diff --git a/JSONArray.java b/JSONArray.java
index b2717d9..d853b1a 100644
--- a/JSONArray.java
+++ b/JSONArray.java
@@ -151,13 +151,12 @@ public class JSONArray implements Iterable<Object> {
      * @param collection
      *            A Collection.
      */
-    public JSONArray(Collection<Object> collection) {
+    public JSONArray(Collection<?> collection) {
         this.myArrayList = new ArrayList<Object>();
         if (collection != null) {
-            Iterator<Object> iter = collection.iterator();
-            while (iter.hasNext()) {
-                this.myArrayList.add(JSONObject.wrap(iter.next()));
-            }
+        	for (Object o: collection){
+        		this.myArrayList.add(JSONObject.wrap(o));
+        	}
         }
     }
 
@@ -746,7 +745,7 @@ public class JSONArray implements Iterable<Object> {
      *            A Collection value.
      * @return this.
      */
-    public JSONArray put(Collection<Object> value) {
+    public JSONArray put(Collection<?> value) {
         this.put(new JSONArray(value));
         return this;
     }
@@ -799,7 +798,7 @@ public class JSONArray implements Iterable<Object> {
      *            A Map value.
      * @return this.
      */
-    public JSONArray put(Map<String, Object> value) {
+    public JSONArray put(Map<?, ?> value) {
         this.put(new JSONObject(value));
         return this;
     }
@@ -848,7 +847,7 @@ public class JSONArray implements Iterable<Object> {
      * @throws JSONException
      *             If the index is negative or if the value is not finite.
      */
-    public JSONArray put(int index, Collection<Object> value) throws JSONException {
+    public JSONArray put(int index, Collection<?> value) throws JSONException {
         this.put(index, new JSONArray(value));
         return this;
     }
@@ -920,7 +919,7 @@ public class JSONArray implements Iterable<Object> {
      *             If the index is negative or if the the value is an invalid
      *             number.
      */
-    public JSONArray put(int index, Map<String, Object> value) throws JSONException {
+    public JSONArray put(int index, Map<?, ?> value) throws JSONException {
         this.put(index, new JSONObject(value));
         return this;
     }
diff --git a/JSONObject.java b/JSONObject.java
index ed1159e..0e8ff09 100755
--- a/JSONObject.java
+++ b/JSONObject.java
@@ -243,15 +243,13 @@ public class JSONObject {
      *            the JSONObject.
      * @throws JSONException
      */
-    public JSONObject(Map<String, Object> map) {
+    public JSONObject(Map<?, ?> map) {
         this.map = new HashMap<String, Object>();
         if (map != null) {
-            Iterator<Entry<String, Object>> i = map.entrySet().iterator();
-            while (i.hasNext()) {
-                Entry<String, Object> entry = i.next();
-                Object value = entry.getValue();
+        	for (final Entry<?, ?> e : map.entrySet()) {
+                final Object value = e.getValue();
                 if (value != null) {
-                    this.map.put(entry.getKey(), wrap(value));
+                    this.map.put(String.valueOf(e.getKey()), wrap(value));
                 }
             }
         }
@@ -1204,7 +1202,7 @@ public class JSONObject {
      * @return this.
      * @throws JSONException
      */
-    public JSONObject put(String key, Collection<Object> value) throws JSONException {
+    public JSONObject put(String key, Collection<?> value) throws JSONException {
         this.put(key, new JSONArray(value));
         return this;
     }
@@ -1268,7 +1266,7 @@ public class JSONObject {
      * @return this.
      * @throws JSONException
      */
-    public JSONObject put(String key, Map<String, Object> value) throws JSONException {
+    public JSONObject put(String key, Map<?, ?> value) throws JSONException {
         this.put(key, new JSONObject(value));
         return this;
     }
@@ -1663,13 +1661,11 @@ public class JSONObject {
             return value.toString();
         }
         if (value instanceof Map) {
-            @SuppressWarnings("unchecked")
-            Map<String, Object> map = (Map<String, Object>) value;
+            Map<?, ?> map = (Map<?, ?>) value;
             return new JSONObject(map).toString();
         }
         if (value instanceof Collection) {
-            @SuppressWarnings("unchecked")
-            Collection<Object> coll = (Collection<Object>) value;
+            Collection<?> coll = (Collection<?>) value;
             return new JSONArray(coll).toString();
         }
         if (value.getClass().isArray()) {
@@ -1707,16 +1703,14 @@ public class JSONObject {
             }
 
             if (object instanceof Collection) {
-                @SuppressWarnings("unchecked")
-                Collection<Object> coll = (Collection<Object>) object;
+                Collection<?> coll = (Collection<?>) object;
                 return new JSONArray(coll);
             }
             if (object.getClass().isArray()) {
                 return new JSONArray(object);
             }
             if (object instanceof Map) {
-                @SuppressWarnings("unchecked")
-                Map<String, Object> map = (Map<String, Object>) object;
+                Map<?, ?> map = (Map<?, ?>) object;
                 return new JSONObject(map);
             }
             Package objectPackage = object.getClass().getPackage();
@@ -1755,14 +1749,11 @@ public class JSONObject {
         } else if (value instanceof JSONArray) {
             ((JSONArray) value).write(writer, indentFactor, indent);
         } else if (value instanceof Map) {
-            @SuppressWarnings("unchecked")
-            Map<String, Object> map = (Map<String, Object>) value;
+            Map<?, ?> map = (Map<?, ?>) value;
             new JSONObject(map).write(writer, indentFactor, indent);
         } else if (value instanceof Collection) {
-            @SuppressWarnings("unchecked")
-            Collection<Object> coll = (Collection<Object>) value;
-            new JSONArray(coll).write(writer, indentFactor,
-                    indent);
+            Collection<?> coll = (Collection<?>) value;
+            new JSONArray(coll).write(writer, indentFactor, indent);
         } else if (value.getClass().isArray()) {
             new JSONArray(value).write(writer, indentFactor, indent);
         } else if (value instanceof Number) {