From 47385f0a58cb6f4fb0aecfe47ac4685e9ca71848 Mon Sep 17 00:00:00 2001
From: ybs <2606424906@qq.com>
Date: Tue, 2 Aug 2022 22:52:33 +0800
Subject: [PATCH] fix boolean return value npe

---
 src/main/java/com/github/hcsp/datatype/Light.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/main/java/com/github/hcsp/datatype/Light.java b/src/main/java/com/github/hcsp/datatype/Light.java
index bf1c09e..113b5f9 100644
--- a/src/main/java/com/github/hcsp/datatype/Light.java
+++ b/src/main/java/com/github/hcsp/datatype/Light.java
@@ -13,7 +13,8 @@ public Light(Boolean on) {
 
     // 当灯亮时返回true，灭和未知状态返回false
     public boolean isOn() {
-        return on;
+
+        return on != null && on;
     }
 
     public Boolean isOnRawValue() {