Cannot resolve symbol IPAddressUtil

Question

I have a problem in my android studio(macosx) : in InetAddress.java some import have problem

import sun.net.util.IPAddressUtil;

import android.system.GaiException;

import android.system.StructAddrinfo;

import libcore.io.Libcore;

editor says

cannot resolve symbol IPAddressUtil

Answer 1

I think those classes are not in Android SDK (IpAddressUtil, Libcore). Also, it is discouraged to use classes from sun.* package in your programs.