java - NullPointerException thrown after field is check if it is null

Question

I am developing a plugin for Bukkit (http://bukkit.org) and after verifying that it is not null, it gives me a NullPointerException at the 2nd line

    String description = getConfig().getString("core.commands."+cmd+".description");
    if (!(description.isEmpty()))
          getCommand(cmd).setDescription(description);
    else 
          getLogger().warning("NO description assigned to: " + cmd);
    description = null;

Answer 1

isEmpty() is different from null check. isEmpty() checks is String is empty String (which means "").

You need to do something like

if (description != null && !description.isEmpty())