Basic learning of Java GUI

Learning from Java Swing:

Focus on understanding Container classes (Container) and component Classes (Component):

• Java the object created by the subclass or indirect subclass of the component class is called a component
• Java the object created by the subclass or indirect subclass of container is called a container
• You can add components to a container
• The container calls the RemoveAll method to remove all the components in the container
• The container itself is also a component
• Whenever a container adds a new component or removes a component, you should let the container call the Validate method

Window:

The underlying container has JFrame and JDialog

Basic learning of Java GUI