import com.sun.jna.platform.win32.Advapi32Util;
import com.sun.jna.platform.win32.Netapi32Util;
import com.sun.jna.platform.win32.Netapi32Util.Group;

    // http://github.com/twall/jna#readme
    //    you need 2 jars : jna-3.5.1.jar and platform-3.5.1.jar


     Group[] groups = Netapi32Util.getUserGroups(Advapi32Util.getUserName(), Netapi32Util.getDCName());
     for (Group group:groups) {
        System.out.println(group.name);
     }

import com.sun.jna.platform.win32.Netapi32Util;
import com.sun.jna.platform.win32.Netapi32Util.Group;
...

    // http://github.com/twall/jna#readme
    //    you need 2 jars : jna-3.5.1.jar and platform-3.5.1.jar

     Group[] groups = Netapi32Util.getUserGroups("username", Netapi32Util.getDCName());
     for (Group group:groups) {
        System.out.println(group.name);
     }

   public static boolean isUserInRole(String user, String role) {
        try {
            Group[] groups = Netapi32Util.getUserGroups(user, Netapi32Util.getDCName());
            boolean isAuthorized = false;
            for (Group group:groups) {
                 if (group.name.equals(role)) {
                     isAuthorized = true;
                     break;
                 }
            }
            return isAuthorized;
        }
        catch (Exception e) {
            return false;
        }
    }