如何使用Java从json文件的对象中的对象获取数据

Question

See the following Code

socialMedia: 
{
      facebook: {
           profileUrl: "https://www.facebook.com/pages/Mystic-Muffin/522896574410517?rf=157791610910510"
                }
}

From the above we have to get the data

profileUrl: https://www.facebook.com/pages/Mystic-Muffin/522896574410517?rf=157791610910510

I am using the following code

JSONObject web=(JSONObject) jsonObject.get("socialMedia");
JSONObject web1=(JSONObject) jsonObject.get("facebook")
    String fburl=(String) web.get("profileUrl");

i am getting the java.lang.NullPointerException

Help me to get this

Answer 1

JSONObject web=(JSONObject) jsonObject.get("socialMedia");
JSONObject web1=(JSONObject) web.get("facebook")
String fburl=(String) web1.get("profileUrl");