For a plugin im making I need to implement exp points so you get a certain amount per kill, im my case 50. Then I need to get the amount of exp that they have got with the command /stats and if they have a certain amount, they can rank up to their next rank. (Corporal, Sergeant, ect...) I am trying to this with HashMap<String, Integer> the string being the player and the Integer being the exp. Can someone help me out with doing this, especially getting the amount of exp they have. Thanks
Loog If you only want to count player deaths, Code: HashMap<String,Integer> exp = new HashMap<String,Integer>(); @EventHandler public void onDeath(PlayerDeathEvent event) { if (event.getPlayer().getKiller() != null) { Player killer = event.getPlayer().getKiller(); exp.put(killer.getName(), exp.containsKey(killer.getName()) ? exp.get(killer.getName()) + 1 : 1); if (exp.get(killer.getName()) == 50) { //rank up exp.put(killer.getName(), 0); //reset exp } } } To get a value from the hashmap, use Code: Object o = hashmap.get(object); To add a value to the hashmap, use: Code: hashmap.put(key, value); To check if a hashmap contains a key (entry), use: Code: if (hashmap.containsKey(object))
I'm sorry i'm still very confused, ill post the code im using with the exp. Listener: Code: public static HashMap<String, Integer> exp = new HashMap<String, Integer>(); int i = 50; @EventHandler public void PlayerDeath(PlayerDeathEvent event) { Player player = event.getEntity(); Player killer = player.getKiller(); Game.human.remove(player.getDisplayName()); Game.infected.add(player.getDisplayName()); exp.put(killer.getName(), exp.get(killer.getName()) + i); } } The class which needs to get the exp Code: if(commandLabel.equalsIgnoreCase("stats")) { Object o = GameListener.exp.get(o); sender.sendMessage(ChatColor.RED + sender.getName() + "'s" + ChatColor.YELLOW + " stats:"); sender.sendMessage(ChatColor.RED + GET EXP HERE); return true;
Loog One thing to be careful of: when you get the killer's value in the exp.put() statement, there's a chance that the killer is not in there yet so you have to check first with the contains() method. Code: public static HashMap<String, Integer> exp = new HashMap<String, Integer>(); int i = 50; @EventHandler public void PlayerDeath(PlayerDeathEvent event) { Player player = event.getEntity(); Player killer = player.getKiller(); Game.human.remove(player.getDisplayName()); Game.infected.add(player.getDisplayName()); exp.put(killer.getName(), exp.containsKey(killer.getName()) ? exp.get(killer.getName()) + 1 : 1); //this is basically a condensed version of saying if hashmap does not have the killer, initialize the killer in the hashmap } } Code: if(commandLabel.equalsIgnoreCase("stats")) { Object o = GameListener.exp.get(o); sender.sendMessage(ChatColor.RED + sender.getName() + "'s" + ChatColor.YELLOW + " stats:"); sender.sendMessage(ChatColor.RED + "Sender has " + (classwithhashmap.exp.contains(sender.getName()) ? classwithhashmap.exp.get(sender.getName()) : "no") + " kill(s)."); //again, checking if sender is in hashmap before getting the value to avoid errors return true;
I have an error on the highlighted word sender.sendMessage(ChatColor.RED + "Sender has " + (classwithhashmap.exp.contains(sender.getName()) ? classwithhashmap.exp.get(sender.getName()) : "no") + " kill(s)."); It gives me the options - 'Change to containsKey(..)', 'Change to containsValue(..)' and 'Add cast to GameListener.exp' What should I do?
Okay, so the exp clears on server reload/stop. how can I stop this? And also, np EDIT by Moderator: merged posts, please use the edit button instead of double posting.
Loog You'd have to save to an external file. I posted a way to do this here: forums.bukkit.org/threads/solved-storing-and-loading-from-a-hashmap.88588 Just scroll down until you see my post.
r0306 Okay, I shall have a look. r0306 I have found you post, do I make the new methods in a new class? Or in the same class. Could you give me an example? EDIT by Moderator: merged posts, please use the edit button instead of double posting.
