add Serializable to util classes

[sbp.git] / src / edu / berkeley / sbp / util / EmptyIterator.java

diff --git a/src/edu/berkeley/sbp/util/EmptyIterator.java b/src/edu/berkeley/sbp/util/EmptyIterator.java
index 2c099f3..bcb2aa5 100644 (file)
--- a/src/edu/berkeley/sbp/util/EmptyIterator.java
+++ b/src/edu/berkeley/sbp/util/EmptyIterator.java
@@ -2,8 +2,9 @@
 
 package edu.berkeley.sbp.util;
 import java.util.*;
+import java.io.*;
 
-public final class EmptyIterator<T> implements Iterable<T>, Iterator<T> {
+public final class EmptyIterator<T> implements Iterable<T>, Iterator<T>, Serializable {
     public void        remove()   { throw new Error(); }
     public boolean     hasNext()  { return false; }
     public T           next()     { throw new Error(); }