Hello! [EDIT] Reader friendly I need help solving this error: Code: [20:45:54 WARN]: java.lang.NullPointerException [20:45:54 WARN]: at com.gramollc.dhruv.PvPPlugin.onPlayerJoin(PvPPlugin.java:178) [20:45:54 WARN]: at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [20:45:54 WARN]: at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) [20:45:54 WARN]: at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [20:45:54 WARN]: at java.lang.reflect.Method.invoke(Method.java:497) [20:45:54 WARN]: at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:300) [20:45:54 WARN]: at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) [20:45:54 WARN]: at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:501) [20:45:54 WARN]: at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:486) [20:45:54 WARN]: at net.minecraft.server.v1_8_R3.PlayerList.onPlayerJoin(PlayerList.java:282) [20:45:54 WARN]: at net.minecraft.server.v1_8_R3.PlayerList.a(PlayerList.java:142) [20:45:54 WARN]: at net.minecraft.server.v1_8_R3.LoginListener.b(LoginListener.java:115) [20:45:54 WARN]: at net.minecraft.server.v1_8_R3.LoginListener.c(LoginListener.java:53) [20:45:54 WARN]: at net.minecraft.server.v1_8_R3.NetworkManager.a(NetworkManager.java:222) [20:45:54 WARN]: at net.minecraft.server.v1_8_R3.ServerConnection.c(SourceFile:168) [20:45:54 WARN]: at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:748) [20:45:54 WARN]: at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:335) [20:45:54 WARN]: at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:632) [20:45:54 WARN]: at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:540) [20:45:54 WARN]: at java.lang.Thread.run(Thread.java:745) [20:45:54 ERROR]: Could not pass event PlayerJoinEvent to dGRAMOPPvPPlugin v1.0 org.bukkit.event.EventException at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[craftbukkit.jar:git-Bukkit-e8c6403] at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[craftbukkit.jar:git-Bukkit-e8c6403] at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:501) [craftbukkit.jar:git-Bukkit-e8c6403] at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:486) [craftbukkit.jar:git-Bukkit-e8c6403] at net.minecraft.server.v1_8_R3.PlayerList.onPlayerJoin(PlayerList.java:282) [craftbukkit.jar:git-Bukkit-e8c6403] at net.minecraft.server.v1_8_R3.PlayerList.a(PlayerList.java:142) [craftbukkit.jar:git-Bukkit-e8c6403] at net.minecraft.server.v1_8_R3.LoginListener.b(LoginListener.java:115) [craftbukkit.jar:git-Bukkit-e8c6403] at net.minecraft.server.v1_8_R3.LoginListener.c(LoginListener.java:53) [craftbukkit.jar:git-Bukkit-e8c6403] at net.minecraft.server.v1_8_R3.NetworkManager.a(NetworkManager.java:222) [craftbukkit.jar:git-Bukkit-e8c6403] at net.minecraft.server.v1_8_R3.ServerConnection.c(SourceFile:168) [craftbukkit.jar:git-Bukkit-e8c6403] at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:748) [craftbukkit.jar:git-Bukkit-e8c6403] at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:335) [craftbukkit.jar:git-Bukkit-e8c6403] at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:632) [craftbukkit.jar:git-Bukkit-e8c6403] at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:540) [craftbukkit.jar:git-Bukkit-e8c6403] at java.lang.Thread.run(Thread.java:745) [?:1.8.0_66] Caused by: java.lang.NullPointerException at com.gramollc.dhruv.PvPPlugin.onPlayerJoin(PvPPlugin.java:182) ~[?:?] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_66] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_66] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_66] at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_66] at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:300) ~[craftbukkit.jar:git-Bukkit-e8c6403] ... 14 more My on enable function: Code: @EventHandler public void onPlayerJoin(PlayerJoinEvent e) { this.logger.info("start"); if(!e.getPlayer().hasPlayedBefore()) { dataFile.set("users."+e.getPlayer().getName()+".points", "10"); try { dataFile.save(f); } catch(IOException err) { err.printStackTrace(); } } int n=1; while(n<=this.getConfig().getInt("numberOfRanks")) { if(dataFile.getConfigurationSection("users."+e.getPlayer().getName()).getInt("points")>=this.getConfig().getConfigurationSection("ranks."+n).getInt("PvPPoints")) { dataFile.set("users."+e.getPlayer().getName()+".rank", this.getConfig().getConfigurationSection("ranks."+n).getString("rankName")); } } try{ [[[LINE 178>>>]]]e.getPlayer().setDisplayName("["+this.getConfig().getConfigurationSection("ranks."+dataFile.getConfigurationSection("users."+e.getPlayer().getName()).getString("rank")).getString("rankName") +"] "+e.getPlayer().getName());//line 178 } catch(Exception err) { err.printStackTrace(); this.logger.info(this.getConfig().getConfigurationSection("ranks.1").getString("rankName")); } }
@dgramop the reason i suggested [code] blocks was because the indentation was removed, and everything had a linebreak. you didn't really change that. try recopying it from the file.
