Java 11 migrate remaining q-r (#1121)

* Moves queue-load-leveling to Java 11

* Moves reactor to Java 11

* Moves reader-writer-lock to Java 11

* Moves repository to Java 11

* Moves resource-acquisition-is-initialization to Java 11

* Moves retry to Java 11

* Moves role-object to Java 11

queue-load-leveling/src/test/java/com/iluwatar/queue/load/leveling/AppTest.java

@@ -25,15 +25,12 @@ package com.iluwatar.queue.load.leveling;
 
 import org.junit.jupiter.api.Test;
 
-import java.io.IOException;
-
 /**
  * Application Test
  */
 public class AppTest {
   @Test
-  public void test() throws IOException {
-    String[] args = {};
-    App.main(args);
+  public void test() {
+    App.main(new String[]{});
   }
 }

queue-load-leveling/src/test/java/com/iluwatar/queue/load/leveling/MessageQueueTest.java

@@ -23,25 +23,23 @@
 
 package com.iluwatar.queue.load.leveling;
 
-import org.junit.jupiter.api.Test;
-
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
+import org.junit.jupiter.api.Test;
+
 /**
- * 
  * Test case for submitting and retrieving messages from Blocking Queue.
- * 
  */
 public class MessageQueueTest {
 
   @Test
   public void messageQueueTest() {
-    
-    MessageQueue msgQueue = new MessageQueue();
-    
+
+    var msgQueue = new MessageQueue();
+
     // submit message
     msgQueue.submitMsg(new Message("MessageQueue Test"));
-    
+
     // retrieve message
     assertEquals("MessageQueue Test", msgQueue.retrieveMsg().getMsg());
   }

queue-load-leveling/src/test/java/com/iluwatar/queue/load/leveling/MessageTest.java

@@ -23,23 +23,21 @@
 
 package com.iluwatar.queue.load.leveling;
 
-import org.junit.jupiter.api.Test;
-
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
+import org.junit.jupiter.api.Test;
+
 /**
- * 
  * Test case for creating and checking the Message.
- * 
  */
 public class MessageTest {
-  
+
   @Test
   public void messageTest() {
-    
+
     // Parameterized constructor test.
-    String testMsg = "Message Test";
-    Message msg = new Message(testMsg);
+    var testMsg = "Message Test";
+    var msg = new Message(testMsg);
     assertEquals(testMsg, msg.getMsg());
   }
 }

queue-load-leveling/src/test/java/com/iluwatar/queue/load/leveling/TaskGenSrvExeTest.java

@@ -26,25 +26,23 @@ package com.iluwatar.queue.load.leveling;
 import org.junit.jupiter.api.Test;
 
 /**
- * 
- * Test case for submitting Message to Blocking Queue by TaskGenerator
- * and retrieve the message by ServiceExecutor.
- * 
+ * Test case for submitting Message to Blocking Queue by TaskGenerator and retrieve the message by
+ * ServiceExecutor.
  */
 public class TaskGenSrvExeTest {
 
   @Test
   public void taskGeneratorTest() {
-    MessageQueue msgQueue = new MessageQueue();
-    
+    var msgQueue = new MessageQueue();
+
     // Create a task generator thread with 1 job to submit.
-    Runnable taskRunnable = new TaskGenerator(msgQueue, 1);
-    Thread taskGenThr = new Thread(taskRunnable);
+    var taskRunnable = new TaskGenerator(msgQueue, 1);
+    var taskGenThr = new Thread(taskRunnable);
     taskGenThr.start();
-    
+
     // Create a service executor thread.
-    Runnable srvRunnable = new ServiceExecutor(msgQueue);
-    Thread srvExeThr = new Thread(srvRunnable);
+    var srvRunnable = new ServiceExecutor(msgQueue);
+    var srvExeThr = new Thread(srvRunnable);
     srvExeThr.start();
   }