

In addition to JPanel, in the design of the Container also contains other containers,

Their functions are similar to those of JPanel, but they provide different characteristics respectively.

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