Using LinkedHashMap to preserve property order.

Author: jmccullough

JSONObject.java

@@ -32,7 +32,7 @@ of this software and associated documentation files (the "Software"), to deal
 import java.lang.reflect.Modifier;
 import java.util.Collection;
 import java.util.Enumeration;
-import java.util.HashMap;
+import java.util.LinkedHashMap;
 import java.util.Iterator;
 import java.util.Locale;
 import java.util.Map;
@@ -152,7 +152,7 @@ public String toString() {
      * Construct an empty JSONObject.
      */
     public JSONObject() {
-        this.map = new HashMap<String, Object>();
+        this.map = new LinkedHashMap<String, Object>();
     }
 
     /**
@@ -243,7 +243,7 @@ public JSONObject(JSONTokener x) throws JSONException {
      * @throws JSONException
      */
     public JSONObject(Map<String, Object> map) {
-        this.map = new HashMap<String, Object>();
+        this();
         if (map != null) {
             Iterator<Entry<String, Object>> i = map.entrySet().iterator();
             while (i.hasNext()) {