Hello, I am trying to getDataFolder in listener class, it causes errors: Code (Text): Error occurred while enabling IPLogin v1.0 (Is it up to date?) java.lang.NullPointerException at me.l1ne.login.PLogin.<init>(PLogin.java:36) ~[?:?] at me.l1ne.login.IPLogin.onEnable(IPLogin.java:20) ~[?:?] at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321) ~[craftbukkit-1.8-R0.1-SNAPSHOT-latest.jar:git-Bukkit-33d5de3] at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:327) [craftbukkit-1.8-R0.1-SNAPSHOT-latest.jar:git-Bukkit-33d5de3] at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:404) [craftbukkit-1.8-R0.1-SNAPSHOT-latest.jar:git-Bukkit-33d5de3] at org.bukkit.craftbukkit.v1_8_R1.CraftServer.loadPlugin(CraftServer.java:341) [craftbukkit-1.8-R0.1-SNAPSHOT-latest.jar:git-Bukkit-33d5de3] at org.bukkit.craftbukkit.v1_8_R1.CraftServer.enablePlugins(CraftServer.java:313) [craftbukkit-1.8-R0.1-SNAPSHOT-latest.jar:git-Bukkit-33d5de3] at net.minecraft.server.v1_8_R1.MinecraftServer.q(MinecraftServer.java:394) [craftbukkit-1.8-R0.1-SNAPSHOT-latest.jar:git-Bukkit-33d5de3] at net.minecraft.server.v1_8_R1.MinecraftServer.k(MinecraftServer.java:362) [craftbukkit-1.8-R0.1-SNAPSHOT-latest.jar:git-Bukkit-33d5de3] at net.minecraft.server.v1_8_R1.MinecraftServer.a(MinecraftServer.java:317) [craftbukkit-1.8-R0.1-SNAPSHOT-latest.jar:git-Bukkit-33d5de3] at net.minecraft.server.v1_8_R1.DedicatedServer.init(DedicatedServer.java:190) [craftbukkit-1.8-R0.1-SNAPSHOT-latest.jar:git-Bukkit-33d5de3] at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:484) [craftbukkit-1.8-R0.1-SNAPSHOT-latest.jar:git-Bukkit-33d5de3] at java.lang.Thread.run(Unknown Source) There is 20th in IPLogin: Code (Text): pm.registerEvents(new PLogin(), this); and there is 36th in PLogin: Code (Text): File msg = new File(plg.getDataFolder() + "/messages.yml"); and plg declaration: Code (Text): private IPLogin plg; Can you help me with that plg.getDataFolder() in PLogin? Thank you very much!
Don't create a new instance of JavaPlugin. When you register events pass an instance of IPLogin to PLogin through the constructor. If you don't know what a constructor or instance is you should probably learn a bit more Java or at least look at the tutorials and learn that in about an hour. Also, if you need more help or what I said didn't work, post your code. It's pretty hard to solve the problem with 4 lines of code and an error message.
