diff --git a/src/main/java/org/json/JSONArray.java b/src/main/java/org/json/JSONArray.java
index 30f5a8f..2a3c553 100644
--- a/src/main/java/org/json/JSONArray.java
+++ b/src/main/java/org/json/JSONArray.java
@@ -105,6 +105,8 @@ public class JSONArray implements Iterable<Object> {
         if (nextChar == 0) {
             // array is unclosed. No ']' found, instead EOF
             throw x.syntaxError("Expected a ',' or ']'");
+        } else if (nextChar==',' && jsonParserConfiguration.isStrictMode()) {
+        	 throw x.syntaxError("Array content starts with a ','");
         }
         if (nextChar != ']') {
             x.back();
diff --git a/src/main/java/org/json/JSONTokener.java b/src/main/java/org/json/JSONTokener.java
index 05a6e34..07ff18c 100644
--- a/src/main/java/org/json/JSONTokener.java
+++ b/src/main/java/org/json/JSONTokener.java
@@ -509,6 +509,9 @@ public class JSONTokener {
         string = sb.toString().trim();
         if ("".equals(string)) {
             throw this.syntaxError("Missing value");
+        }  else if (jsonParserConfiguration != null &&
+                jsonParserConfiguration.isStrictMode() && string.endsWith(".")) {
+            throw this.syntaxError(String.format("Strict mode error: Value '%s' ends with dot", string));
         }
         Object obj = JSONObject.stringToValue(string);
         // if obj is a boolean, look at string