@teej107 I put a comment on that line. This line 46 Any more problems with how my code looks, please use a java beutifier yourself [merged by moderator]
This code is not readable, the problem is on line 182, but because it is so fu***d up, I don't know where that line is. If you don't want to do anything abput that, thenn I'm sorry, but no one is going to help you. Do you own the gramollc.com domain?
@dgramop Now since we know what line the problem is on, let's look up what causes a NPE. https://docs.oracle.com/javase/7/docs/api/java/lang/NullPointerException.html http://stackoverflow.com/questions/218384/what-is-a-null-pointer-exception-and-how-do-i-fix-it http://javarevisited.blogspot.com/2012/06/common-cause-of-javalangnullpointerexce.html
@mcdorli I do not own the gramollc.com domain, but I am afilliated with it's owner. I maintain that site. This http://dgramop.co is my site. I am a big web developer, I am new(ish) to bukkit plugin dev, while @teej107 I'm not THAT stupid (fair for you to think so, I phrased incorrectly, no guilt trip), understand that something up on that line is giving a null value when we need an object. The question I am asking is how it is getting there? I initialized all my vars etc. Something in either config.yml or data.yml is f'd up. Thank you all for participating in this thread! Your continued help is very much appreciated @mcdorli By the way, how did you link me to that domain? You are a talented [google] searcher! I just want to try and take things off the web that may link me to other people etc.
1.: Use reply or quotes instead of tahgs, they work better 2.: I have ny techniques. [20:45:54 WARN]: at com.gramollc.dhruv.PvPPlugin.onPlayerJoin( You know, the basic mind-reading-trough-internet. If the domains owner gave you permission, to use the domain, then I don't have any problems with that at all.
"Split the lines" -> What do you mean? you mean add a nextline like item: item: item: to item: item: item:
it's a personal preference whether to use quotes or not. I only use quotes when I am referring to a specific thing they are saying, such as in this post. They do not in fact 'work better', they send a notification, same as tagging, and in fact if I am subscribed to a thread (i.e. receiving notifications about every post), replies/quotes send me extra notifications whereas tags do not.
Tahgs don't work likebhalf of the time Quotes do. Java doesn't care about line ends, it only ends a line, if he finds a semicolon, so technically, you can do pligin. getConfig(). getString(“hello“); If you put a new line after every dot, the error will show exactly, what is null and what isn't
@mcdorli Again, I already know that java ends at the semi colon, I have lots of java (and even more C Style language and python experience. Maybe you are right, I should put nextlines so that the error will tell me where in that pile of sh~t it is. If anyone has found a different answer, please reply to this thread, other users may have similar questions, or this answer may not work
@dgramop If you don't want to spit it up then the possible things that would be null could be. The file dataFile. The config might not contain the section "ranks." + player's name. The config might not contain the section "users." + player's name. The config might not contain the string "rank" The config might not contain the string "rankName" Print them out and see what is null.
@Xerox262 You mean users.+player's name and ranks+(users.+player's name) I will try that too Keep dem posts comming!
