NPE
diff --git a/src/share/classes/java/awt/event/KeyEvent.java b/src/share/classes/java/awt/event/KeyEvent.java
index 14ed2c7..002d536 100644
--- a/src/share/classes/java/awt/event/KeyEvent.java
+++ b/src/share/classes/java/awt/event/KeyEvent.java
@@ -1258,7 +1258,8 @@
         }
 
         if (keyCode > 0x0300 && keyCode < 0x0400) {
-            return asciiCodeToString.get(keyCode);
+            String asciiCodeStringRepresentation = asciiCodeToString.get(keyCode);
+            if (asciiCodeStringRepresentation != null) return asciiCodeStringRepresentation;
         }
 
         switch(keyCode) {