Test AtomicInteger

winterbe · winterbe · commit e8cc2fc68ce9 · 2015-04-11T08:13:28.000+02:00
diff --git a/src/com/winterbe/java8/samples/concurrent/Atomic1.java b/src/com/winterbe/java8/samples/concurrent/Atomic1.java
@@ -0,0 +1,34 @@
+package com.winterbe.java8.samples.concurrent;
+
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.stream.IntStream;
+
+/**
+ * @author Benjamin Winterberg
+ */
+public class Atomic1 {
+
+    private static final int NUM_INCREMENTS = 10000;
+
+    private static AtomicInteger count = new AtomicInteger(0);
+
+    public static void main(String[] args) {
+        testIncrement();
+    }
+
+    private static void testIncrement() {
+        count.set(0);
+
+        ExecutorService executor = Executors.newFixedThreadPool(2);
+
+        IntStream.range(0, NUM_INCREMENTS)
+                .forEach(i -> executor.submit(count::incrementAndGet));
+
+        ConcurrentUtils.stop(executor);
+
+        System.out.format("Expected=%d; Is=%d", NUM_INCREMENTS, count.get());
+    }
+
+}
diff --git a/src/com/winterbe/java8/samples/concurrent/Synchronized1.java b/src/com/winterbe/java8/samples/concurrent/Synchronized1.java
@@ -11,7 +11,7 @@ public class Synchronized1 {
 
     private static final int NUM_INCREMENTS = 10000;
 
-    private static int count = 1;
+    private static int count = 0;
 
     public static void main(String[] args) {
         testSyncIncrement();
