Lock examples

winterbe · winterbe · commit 2428f6294fe5 · 2015-04-20T07:31:37.000+02:00
diff --git a/src/com/winterbe/java8/samples/concurrent/Lock2.java b/src/com/winterbe/java8/samples/concurrent/Lock2.java
@@ -2,6 +2,7 @@
 
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
+import java.util.concurrent.TimeUnit;
 import java.util.concurrent.locks.ReentrantLock;
 
 /**
@@ -18,11 +19,23 @@ public static void main(String[] args) {
             lock.lock();
             try {
                 System.out.println(lock.isLocked());
-            } finally {
+                TimeUnit.SECONDS.sleep(1);
+            }
+            catch (InterruptedException e) {
+                throw new IllegalStateException(e);
+            }
+            finally {
                 lock.unlock();
             }
         });
 
+        executor.submit(() -> {
+            System.out.println("Locked: " + lock.isLocked());
+            System.out.println("Held by me: " + lock.isHeldByCurrentThread());
+            boolean locked = lock.tryLock();
+            System.out.println("Lock acquired: " + locked);
+        });
+
         ConcurrentUtils.stop(executor);
     }
 
