Test AtomicInteger

Author: winterbe

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());
+ }
+
+}

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();