BasicComboBoxUI.FocusHandler (Java SE 9 & JDK 9 )

java.lang.Object
- javax.swing.plaf.basic.BasicComboBoxUI.FocusHandler

All Implemented Interfaces:

FocusListener, EventListener

Enclosing class:

BasicComboBoxUI
```
public class BasicComboBoxUI.FocusHandler
extends Object
implements FocusListener
```
This listener hides the popup when the focus is lost. It also repaints when focus is gained or lost. This public inner class should be treated as protected. Instantiate it only within subclasses of BasicComboBoxUI.

Constructor Summary

Constructors
Constructor Description

FocusHandler()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`focusGained(FocusEvent e)`	Invoked when a component gains the keyboard focus.
`void`	`focusLost(FocusEvent e)`	Invoked when a component loses the keyboard focus.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - FocusHandler
```
public FocusHandler()
```
- Method Detail
  - focusGained
```
public void focusGained(FocusEvent e)
```
    Description copied from interface: FocusListener
    
    Invoked when a component gains the keyboard focus.
    
    Specified by:
    
    focusGained in interface FocusListener
    
    Parameters:
    
    e - the event to be processed
  - focusLost
```
public void focusLost(FocusEvent e)
```
    Description copied from interface: FocusListener
    
    Invoked when a component loses the keyboard focus.
    
    Specified by:
    
    focusLost in interface FocusListener
    
    Parameters:
    
    e - the event to be processed