Solved HashSet Question

How would I go about picking a random player from a hashset? I have looked all over for an example but I could not find one that really helped.

Thank you,
God bless.

 

I do it like this:

Code:java

List<Player> playerList = new ArrayList<Player>(yourHashSet);
Collections.shuffle(playerList);
Player randomPlayer = playerList.get(0);

There may be better methods, but I got used to this one.

You could also use:

Code:java

List<Player> playerList = new ArrayList<Player>(yourHashSet);
 
Player randomPlayer = playerList.get(new Random().nextInt(playerList.size()));

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Throwing me errors under
List:
The type List is not generic; it cannot be parameterized with arguments <Player>

new ArrayList<Player>(pl.inLobby);
The constructor ArrayList<Player>(Set<String>) is undefined

 

Hellsing

I don't know how efficient shuffle is, but it looks better than what I do.

Code:

public Player randomPlayer(List<String>list){
     int select = new Random().nextInt(list.size());
     Player p = Bukkit.getServer().getPlayer(list[select]);
     return p;
}

You should never store a Player object.

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Doing it for both methods

Solved thanks
TheGreenGamerHD Hellsing

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Also perhaps not use a HashSet, it depends on wut you are using it for.

 

Ermmm.... One more question:

Now how do I get the other players that were not chosen at random?

So

Player1 -> Taken out of of hashset

Player2
& -> Still remain
Player3

How would I go and get Player2 & Player3?

Thanks

 

remove the chosen Player, then the collection will hold all of the not chosen players.

 

Oops forgot to mention I figured it out.

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