Classes which implement this interface provide methods
that deal with the events that are generated as controls
gain and lose focus.
<p>
After creating an instance of a class that :
this interface it can be added to a control using the
<code>addFocusListener</code> method and removed using
the <code>removeFocusListener</code> method. When a
control gains or loses focus, the appropriate method
will be invoked.
</p>
Classes which implement this interface provide methods that deal with the events that are generated as controls gain and lose focus. <p> After creating an instance of a class that : this interface it can be added to a control using the <code>addFocusListener</code> method and removed using the <code>removeFocusListener</code> method. When a control gains or loses focus, the appropriate method will be invoked. </p>
@see FocusAdapter @see FocusEvent