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How to analyse Json data from Url (JSON-API)?

+1 vote
53 views

Please help me with following -
1. Write a java program to get json data from URL http://echo.jsontest.com/Operand1/10/Operand2/5/Operator/+
2. Perform mathematical operation in java after reading JSON from above URL and print result.for ex.result=10+5=15
3. Result should be dynamic and should change if change values in above URL.

posted Feb 5, 2016 by anonymous

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Will it solve by printing on consol or some other method.?please anyone can help me out..

1 Answer

0 votes

This link is not working, anyway I got the problem and providing the steps
1.Read the URL and get the JSON string something like

  public static JSONObject readJsonFromUrl(String url) throws IOException, JSONException {
    InputStream is = new URL(url).openStream();
    try {
      BufferedReader rd = new BufferedReader(new InputStreamReader(is, Charset.forName("UTF-8")));
      String jsonText = readAll(rd);
      JSONObject json = new JSONObject(jsonText);
      return json;
    } finally {
      is.close();
    }
  }

2.Decode the JSON string something like

JSONObject json = readJsonFromUrl("<Your URL>");
System.out.println(json.get("opr1"));
System.out.println(json.get("opr2"));
System.out.println(json.get("operator"));

3.Rest is simple and leave it to you how you would solve it, just need to use opr1, opr2 and operator :)

answer Feb 5, 2016 by Salil Agrawal
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