A gist for the rest of the readers of the thread. Code is written by yupie_123 (Bukkit fora)

Arena.java

package me.Yupie.YuPball;
 
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
 
import me.Yupie.YuPball.Teams.Team;
 
import org.bukkit.Bukkit;
import org.bukkit.Location;
import org.bukkit.World;
import org.bukkit.configuration.ConfigurationSection;
import org.bukkit.entity.Player;
 
public class Arena {
 
    public YuPball plugin;
    public static Arena a = new Arena();
    public static Arena get(){
        return a;
    }
    Random rnd = new Random();
 
 
    private List<String> allArenas = new ArrayList<String>();
 
    public List<String> getAllArenas() {
 
 
        for (String str : plugin.arenadata.getConfig().getKeys(false)) {
            allArenas.add(str);
        }
 
        return allArenas;
    }
 
    /*
    * public int getAmount(String type, String arena) { ConfigAccessor conf =
    * new ConfigAccessor(plugin, "Arenas.yml");
    *
    * ConfigurationSection section = conf.getConfig()
    * .getConfigurationSection(arena);
    *
    * if (!type.equalsIgnoreCase("red") || !type.equalsIgnoreCase("blue") ||
    * !type.equalsIgnoreCase("random") || !type.equalsIgnoreCase("center"))
    * return 0;
    *
    * type = type.toLowerCase();
    *
    * if (!section.contains(type)) return 0;
    *
    * ConfigurationSection types = conf.getConfig().getConfigurationSection(
    * arena + "." + type);
    *
    * List<String> list = new ArrayList<String>();
    *
    * for (String str : types.getKeys(false)) { list.add(str); }
    *
    * return list.size(); }
    */
    public List<Location> getAllRed(String arena) {
 
 
        ConfigurationSection section = plugin.arenadata.getConfig()
                .getConfigurationSection(arena + ".red");
 
        List<Location> list = new ArrayList<Location>();
 
        for (String str : section.getKeys(false)) {
            int x = section.getInt(str + ".x"), y = section.getInt(str + ".y"), z = section
                    .getInt(str + ".z");
            float pitch = (float) section.getDouble(str + ".pitch"), yaw = (float) section
                    .getDouble(str + ".yaw");
            World world = plugin.getServer().getWorld(
                    section.getString(str + ".world"));
 
            Location loc = new Location(world, x, y, z, yaw, pitch);
 
            list.add(loc);
        }
        return list;
    }
 
    public List<Location> getAllBlue(String arena) {
 
 
        ConfigurationSection section = plugin.arenadata.getConfig()
                .getConfigurationSection(arena + ".blue");
 
        List<Location> list = new ArrayList<Location>();
 
        for (String str : section.getKeys(false)) {
            int x = section.getInt(str + ".x"), y = section.getInt(str + ".y"), z = section
                    .getInt(str + ".z");
            float pitch = (float) section.getDouble(str + ".pitch"), yaw = (float) section
                    .getDouble(str + ".yaw");
            World world = plugin.getServer().getWorld(
                    section.getString(str + ".world"));
 
            Location loc = new Location(world, x, y, z, yaw, pitch);
 
            list.add(loc);
        }
        return list;
    }
 
    public List<Location> getAllRandom(String arena) {
 
 
        ConfigurationSection section = plugin.arenadata.getConfig()
                .getConfigurationSection(arena + ".random");
 
        List<Location> list = new ArrayList<Location>();
 
        for (String str : section.getKeys(false)) {
            int x = section.getInt(str + ".x"), y = section.getInt(str + ".y"), z = section
                    .getInt(str + ".z");
            float pitch = (float) section.getDouble(str + ".pitch"), yaw = (float) section
                    .getDouble(str + ".yaw");
            World world = plugin.getServer().getWorld(
                    section.getString(str + ".world"));
 
