I am trying to create JSON query string for MongoDB, In order to support regular expression I need to create JSON string that has values without quotes. How do accomplish this in java,

Here is the example of what I am trying to do,

```
  JSONObject obj= new JSONObject();
  String title = "gro";
  obj.put("title", "/.*" + title + ".*/");

```

Result is

```
   {"title ":"/.*gro.*/"}

```

Above is no longer treated as a regular expression by MongoDB. What i wanted is,

```
   {"title ":/.*gro.*/}

```

So that MongoDB treats it as a regular expression. Is there any way to accomplish this in java?