gistfile1.diff

Index: src/desktop/com/jme3/system/Natives.java
===================================================================
--- src/desktop/com/jme3/system/Natives.java	(revision 8731)
+++ src/desktop/com/jme3/system/Natives.java	(working copy)
@@ -45,7 +45,6 @@
 
 /**
  * Helper class for extracting the natives (dll, so) from the jars.
- * This class should only be used internally.
  */
 public class Natives {
 
@@ -114,15 +113,19 @@
         }
     }
 
-    protected static void extractNativeLib(String sysName, String name) throws IOException {
+    public static void extractNativeLib(String sysName, String name) throws IOException {
         extractNativeLib(sysName, name, false, true);
     }
 
-    protected static void extractNativeLib(String sysName, String name, boolean load) throws IOException {
+    public static void extractNativeLib(String sysName, String name, boolean load) throws IOException {
         extractNativeLib(sysName, name, load, true);
     }
 
-    protected static void extractNativeLib(String sysName, String name, boolean load, boolean warning) throws IOException {
+    
+    public static void extractNativeLib(String sysName, String name, boolean load, boolean warning) throws IOException{ 
+	
         String fullname = System.mapLibraryName(name);
 
         String path = "native/" + sysName + "/" + fullname;
@@ -142,14 +145,15 @@
 
         try {
             if (targetFile.exists()) {
-                // OK, compare last modified date of this file to 
-                // file in jar
+                // OK, compare last modified date and size of this file to file in jar.
                 long targetLastModified = targetFile.lastModified();
                 long sourceLastModified = conn.getLastModified();
-
+                long targetLength = targetFile.length();
+                long sourceLength = conn.getContentLength();
                 // Allow ~1 second range for OSes that only support low precision
-                if (targetLastModified + 1000 > sourceLastModified) {
-                    logger.log(Level.FINE, "Not copying library {0}. Latest already extracted.", fullname);
+                
+                if ((targetLength == sourceLength) && (targetLastModified + 1000 > sourceLastModified)) {             
+                	logger.log(Level.FINE, "Not copying library {0}. Latest already extracted.", fullname);
                     return;
                 }
             }
@@ -182,7 +186,7 @@
 
     protected static boolean isUsingNativeBullet() {
         try {
-            Class clazz = Class.forName("com.jme3.bullet.util.NativeMeshUtil");
+            Class<?> clazz = Class.forName("com.jme3.bullet.util.NativeMeshUtil");
             return clazz != null;
         } catch (ClassNotFoundException ex) {
             return false;