Neat little JSON parser, grabs outer level keys from a JSONObject that has been converted to a string with toString() and returns them in an ArrayList

jsonParser.java

    /**
     * getNames() - Returns ArrayList of Strings that are outer-most keys of a JSONObject that has been converted
     * to a String with the toString() method (JSON4J)
     * @author martinlj
     * @param json - JSONObject that has been converted to a string with toString()
     */
    private ArrayList<String> getNames(String json){
    	//Strip outer curly braces
    	json = json.substring(1,json.length()-1);
    	ArrayList<String> names = new ArrayList<String>();
    	String outerKey = "";
    	int curlyCount = 0;
    	int commaIndex = 0;
    	for(int i=0; i<json.length(); i++){
    		if(json.charAt(i) == ':' && curlyCount == 0){
    			outerKey = json.substring(commaIndex+1,i);
    			//Strip quotes if needed
    			if(outerKey.charAt(0)== '\"'){
    				outerKey = outerKey.substring(1);
    			}
    			if(outerKey.charAt(outerKey.length()-1) == '\"'){
    				outerKey = outerKey.substring(0,outerKey.length()-1);
    			}
    			//Add to ArrayList
    			names.add(outerKey);
    		}
    		else if(json.charAt(i) == '{'){
    			curlyCount++;
    		}
    		else if(json.charAt(i) == '}'){
    			curlyCount--;
    		}
    		else if(json.charAt(i) == ','){
    			commaIndex = i;
    		}
    	}
    	return names;
    }