ComponentListener (Java SE 12 & JDK 12 )

All Superinterfaces:

EventListener

All Known Implementing Classes:

AWTEventMulticaster, BasicInternalFrameUI.ComponentHandler, BasicSliderUI.ComponentHandler, BasicTreeUI.ComponentHandler, Component.AccessibleAWTComponent.AccessibleAWTComponentHandler, ComponentAdapter, JViewport.ViewListener
```
public interface ComponentListener
extends EventListener
```
The listener interface for receiving component events. The class that is interested in processing a component event either implements this interface (and all the methods it contains) or extends the abstract ComponentAdapter class (overriding only the methods of interest). The listener object created from that class is then registered with a component using the component's addComponentListener method. When the component's size, location, or visibility changes, the relevant method in the listener object is invoked, and the ComponentEvent is passed to it.
Component events are provided for notification purposes ONLY; The AWT will automatically handle component moves and resizes internally so that GUI layout works properly regardless of whether a program registers a ComponentListener or not.

Since:

1.1

See Also:

ComponentAdapter, ComponentEvent, Tutorial: Writing a Component Listener

Method Summary

Modifier and Type	Method	Description
`void`	`componentHidden(ComponentEvent e)`	Invoked when the component has been made invisible.
`void`	`componentMoved(ComponentEvent e)`	Invoked when the component's position changes.
`void`	`componentResized(ComponentEvent e)`	Invoked when the component's size changes.
`void`	`componentShown(ComponentEvent e)`	Invoked when the component has been made visible.

- Method Detail
  - componentResized
```
void componentResized(ComponentEvent e)
```
    Invoked when the component's size changes.
    
    Parameters:
    
    e - the event to be processed
  - componentMoved
```
void componentMoved(ComponentEvent e)
```
    Invoked when the component's position changes.
    
    Parameters:
    
    e - the event to be processed
  - componentShown
```
void componentShown(ComponentEvent e)
```
    Invoked when the component has been made visible.
    
    Parameters:
    
    e - the event to be processed
  - componentHidden
```
void componentHidden(ComponentEvent e)
```
    Invoked when the component has been made invisible.
    
    Parameters:
    
    e - the event to be processed