Array list remove error

This show me error.

For example

Code:

public static List<String> mgSigns = new ArrayList<String>();

Code:

if(cfg.mgSigns.contains(list)){
  cfg.mgSigns.remove(list);  //<-----------    Correcty this show me error, not slashes, but command!
}

 

kulersh what is the error?

 

Code:java

public static List<String> mgSigns = new ArrayList<String>();

Needs to be:

Code:java

public ArrayList<String> mgSigns = new ArrayList<String>();

 

Wrong.

 

You say wrong but don't provide a reason, you're not helping anyone, so if you can't say why then please, don't say I'm wrong.


EDIT: Also, OP. Can you show us your "list" variable. I'm assuming it's a list. So for that you need to go through a For loop.

Code:java

for(String s : list){
 
    cfg.mgSigns.remove(s);
 
}

 

Mersenne Twister hatstand since he did not provide an error I assume he did:
Player player = blablabla;
When it needs to be:
String player = blablabla;

 

ArrayList implements the List interface, therefore you can assign an ArrayList to a List variable. Using the specific list implementation as the variable type provides zero benefit, and won't fix his problem.

If I had to guess, his error is because contains() takes an Object, whilst remove() takes (in this case) a String. If his list variable is a list, he wants to be using containsAll() and removeAll(). So while your loop would work, there are already methods to do that for you.

 

i still have error but i dont know why

Code:

22.08 19:01:46 [Server] INFO at net.minecraft.server.v1_6_R2.ThreadServerApplication.run(SourceFile:582)
22.08 19:01:46 [Server] INFO at net.minecraft.server.v1_6_R2.MinecraftServer.run(MinecraftServer.java:419)
22.08 19:01:46 [Server] INFO at net.minecraft.server.v1_6_R2.MinecraftServer.s(MinecraftServer.java:486)
22.08 19:01:46 [Server] INFO at net.minecraft.server.v1_6_R2.DedicatedServer.t(DedicatedServer.java:226)
22.08 19:01:46 [Server] INFO at net.minecraft.server.v1_6_R2.MinecraftServer.t(MinecraftServer.java:522)
22.08 19:01:46 [Server] INFO at org.bukkit.craftbukkit.v1_6_R2.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:345)
22.08 19:01:46 [Server] INFO at org.bukkit.craftbukkit.v1_6_R2.scheduler.CraftTask.run(CraftTask.java:53)
22.08 19:01:46 [Server] INFO at me.kulers.multigame.main.main$1.run(main.java:213)
22.08 19:01:46 [Server] INFO at me.kulers.multigame.bowspleef.main.startGameIfEnaughtPlayers(main.java:324)
22.08 19:01:46 [Server] INFO at java.util.HashMap$KeyIterator.next(HashMap.java:874)
22.08 19:01:46 [Server] INFO at java.util.HashMap$HashIterator.nextEntry(HashMap.java:839)
22.08 19:01:46 [Server] INFO java.util.ConcurrentModificationException
22.08 19:01:46 [Server] WARNING Task #91 for MultiGame v1.0 generated an exception

Fixed: ap needed to change to HashMap