From 917b2fa55375ecbdd52e913ee34d314952361350 Mon Sep 17 00:00:00 2001
From: BeckPond <jeremylu0724@gmail.com>
Date: Wed, 12 Jun 2019 17:18:00 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8D=E8=BF=94=E5=9B=9E=E5=80=BC?=
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---
 src/main/java/com/github/hcsp/datatype/Light.java | 6 +++++-
 1 file changed, 5 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 ccfa68a..a823554 100644
--- a/src/main/java/com/github/hcsp/datatype/Light.java
+++ b/src/main/java/com/github/hcsp/datatype/Light.java
@@ -13,6 +13,10 @@ 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;
+        if(on==null) {
+            return false;
+        }else{
+            return on;
+        }
     }
 }