BAEL 1269 Intro to JSON-JAVA (#3493)

* Final commit

* Made changes as per last review

* Moved from core-java to json module

json/src/main/java/com/baeldung/jsonjava/JSONTokenerDemo.java

@@ -0,0 +1,13 @@
+package com.baeldung.jsonjava;
+
+import org.json.JSONTokener;
+
+public class JSONTokenerDemo {
+    public static void main(String[] args) {
+        JSONTokener jt = new JSONTokener("Sample String");
+         
+        while(jt.more()) {
+            System.out.println(jt.next());
+        }
+    }
+}