Solved Get 25% of all online players

What I am trying to do is calculate 25% of all of the online players, or players in a list, and store those players into an arraylist. I have had countless fails, and now it is time to ask..

How would one get 25% of the players on the server, or rather in a list?

 

The question isn't how but which 25% would you want to get?

 

To get the # how many those 25% are you prolly can do

Bukkit.getServer().getOnlinePlayers().length() / 4; this should give you the ammount of 25% of players as an integer.. Maybe you can work it from there

Edit: Oh and what 1Rogue said ofc.

 

Code:java

 Player[] onlinePlayers = getServer().getOnlinePlayers();
int quarterOfPlayersAmount = onlinePlayers.length / 4;
 
ArrayList<String> playerNames = new ArrayList<String>();
for(Player player : onlinePlayers)
playerNames.add(player.getName());
 
Collections.shuffle(playerNames);
 
ArrayList<String> shortenedPlayerList = new ArrayList<String>();
for(int i = 0; i < quarterOfPlayersAmount ; i++)
shortenedPlayerList.add(playerNames.get(i));
 

 

Assuming you want a random quarter of the players..

Code:JAVA

 
int chosen = 0;
int required = Bukkit.getServer().getOnlinePlayers().length / 4;
List<String> players = new List<String>();
Random r = new Random();
while(chosen < required) {
int pick = r.nextInt(Bukkit.getServer().getOnlinePlayers().length);
String s = Bukkit.getServer().getOnlinePlayers()[pick].getName();
while(players.contains(s) == true) {
pick = r.nextInt(Bukkit.getServer().getOnlinePlayers().length);
s = Bukkit.getServer().getOnlinePlayers()[pick].getName();
}
chosen++;
players.add(s);
}
 

 

That would cause repeated values, if you want random, it would be much simpler to:

Code:java

public List<String> getQuarter() {
    ArrayList<Player> players = Arrays.asList(Bukkit.getServer().getOnlinePlayers());
    List<String> back = new ArrayList();
    Collections.shuffle(players);
    for (int i = 0; i < players.size() / 4; i++) {
        back.add(players.get(i).getName());
    }
    return back;
}

 

How would it cause repeated values?
1Rogue

 

This is probably the simplest way in regards to the shortest amount of code

Code:java

 
ArrayList<Player> list = new ArrayList<Player>(Bukkit.getServer().getOnlinePlayers());
 
Collections.shuffle(list); // Omit this if you don't want randomization
 
ArrayList<Player> quarterOfPlayers = new ArrayList<Player>(list.subList(0, (int) (list.size() / 4)));
 

 

Ah, my mistake, I didn't quite read through the entirety of the code. However, that code is still very resource-intensive (and considering it is random, it has the potential to take an unlimited amount of time).

Yup, subList was that method I couldn't find earlier.

 

I'm not highly sure if these work, because I am testing with only two players, while there are less than 4, I need to be able to get one of the 1/1, 1/2, or 1/3 players that are currently online. Is there a method or conversion from the current ones given that will enable this feature, because as far as I know it doesn't work with < 4 players.

 

So then add a check if there are less than four players, and then if there are just select a random one.

 

This topic is halfway resolved, if I need more help when I can get 4+ of my friends to test this and if it doesn't work I will reply.