            Location loc = new Location(world, x, y, z, yaw, pitch);
 
            list.add(loc);
        }
        return list;
    }
 
    public void addArena(String name) {
 
        plugin.arenadata.getConfig().createSection(name);
        plugin.arenadata.saveConfig();
    }
 
    public void addRedLocation(Location loc, String arena) {
 
 
        ConfigurationSection section = plugin.arenadata.getConfig()
                .getConfigurationSection(arena);
 
        int x = loc.getBlockX(), y = loc.getBlockY(), z = loc.getBlockZ();
        double pitch = loc.getPitch(), yaw = loc.getYaw();
        String world = loc.getWorld().getName();
 
        if (!section.contains("red")) {
            section.set("red.1.x", x);
            section.set("red.1.y", y);
            section.set("red.1.z", z);
            section.set("red.1.pitch", pitch);
            section.set("red.1.yaw", yaw);
            section.set("red.1.world", world);
            plugin.arenadata.saveConfig();
        } else {
            ConfigurationSection amount = plugin.arenadata.getConfig()
                    .getConfigurationSection(arena + ".red");
            List<String> list = new ArrayList<String>();
 
            for (String str : amount.getKeys(false)) {
                list.add(str);
            }
 
            int count = list.size() + 1;
 
            section.set("red." + count + ".x", x);
            section.set("red." + count + ".y", y);
            section.set("red." + count + ".z", z);
            section.set("red." + count + ".pitch", pitch);
            section.set("red." + count + ".yaw", yaw);
            section.set("red." + count + ".world", world);
            plugin.arenadata.saveConfig();
 
        }
    }
 
    public void addBlueLocation(Location loc, String arena) {
 
 
        ConfigurationSection section = plugin.arenadata.getConfig()
                .getConfigurationSection(arena);
 
        int x = loc.getBlockX(), y = loc.getBlockY(), z = loc.getBlockZ();
        double pitch = loc.getPitch(), yaw = loc.getYaw();
        String world = loc.getWorld().getName();
 
        if (!section.contains("blue")) {
            section.set("blue.1.x", x);
            section.set("blue.1.y", y);
            section.set("blue.1.z", z);
            section.set("blue.1.pitch", pitch);
            section.set("blue.1.yaw", yaw);
            section.set("blue.1.world", world);
            plugin.arenadata.saveConfig();
        } else {
            ConfigurationSection amount = plugin.arenadata.getConfig()
                    .getConfigurationSection(arena + ".blue");
            List<String> list = new ArrayList<String>();
 
            for (String str : amount.getKeys(false)) {
                list.add(str);
            }
 
            int count = list.size() + 1;
 
            section.set("blue." + count + ".x", x);
            section.set("blue." + count + ".y", y);
            section.set("blue." + count + ".z", z);
            section.set("blue." + count + ".pitch", pitch);
            section.set("blue." + count + ".yaw", yaw);
            section.set("blue." + count + ".world", world);
            plugin.arenadata.saveConfig();
 
        }
    }
 
    public void addRandomLocation(Location loc, String arena) {
 
 
        ConfigurationSection section = plugin.arenadata.getConfig()
                .getConfigurationSection(arena);
 
        int x = loc.getBlockX(), y = loc.getBlockY(), z = loc.getBlockZ();
        double pitch = loc.getPitch(), yaw = loc.getYaw();
        String world = loc.getWorld().getName();
 
        if (!section.contains("random")) {
            section.set("random.1.x", x);
            section.set("random.1.y", y);
            section.set("random.1.z", z);
            section.set("random.1.pitch", pitch);
            section.set("random.1.yaw", yaw);
            section.set("random.1.world", world);
            plugin.arenadata.saveConfig();
        } else {
            ConfigurationSection amount = plugin.arenadata.getConfig()
                    .getConfigurationSection(arena + ".random");
            List<String> list = new ArrayList<String>();
 
            for (String str : amount.getKeys(false)) {
                list.add(str);
            }
 
            int count = list.size() + 1;
 
            section.set("random." + count + ".x", x);
            section.set("random." + count + ".y", y);
            section.set("random." + count + ".z", z);
            section.set("random." + count + ".pitch", pitch);
            section.set("random." + count + ".yaw", yaw);
            section.set("random." + count + ".world", world);
            plugin.arenadata.saveConfig();
 
        }
    }
 
 
public void setRespawnBox(Location loc, String arena){
 
    ConfigurationSection section = plugin.arenadata.getConfig()
            .getConfigurationSection(arena);
 
    int x = loc.getBlockX(), y = loc.getBlockY(), z = loc.getBlockZ();
    double pitch = loc.getPitch(), yaw = loc.getYaw();
    String world = loc.getWorld().getName();
 
    section.set("respawn.x", x);
    section.set("respawn.y", y);
    section.set("respawn.z", z);
    section.set("respawn.pitch", pitch);
    section.set("respawn.yaw", yaw);
    section.set("respawn.world", world);
    plugin.arenadata.saveConfig();
 
