diff -r fe3567c7b522 -r f66bcda82345 rt/emul/mini/src/main/java/java/lang/Character.java
--- a/rt/emul/mini/src/main/java/java/lang/Character.java	Sat Sep 07 13:56:22 2013 +0200
+++ b/rt/emul/mini/src/main/java/java/lang/Character.java	Sun Sep 22 21:42:48 2013 +0200
@@ -2375,7 +2375,14 @@
      * @since   1.5
      */
     public static boolean isWhitespace(int codePoint) {
-        throw new UnsupportedOperationException();
+        if (
+            codePoint == SPACE_SEPARATOR || 
+            codePoint == LINE_SEPARATOR || 
+            codePoint == PARAGRAPH_SEPARATOR
+        ) {
+            return true;
+        }
+        return false;
     }
 
     /**