Conveniently map between enum and int / String

Question

When working with variables/parameters that can only take a finite number of values, I try to always use Java\'s enum, as in

public enum BonusT         


        

Answer 1

Int -->String :

public enum Country {

    US("US",0),
    UK("UK",2),
    DE("DE",1);


    private static Map domainToCountryMapping; 
    private String country;
    private int domain;

    private Country(String country,int domain){
        this.country=country.toUpperCase();
        this.domain=domain;
    }

    public String getCountry(){
        return country;
    }


    public static String getCountry(String domain) {
        if (domainToCountryMapping == null) {
            initMapping();
        }

        if(domainToCountryMapping.get(domain)!=null){
            return domainToCountryMapping.get(domain);
        }else{
            return "US";
        }

    }

     private static void initMapping() {
         domainToCountryMapping = new HashMap();
            for (Country s : values()) {
                domainToCountryMapping.put(s.domain, s.country);
            }
        }