Java JSON Parser: Recursively parse any JSON and print the output.

JSONParser.java

package preiss;

import java.util.Iterator;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

public class JSONParser {
public static void main(String[] args) {

		 
		 
		 String json = "{"+
				 "\"access_codes_count\": 1,"+
				 "\"access_codes\": ["+
				 "{"+
				 "\"user_id\":\"132456789\","+
				 "\"recorded_at\":\"2015-06-21 11:11:36 +0200\","+
				 "\"subscription_awarded\" : true,"+
				 "\"access_id\" : 8856722394824735,"+
				 "\"subscription\": {"+
			     "\"valid_from\":\"2015-06-24 11:11:37 +0200\","+
			     "\"terminated_at\":null,"+
			     "\"suspended\":false,"+
			     "\"subscription_type\":\"premium\""+
			     "}"+
				 "},"+
				 "{"+
				 "\"user_id\":\"132456789\","+
				 "\"recorded_at\":\"2015-06-21 11:11:36 +0200\","+
				 "\"subscription_awarded\" : true,"+
				 "\"access_id\" : 8856722394824735,"+
				 "\"subscription\": {"+
			     "\"valid_from\":\"2015-06-24 11:11:37 +0200\","+
			     "\"terminated_at\":null,"+
			     "\"suspended\":false,"+
			     "\"subscription_type\":\"premium\""+
			     "}"+
				 "}"+
				 "]"+
				 "}";

		
		
		JSONParser jp = new JSONParser();
		jp.parse(json);
	}
	
	
public void parse(String json) {
try{ 
    JSONObject jsonObj = new JSONObject(json);   
    parse("","",jsonObj,0);
}catch(Exception e){
	System.out.println(e.getMessage());
}

}

  
  public void parse(String grandParentKey, String parentKey, JSONObject json, int count) throws JSONException {
	    @SuppressWarnings("unchecked")
		Iterator<String> keys = json.keys();
	    while (keys.hasNext()) {
	      String key = keys.next();
	      Object val = null;
	      
	      val = json.get(key);

	      if (val.getClass().getTypeName().contains("JSONArray")){
        	JSONArray jArr = (JSONArray) val;
        	for(int i=0; i<jArr.length(); i++){
        		count++;
        		JSONObject childJSONObject = jArr.getJSONObject(i);
        		parse(parentKey, key, childJSONObject, count);
        	}
	       
	      }else if (val.getClass().getTypeName().equals("org.json.JSONObject")){
	    	  parse(parentKey, key, (JSONObject) val, count);    
	      
	      }else{	
	    	if (val.getClass().getTypeName().toString().equals("org.json.JSONObject$Null")){
			    	 val="null";  
			}
		    if (val != null) {
		    	  String s1 ="";
		    	  if(!grandParentKey.isEmpty()){
		    		  s1 =  grandParentKey + count +"."+ parentKey + "." + key;
		    	  }else if (!parentKey.isEmpty()){
		    		  s1 =  parentKey +count+ "." + key;
		    	  } else {
		    		  s1 = key;
		    	  }
		    	
		    	
		          System.out.println("KEY: " + s1);
		          System.out.println("VALUE: " + val.toString());
		          System.out.println("-----");
	
		    }
	      }
	    }
	    
	 }//End Method
  
}