Apex JSON Parser

Below apex method helps in finding record corresponding to a key from the JSON.

public static String parserUtility(String jsonString, String recordType){
        try{
            JSONParser parser = JSON.createParser(jsonString);
            while (parser.nextToken() != null) {
                if (parser.getCurrentToken() == JSONToken.FIELD_NAME) {
                    parser.nextToken();
                    if(parser.getCurrentName() == recordType){
                        return parser.getText();
                    }
                }
            }
        }catch(Exception e){
          e.getMessage();
            return null;
        }
        return '';
    }

Example:

String jsonString = '{"size":1,"totalSize":1,"done":true,"queryLocator":null,"entityTypeName":"ApexOrgWideCoverage","records":[{"attributes":{"type":"ApexOrgWideCoverage","url":"/services/data/v39.0/tooling/sobjects/ApexOrgWideCoverage/716dddsdadfef"},"Id":"7134354580efdfsdf","PercentCovered":33}]}';

parserUtility(jsonString, 'PercentCovered');

it returns: 33