public static void setKeyboardFocus(final Actor actor) {
        if (actor != null && actor.getStage() != null) {
            actor.getStage().setKeyboardFocus(actor);
        }
    }
public static void setKeyboardFocus ( final Actor actor ) { if ( actor != null && actor . getStage ( ) != null ) { actor . getStage ( ) . setKeyboardFocus ( actor ) ; } }
Null-safe method for setting keyboard focus.

@param actor if is not null and has a stage, will be set as stage's keyboard focused actor.