Get name of player by UUID

String Members="";
ArrayList<String> members=Worldguard.RegionMembers.get(args[1]);
for(int i=0;i<members.size();i++) {
Player target=Bukkit.getPlayer(members.get(i));
Members=(Members+"§a, §2"+target.getName());
}
StringBuilder sb = new StringBuilder(Members);
sb.replace(0, 2, "");
Members = sb.toString();
p.sendMessage("§eMembers: "+Members);
}

I tried to output a list of all playernames in this arraylist.
The arraylist contains Strings of PlayerUUIDs.
But I allways get an Null Error on Line 5.

Servererror:http://prntscr.com/jy2w68

 

if someone knows how to avoid this error.

 

Code:

Bukkit.getPlayer(uuid).getDisplayName();

 

@Kicksy
Take that line and change "getPlayer" to "getOfflinePlayer"