Plugin Help How do I randomly get something from the config

Hey, So I'm a somewhat new plugin developer (Started 2 months ago) and now that I know a lot of things, I want to create a small mini-game. I need help with one thing though, In most mini-games (Survival games, Skywars, paintball, etc), Your spawns are on your teams side though they are random (You don't spawn on the exact same block everytime). I know how to make a command to create & save the spawnpoints to the config but how do you make it randomly choose a spawnpoint from the config and use it?

Sorry if this is a bit confusing​

 

@ObviousEmeralds
1. Store each spawn with a number key ("1", "2", etc).
2. Pick a random number within the range of the number of spawns.
3. Get the spawn with that number as the key.
4. Do whatever you want with that spawn.

 

@Mrs. bwfctower How to you store it with a number key?

 

@ObviousEmeralds

Code:

spawns:
  1:
    <location stuff>
  2:
    <location>
  3:
    <etc>

 

@Mrs. bwfctower Any way to make it do that automaticly with a command?

 

@ObviousEmeralds Create a setLocation method that takes an int and Location, and sets "spawns." + id to each of the location's values (world, x, y, z, yaw, pitch).

 

@Mrs. bwfctower
Could you give an example of a code?

 

@ObviousEmeralds Try something. If it works, great, mark this thread as solved. If it doesn't work then post what you tried, and we'll provide you with assistance. We don't spoonfeed here, so don't ask for it.

 

@Mrs. bwfctower
My code to get the location is this:

Code:

            if(args[0].equalsIgnoreCase("test")){
                Random r = new Random();
                World w = p.getWorld();
                double loc1 = (double) getConfig().get("Spawnpoint.red.", r.nextInt(10+1));
            p.teleport( new Location(w, loc1 ,loc1 ,loc1 ));
            }

And my config looks like:

Code:

Spawnpoint:
  red:
    '1':
      x: -661.7498697110026
      y: 70.0
      z: -20.31236779866728
      yaw: -331.4602355957031
      pitch: 22.35028839111328
    '2':
      x: -663.4531407048074
      y: 70.0
      z: -17.1758408637189
      yaw: -331.4602355957031
      pitch: 22.35028839111328
    '3':
      x: -665.3915705203572
      y: 70.0
      z: -13.612000976717535
      yaw: -331.4602355957031
      pitch: 22.35028839111328
    '4':
      x: -668.6757594051891
      y: 70.0
      z: -7.567237830139611
      yaw: -331.4602355957031
      pitch: 22.35028839111328
    '5':
      x: -669.2968208319704
      y: 70.0
      z: -3.7935500910095534
      yaw: -331.4602355957031
      pitch: 22.35028839111328
    '6':
      x: -669.0265312637869
      y: 70.0
      z: 0.1288653930370844
      yaw: -331.4602355957031
      pitch: 22.35028839111328
    '7':
      x: -670.6359549242227
      y: 70.0
      z: 3.087821152468579
      yaw: -331.4602355957031
      pitch: 22.35028839111328
    '8':
      x: -672.47851390825
      y: 69.0
      z: 6.48074636688971
      yaw: -331.4602355957031
      pitch: 22.35028839111328
    '9':
      x: -674.1004515667339
      y: 69.0
      z: 9.469051120387414
      yaw: -331.4602355957031
      pitch: 22.35028839111328
    '10':
      x: -673.848219715307
      y: 70.0
      z: 12.961662687570755
      yaw: -331.4602355957031
      pitch: 22.35028839111328

My stack trace is:

Code:

null
org.bukkit.command.CommandException: Unhandled exception executing command 'pvp' in plugin PvP v1.0
    at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[craftbukkit.jar:git-Bukkit-18fbb24]
    at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140) ~[craftbukkit.jar:git-Bukkit-18fbb24]
    at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:620) ~[craftbukkit.jar:git-Bukkit-18fbb24]
    at net.minecraft.server.v1_8_R3.PlayerConnection.handleCommand(PlayerConnection.java:1106) [craftbukkit.jar:git-Bukkit-18fbb24]
    at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:966) [craftbukkit.jar:git-Bukkit-18fbb24]
    at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(SourceFile:37) [craftbukkit.jar:git-Bukkit-18fbb24]
    at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(SourceFile:9) [craftbukkit.jar:git-Bukkit-18fbb24]
    at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [craftbukkit.jar:git-Bukkit-18fbb24]
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_60]
    at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_60]
    at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [craftbukkit.jar:git-Bukkit-18fbb24]
    at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:673) [craftbukkit.jar:git-Bukkit-18fbb24]
    at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:335) [craftbukkit.jar:git-Bukkit-18fbb24]
    at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:629) [craftbukkit.jar:git-Bukkit-18fbb24]
    at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:537) [craftbukkit.jar:git-Bukkit-18fbb24]
    at java.lang.Thread.run(Unknown Source) [?:1.8.0_60]
Caused by: java.lang.ClassCastException: org.bukkit.configuration.MemorySection cannot be cast to java.lang.Double
    at me.ObviousEmeralds.Pvp.MainClass.onCommand(MainClass.java:134) ~[?:?]
    at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[craftbukkit.jar:git-Bukkit-18fbb24]
    ... 15 more
[17:02:10]

(The "Caused by" part of the stack trace)

Code:

Caused by: java.lang.ClassCastException: org.bukkit.configuration.MemorySection cannot be cast to java.lang.Double
    at me.ObviousEmeralds.Pvp.MainClass.onCommand(MainClass.java:134) ~[?:?]

Line 134 is

Code:

  double loc1 = (double) getConfig().get("Spawnpoint.red.", r.nextInt(10+1));

 

@ObviousEmeralds Did you read the stacktrace message?

 

@teej107 Yes, I just don't know how to fix it

 

http://lmgtfy.com/?q=java+classcastexception

 

@Mrs. bwfctower After a few days, I finally figured out the code