Loog Copy and paste the two methods into your main class. Then change the <String, String> to <String, Integer> for every one of them. Now, change the directory of file for both methods to Code: getDataFolder() + "\\exp.bin" Then add the load hashmap to your onEnable() and the save hashmap to your onDisable(). Code: public void onEnable() { classwithhashmap.exp = loadHashMap(); } public void onDisable() { saveHashMap(classwithhashmap.exp); }
Code: public void saveHashMap(HashMap<String, Integer> map) { FileWriter fwriter = new FileWriter("\\plugins\\MCInfected.bin"); ObjectOutputStream writer = new ObjectOutputStream(fwriter); writer.writeObject(map); writer.close(); //don't forget to close the writer } public HashMap<String, Integer> loadHashMap() { HashMap<String, Integer> map = new HashMap<String, Integer>(); FileReader freader = new FileReader("\\plugins\\MCInfected.bin"); ObjectInputStream reader = new ObjectInputStream(freader); map = (HashMap<String, Integer>) reader.readObject(); reader.close(); //don't forget to close return map; } } I have an error for both methods on new ObjectInputStream(freader); and it gives me the options Remove argument to match 'ObjectInputStream()' and 'change type of freader to InputStream' I also have the yellow line under the loadHashMap method in the map = (HashMap<String, Integer>) reader.readObject(); it gives me the option 'Add @SuppressWarnings unchecked to loadHashMap()' Any idea of how to fix this?
Loog Try changing fwriter to Code: FileOutputStream fwriter = new FileOutputStream("\\plugins\\MCInfected.bin"); And click add suppress warnings. It's only for the compiler nothing else.
r0306 That seems to have fixed the saveHashMap method but I still have an error on loadHashMap() in the ObjectInputStream reader = new ObjectInputStream(freader);
Loog Same as the writer, change freader to Code: FileInputStream freader = new FileInputStream("\\plugins\\MCInfected.bin");
r0306 Okay, that fixed that but now many parts of the method become underlined in red, the options are Add throws declaration and Surround with try/catch
Okay, that removed all errors, now for me to try it out. It gives me console errors, and also doesn't save the exp. The console errors. 14:52:20 [INFO] [MCInfected] Enabling MCInfected v1.1 14:52:20 [INFO] MCInfected version 1.1 has been enabled 14:52:20 [SEVERE] java.io.FileNotFoundException: plugins\MCInfected\plugins\MCIn fected\exp.txt (The system cannot find the path specified) 14:52:20 [SEVERE] at java.io.FileInputStream.open(Native Method) 14:52:20 [SEVERE] at java.io.FileInputStream.<init>(Unknown Source) 14:52:20 [SEVERE] at java.io.FileInputStream.<init>(Unknown Source) 14:52:20 [SEVERE] at me.loogeh.mcinfected.MCInfected.loadHashMap(MCInfecte d.java:135) 14:52:20 [SEVERE] at me.loogeh.mcinfected.MCInfected.onEnable(MCInfected.j ava:53) 14:52:20 [SEVERE] at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlug in.java:217) 14:52:20 [SEVERE] at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin( JavaPluginLoader.java:337) 14:52:20 [SEVERE] at org.bukkit.plugin.SimplePluginManager.enablePlugin(Si mplePluginManager.java:381) 14:52:20 [SEVERE] at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftSe rver.java:257) 14:52:20 [SEVERE] at org.bukkit.craftbukkit.CraftServer.enablePlugins(Craf tServer.java:239) 14:52:20 [SEVERE] at net.minecraft.server.MinecraftServer.t(MinecraftServe r.java:373) 14:52:20 [SEVERE] at net.minecraft.server.MinecraftServer.a(MinecraftServe r.java:360) 14:52:20 [SEVERE] at net.minecraft.server.MinecraftServer.init(MinecraftSe rver.java:189) 14:52:20 [SEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftSer ver.java:424) 14:52:20 [SEVERE] at net.minecraft.server.ThreadServerApplication.run(Sour ceFile:492) 14:52:20 [INFO] [TempBan] Enabling TempBan v1.2 14:52:20 [INFO] [MobDisguise] Enabling MobDisguise v1.81 14:52:20 [INFO] [MobDisguise] by desmin88 version 1.81 enabled. 