From efb631f0176e7179212c9d98d5a70a24e901ace2 Mon Sep 17 00:00:00 2001
From: IgorNB <igornb.mail@gmail.com>
Date: Wed, 2 Oct 2019 19:55:06 +0300
Subject: [PATCH] safe semaphore.release in finally block

---
 .../com/baeldung/concurrent/semaphore/SemaPhoreDemo.java   | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/core-java-modules/core-java-concurrency-basic/src/main/java/com/baeldung/concurrent/semaphore/SemaPhoreDemo.java b/core-java-modules/core-java-concurrency-basic/src/main/java/com/baeldung/concurrent/semaphore/SemaPhoreDemo.java
index 211ae78c1f..153853a5b8 100644
--- a/core-java-modules/core-java-concurrency-basic/src/main/java/com/baeldung/concurrent/semaphore/SemaPhoreDemo.java
+++ b/core-java-modules/core-java-concurrency-basic/src/main/java/com/baeldung/concurrent/semaphore/SemaPhoreDemo.java
@@ -11,9 +11,12 @@ public class SemaPhoreDemo {
 		System.out.println("Available permit : " + semaphore.availablePermits());
 		System.out.println("Number of threads waiting to acquire: " + semaphore.getQueueLength());
 
-		if (semaphore.tryAcquire()) {
+		if (semaphore.tryAcquire()) 
+			try {		
 			// perform some critical operations
-			semaphore.release();
+			} finally {
+				semaphore.release();
+			}
 		}
 
 	}