Index: java/nio/channels/spi/AbstractSelectableChannel.java
===================================================================
RCS file: /cvsroot/classpath/classpath/java/nio/channels/spi/AbstractSelectableChannel.java,v
retrieving revision 1.15
diff -u -r1.15 AbstractSelectableChannel.java
--- java/nio/channels/spi/AbstractSelectableChannel.java	8 Apr 2004 20:59:20 -0000	1.15
+++ java/nio/channels/spi/AbstractSelectableChannel.java	21 Apr 2004 10:45:45 -0000
@@ -216,6 +216,9 @@
     if (! isOpen())
       throw new ClosedChannelException();
 
+    if ((ops & ~validOps()) != 0)
+      throw new IllegalArgumentException();
+    
     SelectionKey key = null;
     AbstractSelector selector = (AbstractSelector) selin;