Synchronized statement example

winterbe · winterbe · commit c1117a9fd147 · 2015-04-18T08:05:46.000+02:00
diff --git a/src/com/winterbe/java8/samples/concurrent/Synchronized2.java b/src/com/winterbe/java8/samples/concurrent/Synchronized2.java
@@ -0,0 +1,39 @@
+package com.winterbe.java8.samples.concurrent;
+
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.stream.IntStream;
+
+/**
+ * @author Benjamin Winterberg
+ */
+public class Synchronized2 {
+
+    private static final int NUM_INCREMENTS = 10000;
+
+    private static int count = 0;
+
+    public static void main(String[] args) {
+        testSyncIncrement();
+    }
+
+    private static void testSyncIncrement() {
+        count = 0;
+
+        ExecutorService executor = Executors.newFixedThreadPool(2);
+
+        IntStream.range(0, NUM_INCREMENTS)
+                .forEach(i -> executor.submit(Synchronized2::incrementSync));
+
+        ConcurrentUtils.stop(executor);
+
+        System.out.println(count);
+    }
+
+    private static void incrementSync() {
+        synchronized (Synchronized2.class) {
+            count = count + 1;
+        }
+    }
+
+}
