@@ -473,7 +473,7 @@ public Object get(String key) throws JSONException {
         }
         Object object = this.opt(key);
         if (object == null) {
-            throw new JSONException("JSONObject[" + quote(key) + "] not found.");
+            return "";
         }
         return object;
     }
@@ -574,6 +574,8 @@ public JSONArray getJSONArray(String key) throws JSONException {
      */
     public JSONObject getJSONObject(String key) throws JSONException {
         Object object = this.get(key);
+        if (object == null) 
+        	return null;
         if (object instanceof JSONObject) {
             return (JSONObject) object;
         }
@@ -1284,45 +1286,6 @@ public Object remove(String key) {
         return this.map.remove(key);
     }
 
-    /**
-     * Determine if two JSONObjects are similar.
-     * They must contain the same set of names which must be associated with
-     * similar values.
-     *
-     * @param other The other JSONObject
-     * @return true if they are equal
-     */
-    public boolean similar(Object other) {
-        try {
-            if (!(other instanceof JSONObject)) {
-                return false;
-            }
-            Set<String> set = this.keySet();
-            if (!set.equals(((JSONObject)other).keySet())) {
-                return false;
-            }
-            Iterator<String> iterator = set.iterator();
-            while (iterator.hasNext()) {
-                String name = iterator.next();
-                Object valueThis = this.get(name);
-                Object valueOther = ((JSONObject)other).get(name);
-                if (valueThis instanceof JSONObject) {
-                    if (!((JSONObject)valueThis).similar(valueOther)) {
-                        return false;
-                    }
-                } else if (valueThis instanceof JSONArray) {
-                    if (!((JSONArray)valueThis).similar(valueOther)) {
-                        return false;
-                    }
-                } else if (!valueThis.equals(valueOther)) {
-                    return false;
-                }
-            }
-            return true;
-        } catch (Throwable exception) {
-            return false;
-        }
-    }
 
     /**
      * Try to convert a string into a number, boolean, or null. If the string