14:52:20 [INFO] [Buycraft] Enabling Buycraft v4.5 14:52:21 [INFO] [Buycraft] Loaded 1 package(s) into the cache. 14:52:21 [INFO] [Buycraft] Plugin has been successfully enabled. 14:52:21 [INFO] Server permissions file permissions.yml is empty, ignoring it 14:52:21 [INFO] Done (2.365s)! For help, type "help" or "?" 14:52:21 [INFO] /192.168.1.3:55406 lost connection 14:52:29 [INFO] /192.168.1.3:55418 lost connection 14:52:35 [INFO] /192.168.1.3:55423 lost connection 14:52:39 [WARNING] Can't keep up! Did the system time change, or is the server o verloaded? 14:52:41 [INFO] /192.168.1.3:55431 lost connection 14:52:46 [INFO] _Portal [/118.210.246.154:55436] logged in with entity id 207 at ([world] 708.5943435839757, 67.0, 80.30000001192093) 14:52:46 [SEVERE] Could not pass event PlayerJoinEvent to MCInfected org.bukkit.event.EventException at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja va:304) at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav a:62) at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.j ava:477) at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j ava:462) at net.minecraft.server.ServerConfigurationManager.c(ServerConfiguration Manager.java:134) at net.minecraft.server.NetLoginHandler.b(NetLoginHandler.java:129) at net.minecraft.server.NetLoginHandler.a(NetLoginHandler.java:94) at net.minecraft.server.Packet1Login.handle(SourceFile:68) at net.minecraft.server.NetworkManager.b(NetworkManager.java:246) at net.minecraft.server.NetLoginHandler.a(NetLoginHandler.java:42) at net.minecraft.server.NetworkListenThread.a(NetworkListenThread.java:6 5) at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:559) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:451) at net.minecraft.server.ThreadServerApplication.run(SourceFile:492) Caused by: java.lang.NullPointerException at me.loogeh.mcinfected.PlayerListener.onPlayerJoin(PlayerListener.java: 31) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja va:302) ... 13 more 14:52:47 [INFO] [Spout] Successfully authenticated _Portal's Spoutcraft client. Running client version: 1548 14:52:50 [INFO] /192.168.1.3:55440 lost connection 14:53:14 [INFO] Loogeh [/118.210.246.154:55458] logged in with entity id 6407 at ([world] 702.8391139263421, 71.0, 80.80160676760609) > Okay, I fixed the first set of errors, but I have no idea what is going on in the second part... dw, the errors fixed themselves... Thank you sooo much! You're going on the contributors list. EDIT by Moderator: merged posts, please use the edit button instead of double posting.
Np. Lol. Oh. You might wanna add this to fix the errors on the first time: Code: public HashMap<String, Integer> loadHashMap() { HashMap<String, Integer> map = new HashMap<String, Integer>(); FileReader freader = new FileReader("\\plugins\\MCInfected.bin"); ObjectInputStream reader = new ObjectInputStream(freader); if(reader.available() > 0) { map = (HashMap<String, Integer>) reader.readObject(); } reader.close(); //don't forget to close return map; } And also, Code: public void saveHashMap(HashMap<String, Integer> map) { File file = new File("\\plugins\\MCInfected.bin"); if (!file.exists()) { getDataFolder().mkdirs(); file.createNewFile(); } FileWriter fwriter = new FileWriter("\\plugins\\MCInfected.bin"); ObjectOutputStream writer = new ObjectOutputStream(fwriter); writer.writeObject(map); writer.close(); //don't forget to close the writer }
