2 files changed, 2 insertions, 2 deletions
diff --git a/json/src/main/java/org/json/JSONObject.java b/json/src/main/java/org/json/JSONObject.java
index e7ca735..4e03b5a 100644
--- a/json/src/main/java/org/json/JSONObject.java
+++ b/json/src/main/java/org/json/JSONObject.java
@@ -131,7 +131,7 @@ public class JSONObject {
              */
             String key = (String) entry.getKey();
             if (key == null) {
-                throw new NullPointerException();
+                throw new NullPointerException("key == null");
             }
             nameValuePairs.put(key, entry.getValue());
         }
diff --git a/json/src/main/java/org/json/JSONTokener.java b/json/src/main/java/org/json/JSONTokener.java
index ebfabe4..202e2e6 100644
--- a/json/src/main/java/org/json/JSONTokener.java
+++ b/json/src/main/java/org/json/JSONTokener.java
@@ -543,7 +543,7 @@ public class JSONTokener {
      */
     public String nextTo(String excluded) {
         if (excluded == null) {
-            throw new NullPointerException();
+            throw new NullPointerException("excluded == null");
         }
         return nextToInternal(excluded).trim();
     }