From fdabca99b26aee089d81654790920a2e004950ba Mon Sep 17 00:00:00 2001
From: Karl Tauber <karl@jformdesigner.com>
Date: Fri, 7 Aug 2020 23:10:22 +0200
Subject: [PATCH] ScrollBar: fixed NPE when switching LaF while smooth
 scrolling animation is running (issue #50)

---
 .../src/main/java/com/formdev/flatlaf/ui/FlatScrollBarUI.java   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatScrollBarUI.java b/flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatScrollBarUI.java
index 732e0fa3..676abfe1 100644
--- a/flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatScrollBarUI.java
+++ b/flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatScrollBarUI.java
@@ -510,7 +510,7 @@ public class FlatScrollBarUI
 			Object interpolator = UIManager.get( "ScrollPane.smoothScrolling.interpolator" );
 
 			animator = new Animator( duration, fraction -> {
-				if( !scrollbar.isShowing() ) {
+				if( scrollbar == null || !scrollbar.isShowing() ) {
 					animator.cancel();
 					return;
 				}