内部包含map的Java枚举？

Question

我有以下枚举。我需要通过代码获取描述。我有以下代码。它正在工作，但仍可以改进吗？

public enum Maps {

    COLOR_RED("ABC", "abc description");

    private final String code;
    private final String description;
    private static Map<String, String> mMap;

    private Maps(String code, String description) {
        this.code = code;
        this.description = description;
    }
    public String getCode() {
        return code;
    }

    public String getDescription() {
        return description;
    }


    public static String getDescriptionByCode(String code) {
        if (mMap == null) {
            initializeMapping();
        }
        if (mMap.containsKey(code)) {
            return mMap.get(code);
        }
        return null;
    }

    private static void initializeMapping() {
        mMap = new HashMap<String, String>();
        for (Maps s : Maps.values()) {
            mMap.put(s.code, s.description);
        }
    }
}