diff --git a/src/java/org/apache/commons/lang/concurrent/LazyInitializer.java b/src/java/org/apache/commons/lang/concurrent/LazyInitializer.java index 211afc702..efcba9bb0 100644 --- a/src/java/org/apache/commons/lang/concurrent/LazyInitializer.java +++ b/src/java/org/apache/commons/lang/concurrent/LazyInitializer.java @@ -42,9 +42,11 @@ package org.apache.commons.lang.concurrent; * to this class, a subclass of {@code LazyInitializer} has to be created: * *
- * public class ComplexObjectInitializer extends LazyInitializer<ComplexObject> {
+ * public class ComplexObjectInitializer extends LazyInitializer<ComplexObject>
+ * {
  *     @Override
- *     protected ComplexObject initialize() {
+ *     protected ComplexObject initialize()
+ *     {
  *         return new ComplexObject();
  *     }
  * }
@@ -75,7 +77,8 @@ package org.apache.commons.lang.concurrent;
  * @version $Id$
  * @param  the type of the object managed by this initializer class
  */
-public abstract class LazyInitializer {
+public abstract class LazyInitializer
+{
     /** Stores the managed object. */
     private volatile T object;
 
@@ -85,13 +88,19 @@ public abstract class LazyInitializer {
      *
      * @return the object initialized by this {@code LazyInitializer}
      */
-    public T get() {
+    public T get()
+    {
+        // use a temporary variable to reduce the number of reads of the
+        // volatile field
         T result = object;
 
-        if (result == null) {
-            synchronized (this) {
+        if (result == null)
+        {
+            synchronized (this)
+            {
                 result = object;
-                if (result == null) {
+                if (result == null)
+                {
                     object = result = initialize();
                 }
             }