From 1c1cd9286defc866cbfafe6f8ce0ab92c5ba6e00 Mon Sep 17 00:00:00 2001
From: nitinvishwari <71441089+nitinvishwari@users.noreply.github.com>
Date: Fri, 25 Jul 2025 15:32:38 -0700
Subject: [PATCH 1/2] Not a good idea to use synchronized everytime while
 calling getIntance. I am commiting the better alternative.

---
 solutions/java/src/carrentalsystem/CarRentalSystem.java | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/solutions/java/src/carrentalsystem/CarRentalSystem.java b/solutions/java/src/carrentalsystem/CarRentalSystem.java
index 7736b606..e9307fcc 100644
--- a/solutions/java/src/carrentalsystem/CarRentalSystem.java
+++ b/solutions/java/src/carrentalsystem/CarRentalSystem.java
@@ -11,7 +11,7 @@
 import java.util.concurrent.ConcurrentHashMap;
 
 public class CarRentalSystem {
-    private static CarRentalSystem instance;
+    private static CarRentalSystem instance = new CarRentalSystem();
     private final Map<String, Car> cars;
     private final Map<String, Reservation> reservations;
     private final PaymentProcessor paymentProcessor;
@@ -23,9 +23,6 @@ private CarRentalSystem() {
     }
 
     public static synchronized CarRentalSystem getInstance() {
-        if (instance == null) {
-            instance = new CarRentalSystem();
-        }
         return instance;
     }
 

From 583ed40db9c9e9900249ed7da6fbf7e3bd493f29 Mon Sep 17 00:00:00 2001
From: nitinvishwari <71441089+nitinvishwari@users.noreply.github.com>
Date: Fri, 25 Jul 2025 15:46:14 -0700
Subject: [PATCH 2/2] removed synchronized

---
 solutions/java/src/carrentalsystem/CarRentalSystem.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/solutions/java/src/carrentalsystem/CarRentalSystem.java b/solutions/java/src/carrentalsystem/CarRentalSystem.java
index e9307fcc..0e871627 100644
--- a/solutions/java/src/carrentalsystem/CarRentalSystem.java
+++ b/solutions/java/src/carrentalsystem/CarRentalSystem.java
@@ -22,7 +22,7 @@ private CarRentalSystem() {
         paymentProcessor = new CreditCardPaymentProcessor();
     }
 
-    public static synchronized CarRentalSystem getInstance() {
+    public static CarRentalSystem getInstance() {
         return instance;
     }