Basically, when I try to get a UUID from the YML file and convert it to a UUID, which further converts to an offline player, it returns an NPE. I printed out the UUID of the offline player I'm trying to convert to, and it prints the exact thing in the YML. Code (Text): public Faction(String name) { ff = new File("plugins/SysFactions/factions/" + name + ".yml"); yml = YamlConfiguration.loadConfiguration(ff); NAME = name; System.out.println(yml.getString("creator")); owner = Bukkit.getOfflinePlayer(UUID.fromString(yml.getString("creator"))); level = (float) yml.getDouble("level"); playercount = yml.getInt("playercount"); List<String> ymlplayersraw = yml.getStringList("players"); ymlplayersraw.stream().forEach(p -> { players.add(Bukkit.getOfflinePlayer(UUID.fromString(p))); }); if (level >= 5 && yml.getBoolean("home.set")) { home = new Location(Bukkit.getWorld(yml.getString("home.W")), yml.getDouble("home.X"), yml.getDouble("home.Y"), yml.getDouble("home.Z")); } else { home = null; } } Code (Text): [00:18:33 ERROR]: Error occurred while enabling SysFactions v1.0.0 (Is it up to date?) java.lang.NullPointerException at java.base/java.util.UUID.fromString(UUID.java:197) ~[?:?] at github.notjacobdev.methods.Faction.<init>(Faction.java:77) ~[?:?] at github.notjacobdev.handlers.FactionHandler.registerAll(FactionHandler.java:24) ~[?:?] at github.notjacobdev.main.FactionsMain.onEnable(FactionsMain.java:38) ~[?:?] at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321) ~[spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:340) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugin(CraftServer.java:357) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.craftbukkit.v1_8_R3.CraftServer.enablePlugins(CraftServer.java:317) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.craftbukkit.v1_8_R3.CraftServer.reload(CraftServer.java:741) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.Bukkit.reload(Bukkit.java:535) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:25) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:641) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24] at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchServerCommand(CraftServer.java:627) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.DedicatedServer.aO(DedicatedServer.java:412) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:375) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24] at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24] at java.base/java.lang.Thread.run(Thread.java:830) [?:?] Code (Text): name: testfac creator: b35754a989d146b9b2c3c87902ce22f5 level: 0.0 playercount: 1 players: - dripswag home: W: '0' X: 0.0 Y: 0.0 Z: 0.0 set: false Any thoughts?
Code (Text): yml.addDefault("creator", creator.getPlayer().getUniqueId().toString().replace("-", ""));
Deleted the replace and also changed it to Player instead of OfflinePlayer, still getting the same error the entire class if it matters: https://pastebin.com/cEsXaSUJ also the registration method: https://pastebin.com/wheEh0vn
What this says: Is that there was an NPE within the method. Chances are you passed null to it. There likely isn't a creator path in the config. You can add a debug message to print out what yml.getString("creator") returns. EDIT: Just because you add a default for creator once, doesn't mean it'll magically appear the next time you load the file. The YAML parser can only read what's written in the file. It cannot read your mind. If you want the creator to be saved to the file, you need to set the value. You can set the default if you wish, but you'd need to keep track of the defaults somewhere else, separately, and set it each time a config is loaded.
I did that and it changed nothing Code (Text): File fff = new File("plugins/SysFactions/factions/a.yml"); YamlConfiguration yml = YamlConfiguration.loadConfiguration(fff); System.out.println(yml.getString("creator")); [23:21:02 INFO]: b35754a9-89d1-46b9-b2c3-c87902ce22f5 I printed it and it returned the UUID as a string, no null errors there Also tried setting the yml as you said and it didn't change anything as far as I can tell at this point, I'm probably just going to try a different approach to loading in the player, but thank you guys for your help
You may have solved it, will test when I get home EDIT: nope, changing it to Bukkit#getOfflinePlayer returns the same error
Again, read the stacktrace. The NPE is within UUID#fromString. So the issue is with what you passed to that method. As for setting the value, you also need to save the config using FileConfiguration#save.