}
 
    public void removeLocations(String type, String arena) {
 
 
        ConfigurationSection section = plugin.arenadata.getConfig()
                .getConfigurationSection(arena);
 
        if (!type.equalsIgnoreCase("red") || !type.equalsIgnoreCase("blue")
                || !type.equalsIgnoreCase("random")
                )
            return;
 
        type = type.toLowerCase();
 
        if (!section.contains(type))
            return;
 
        section.set(type, null);
        plugin.arenadata.saveConfig();
    }
 
    public void removeArena(String arena) {
 
 
        if (!plugin.arenadata.getConfig().contains(arena))
            return;
 
        plugin.arenadata.getConfig().set(arena, null);
        plugin.arenadata.saveConfig();
    }
 
    public boolean exists(String arena) {
        if (plugin.arenadata.getConfig().contains(arena))
            return true;
        else
            return false;
    }
 
    public boolean hasRed(String arena) {
 
 
        if (plugin.arenadata.getConfig().contains(arena + ".red"))
            return true;
        else
            return false;
    }
 
    public boolean hasBlue(String arena) {
 
 
        if (plugin.arenadata.getConfig().contains(arena + ".blue"))
            return true;
        else
            return false;
    }
 
    public boolean hasRandom(String arena) {
 
 
        if (plugin.arenadata.getConfig().contains(arena + ".random"))
            return true;
        else
            return false;
    }
 
 
    public Location getRndRedLocation(String arena) {
        List<Location> allRed = getAllRed(arena);
        return allRed.get(rnd.nextInt(allRed.size()));
    }
 
    public Location getRndBlueLocation(String arena) {
        List<Location> allBlue = getAllBlue(arena);
        return allBlue.get(rnd.nextInt(allBlue.size()));
    }
 
 
    public Location getRndRandomLocation(String arena) {
        List<Location> allRandom = getAllRandom(arena);
        return allRandom.get(rnd.nextInt(allRandom.size()));
    }
 
    public Location getRespawnBox(String arena){
 
 
        ConfigurationSection section = plugin.arenadata.getConfig()
                .getConfigurationSection(arena + ".respawn");
 
        int x = section.getInt("x"), y = section.getInt("y"),z = section.getInt("z");
        float yaw = (float) section.getDouble("yaw"), pitch = (float) section.getDouble("pitch");
        World world = Bukkit.getWorld(section.getString("world"));
 
        return new Location(world,x,y,z,yaw,pitch);
    }
 
 
    public void sendToArena(Player p){
 
        String arena = ArenaVoting.get().CurrentArena;
 
 
        if(plugin.queued.containsKey(p.getUniqueId())){
            Kits.get().giveKit(p, Kits.get().getKit(p));
            if(GameStateUtil.get().getCurrentGame() == GameState.TDM || GameStateUtil.get().getCurrentGame() == GameState.FT500){
                p.teleport(getRndRandomLocation(arena));
            }else{
            if(Teams.get().getTeam(p) == Team.RED){
                p.teleport(getRndRedLocation(arena));
            }else{
                p.teleport(getRndBlueLocation(arena));
            }
            }
 
            if(Teams.get().getTeam(p) == Team.RED){
                plugin.amountOfRedPlayers++;
            }else{
                plugin.amountOfBluePlayers++;
            }
 
            plugin.addSpawnProtection(p);
        }
    }
 
    public void setLobby(Location loc){
 
 
        plugin.arenadata.getConfig().set("Lobby.x", loc.getBlockX());
        plugin.arenadata.getConfig().set("Lobby.y", loc.getBlockY());
        plugin.arenadata.getConfig().set("Lobby.z", loc.getBlockZ());
        plugin.arenadata.getConfig().set("Lobby.yaw", loc.getYaw());
        plugin.arenadata.getConfig().set("Lobby.pitch", loc.getPitch());
        plugin.arenadata.getConfig().set("Lobby.world", loc.getWorld().toString());
 
        plugin.arenadata.saveConfig();
 
    }
 
    public Location getLobby(){
 
 
        int x = plugin.arenadata.getConfig().getInt("Lobby.x"), y = plugin.arenadata.getConfig().getInt("Lobby.y"), z = plugin.arenadata.getConfig().getInt("Lobby.z");
        float yaw = (float) plugin.arenadata.getConfig().getDouble("Lobby.yaw"), pitch = (float) plugin.arenadata.getConfig().getDouble("Lobby.pitch");
        World world = plugin.getServer().getWorld(plugin.arenadata.getConfig().getString("Lobby.world"));
 
        return new Location(world,x,y,z,yaw,pitch);
    }
 
}