Determining the Opposite Component of a Focus Event
The opposite component is the other component
affected in a focus event.
Specifically, in a focus-lost event, the opposite component
is the one gaining the focus.
In a focus-gain event, the opposite component
is the one losing the focus.
Sometimes the opposite component is null, which indicates
that the component is in some other application.
component.addFocusListener(new MyFocusListener());
public class MyFocusListener extends FocusAdapter {
public void focusGained(FocusEvent evt) {
// The component that lost the focus
Component c = evt.getOppositeComponent();
}
public void focusLost(FocusEvent evt) {
// The component that gained the focus
Component c = evt.getOppositeComponent();
}
}
Post a comment