定义 #

public enum DnsErrorCode {

    OK(0),
    UNKNOWN(-1),
    INVALID_FUTURE(-2),
    EMPTY_CACHE(-3),
    INVALID_HOST(-4),
    PREFER_TIMEOUT(-5),
    LOCALDNS_RESOLVE_FAIL(-6);

    DnsErrorCode(int value) {
        mValue = value;
    }

    public final int mValue;
}