From 24f258848c67500d347f9cce051f27aecda48f97 Mon Sep 17 00:00:00 2001
From: shaiktaj <shaiktaj2003@gmail.com>
Date: Thu, 25 May 2017 11:04:30 -0500
Subject: [PATCH] Updated ThreadSafeLazyLoadedivoryTower

Added null check in private constructor to prevent instantiating by Reflection call
---
 .../iluwatar/singleton/ThreadSafeLazyLoadedIvoryTower.java | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/singleton/src/main/java/com/iluwatar/singleton/ThreadSafeLazyLoadedIvoryTower.java b/singleton/src/main/java/com/iluwatar/singleton/ThreadSafeLazyLoadedIvoryTower.java
index 0b1b51b23..68f190d46 100644
--- a/singleton/src/main/java/com/iluwatar/singleton/ThreadSafeLazyLoadedIvoryTower.java
+++ b/singleton/src/main/java/com/iluwatar/singleton/ThreadSafeLazyLoadedIvoryTower.java
@@ -33,7 +33,12 @@ public final class ThreadSafeLazyLoadedIvoryTower {
 
   private static ThreadSafeLazyLoadedIvoryTower instance;
 
-  private ThreadSafeLazyLoadedIvoryTower() {}
+  private ThreadSafeLazyLoadedIvoryTower() {
+  // to prevent instantiating by Reflection call
+    if (instance != null) {
+      throw new IllegalStateException("Already initialized.");
+    }
+  }
 
   /**
    * The instance gets created only when it is called for first time. Lazy-loading