Synchronized statement example

Author: winterbe

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;
+ }
+ }
+
+}