From 0ab16dbbdccca171ddb03eed96fb011192659e79 Mon Sep 17 00:00:00 2001
From: Kevin Lamonte <kevin.lamonte@gmail.com>
Date: Tue, 21 Mar 2017 15:21:46 -0400
Subject: [PATCH] Fix NPE

---
 src/jexer/io/SwingScreen.java | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/jexer/io/SwingScreen.java b/src/jexer/io/SwingScreen.java
index 8da762af..a70c8824 100644
--- a/src/jexer/io/SwingScreen.java
+++ b/src/jexer/io/SwingScreen.java
@@ -325,10 +325,12 @@ public final class SwingScreen extends Screen {
                 cursorStyle = CursorStyle.BLOCK;
             }
 
-            if (System.getProperty("jexer.Swing.tripleBuffer").
-                equals("false")) {
+            if (System.getProperty("jexer.Swing.tripleBuffer") != null) {
+                if (System.getProperty("jexer.Swing.tripleBuffer").
+                    equals("false")) {
 
-                SwingScreen.tripleBuffer = false;
+                    SwingScreen.tripleBuffer = false;
+                }
             }
 
             setTitle("Jexer Application");
-- 
2.27.0