JSONObject - How to get a value?

I'm using a java class on http://json.org/javadoc/org/json/JSONObject.html.

The following is my code snippet:

String jsonResult = UtilMethods.getJSON(this.jsonURL, null);
json = new JSONObject(jsonResult);

getJSON returns the following string

{"LabelData":{"slogan":"AWAKEN YOUR SENSES","jobsearch":"JOB SEARCH","contact":"CONTACT","video":"ENCHANTING BEACHSCAPES","createprofile":"CREATE PROFILE"}}

How do I get the value of 'slogan'?

I tried all the methods listed on the page, but none of them worked.

String loudScreaming = json.getJSONObject("LabelData").getString("slogan");

If it's a deeper key/value you're after and you're not dealing with arrays of keys/values at each level, you could recursively search the tree:

public static String recurseKeys(JSONObject jObj, String findKey) throws JSONException {
    String finalValue = "";
    if (jObj == null) {
        return "";
    }
    
    Iterator<String> keyItr = jObj.keys();
    Map<String, String> map = new HashMap<>();
    
    while(keyItr.hasNext()) {
        String key = keyItr.next();
        map.put(key, jObj.getString(key));
    }
    
    for (Map.Entry<String, String> e : (map).entrySet()) {
        String key = e.getKey();
        if (key.equalsIgnoreCase(findKey)) {
            return jObj.getString(key);
        }
        
        // read value
        Object value = jObj.get(key);
        
        if (value instanceof JSONObject) {
            finalValue = recurseKeys((JSONObject)value, findKey);
        }
    }
    
    // key is not found
    return finalValue;
}

Usage:

JSONObject jObj = new JSONObject(jsonString);
String extract = recurseKeys(jObj, "extract");

Using Map code from https://stackoverflow.com/a/4149555/2301224

You can try the below function to get value from JSON string,

public static String GetJSONValue(String JSONString, String Field)
{
       return JSONString.substring(JSONString.indexOf(Field), JSONString.indexOf("\n", JSONString.indexOf(Field))).replace(Field+"\": \"", "").replace("\"", "").replace(",","");	
}

This may be helpful while searching keys present in nested objects and nested arrays. And this is a generic solution to all cases.

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

public class MyClass
{
    public static Object finalresult = null;
    public static void main(String args[]) throws JSONException
    {
        System.out.println(myfunction(myjsonstring,key));
    }

    public static Object myfunction(JSONObject x,String y) throws JSONException
    {
        JSONArray keys =  x.names();
		for(int i=0;i<keys.length();i++)
		{
			if(finalresult!=null)
			{
				return finalresult;                     //To kill the recursion
			}

			String current_key = keys.get(i).toString();

			if(current_key.equals(y))
			{
				finalresult=x.get(current_key);
				return finalresult;
			}
			
			if(x.get(current_key).getClass().getName().equals("org.json.JSONObject"))
			{
				myfunction((JSONObject) x.get(current_key),y);
			}
			else if(x.get(current_key).getClass().getName().equals("org.json.JSONArray"))
			{
				for(int j=0;j<((JSONArray) x.get(current_key)).length();j++)
				{
					if(((JSONArray) x.get(current_key)).get(j).getClass().getName().equals("org.json.JSONObject"))
					{
						myfunction((JSONObject)((JSONArray) x.get(current_key)).get(j),y);
					}
				}
			}
		}
		return null;
	}
}

Possibilities:

1. "key":"value"
2. "key":{Object}
3. "key":[Array]

Logic :

• I check whether the current key and search key are the same, if so I return the value of that key.
• If it is an object, I send the value recursively to the same function.
• If it is an array, I check whether it contains an object, if so I recursively pass the value to the same function.