Index: java/nio/DirectByteBufferImpl.java
===================================================================
RCS file: /cvsroot/classpath/classpath/java/nio/DirectByteBufferImpl.java,v
retrieving revision 1.9
diff -u -r1.9 DirectByteBufferImpl.java
--- java/nio/DirectByteBufferImpl.java	12 Apr 2004 12:55:11 -0000	1.9
+++ java/nio/DirectByteBufferImpl.java	22 Apr 2004 07:27:17 -0000
@@ -136,15 +136,20 @@
     return this;
   }
   
-  static native void shiftDown (RawData address, int dst_offset, int src_offset, int count);
+  static native void shiftDown(RawData address, int dst_offset, int src_offset, int count);
 
+  void shiftDown(int dst_offset, int src_offset, int count)
+  {
+    shiftDown(address, dst_offset, src_offset, count);
+  }
+  
   public ByteBuffer compact ()
   {
     int pos = position();
     if (pos > 0)
       {
 	int count = remaining();
-	shiftDown(0, pos, count);
+	shiftDown(address, 0, pos, count);
 	position(count);
 	limit(capacity());
       }
Index: java/nio/MappedByteBufferImpl.java
===================================================================
RCS file: /cvsroot/classpath/classpath/java/nio/MappedByteBufferImpl.java,v
retrieving revision 1.8
diff -u -r1.8 MappedByteBufferImpl.java
--- java/nio/MappedByteBufferImpl.java	8 Apr 2004 21:25:59 -0000	1.8
+++ java/nio/MappedByteBufferImpl.java	22 Apr 2004 07:27:17 -0000
@@ -121,7 +121,8 @@
     if (pos > 0)
       {
 	int count = remaining();
-	shiftDown(0, pos, count);
+	// Call shiftDown method optimized for direct buffers.
+	DirectByteBufferImpl.shiftDown(address, 0, pos, count);
 	position(count);
 	limit(capacity());
       }