Priorityjobscheduler (#3583)

* priority based job execution in java

* minor fixes

* updated to use java 8 features

* fix need for type inference

* handle exception

* indentation

* handling exception generated during terminal of normal flow

* handling exception generated during terminal of normal flow

* added comment

core-java-concurrency/src/test/java/com/baeldung/concurrent/prioritytaskexecution/PriorityJobSchedulerUnitTest.java

@@ -30,7 +30,9 @@ public class PriorityJobSchedulerUnitTest {
         // delay to avoid job sleep (added for demo) being interrupted
         try {
             Thread.sleep(2000);
-        } catch (InterruptedException ignored) {
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+            throw new RuntimeException(e);
         }
         
         pjs.closeScheduler();