Java问题，为什么我在使用invoke命令时遇到了一个非法的问题？

本文介绍了Java问题，为什么我在使用invoke命令时遇到了一个非法的问题？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 我正在为在我的服务器上播放的朋友写一个Spigot Dr Who Tardis插件。 当我执行命令/ tardis help时，命令执行成功。但是当我执行命令/ tardis createcamouflage 735 66 -1352 739 68 -1356时，我得到一个IllegalArgumentException：参数类型不匹配。 最大的问题.. 。为什么第79行的测试返回真的?????? 我在第79和84行标注了评论。 以下是代码： public class CommandHandler { 插件插件; TardisListener tardisListener; public CommandHandler（插件实例）{ 此 .plugin =实例; 此 .tardisListener = new TardisListener（ this .plugin）; } 字符串 [] commands1 = { help， create ， save }; 字符串 [] methods1 = { giveHelp， createBox， saveBoxes }; 字符串 [] commands2 = { createcamouflage}; String [] methods2 = { createTemplate }; HashMap< String，Method> actions = new HashMap< String，Method>（）; HashMap< String，Method> actions1 = new HashMap< String，Method>（）; HashMap< String，Method> actions2 = new HashMap< String，Method>（）; private HashMap< String，Method> dictionary（ String []命令， String [] methods）{ for （ int i = 0; i< commands.length; i ++）{ Method m [] = 此 .getClass（）getDeclaredMethods（）; 尝试 { for （ int c = 0 ; c< m.length; c ++）{ if （m [c] .getName（）。equalsIgnoreCase（methods [i]））{ this .actions.put（commands [i]，米并[c]）; } } } catch （SecurityException e）{ / / TODO自动生成的捕获块 e.printStackTrace（）; } } 返回行动; } public boolean executeCommand（CommandSender sender，Command cmd ，字符串标签，字符串 [] args）{ if （sender instanceof Player）{ Player player =（Player）sender; player.sendMessage（ 收到的命令）; } else { System.out.println（ Tardis：Command Received）; } if （cmd.getName（）。equalsIgnoreCase（ tardis））{ // 如果播放器键入/ tardis然后执行以下操作... 如果（args.length！= 0 ）{ String arg = args [ 0 ]。 toLowerCase（）; System.out.println（ Tardis：Building Dictionary）; actions1 = dictionary（commands1，methods1）; actions2 = dictionary（commands2，methods2）; System.out.println（ Tardis：启动第一阶段多态性）; 方法方法; 尝试 { for （ String key：actions1.keySet（））{ if （key.equalsIgnoreCase（arg））{ // 第79行，为什么要返回true？！ System.out.println（ Tardis：第一阶段多态执行）; CommandHandler handler = new CommandHandler（plugin）; method = actions1.get（arg）; Object [] obj = {sender}; method.invoke（handler，obj）; // 第84行，为什么要调用它？ 返回 true; } } System.out.println（ Tardis：开始第二阶段多态性）; for （ String key：actions2.keySet（））{ if （key.equalsIgnoreCase（arg））{ CommandHandler handler = new CommandHandler（plugin）; method = actions2.get（arg）; Object [] obj = {args}; System.out.println（ Tardis：调用createTemplate函数）; method.invoke（handler，obj）; 返回 true; } } } catch （IllegalAccessException e）{ / / TODO自动生成的捕获块 e.printStackTrace（）; } catch （IllegalArgumentException e）{ // TODO自动生成的捕获块 e.printStackTrace（）; } catch （InvocationTargetException e）{ // TODO自动生成的捕获块 e.printStackTrace（）; } catch （SecurityException e）{ // TODO自动生成的捕获块 e.printStackTrace（）; } } 其他 { 字符串 comError = 未定义的设置类型。; sendError（sender，comError）; } } return false; } 这是错误： [14:39:46] [服务器主题/信息]：Tardis：收到的命令 [14:39:46] [服务器主题/信息]：Tardis：建筑词典 [14:39:46] [服务器线程/信息]：Tardis：启动第一阶段多态性 [14:39:46] [服务器线程/信息]：Tardis：第一阶段多态执行 [14:39:46] [服务器线程/ WARN]：java.lang.IllegalArgumentException：参数类型不匹配 [14： 39:46] [服务器线程/警告]：at sun.reflect.NativeMethodAccessorImpl.invoke0（原生方法） [14:39:46] [服务器线程/警告]：在sun.reflect。 NativeMethodAccessorImpl.invoke（未知来源） [14:39:46] [服务器线程/警告]：at sun.reflect.DelegatingMethodAccessorImpl.invoke（未知来源） [ 14:39:46] [服务器线程/警告]：在java.lang.reflect.Method.invoke（未知来源） [14:39:46] [服务器线程/警告]：在au.com.mshcraft.tardis.CommandHan dler.executeCommand（CommandHandler.java:84） [14:39:46] [服务器线程/警告]：at au.com.mshcraft.tardis.Tardis.onCommand（Tardis.java:28 ） [14:39:46] [服务器线程/警告]：at org.bukkit.command.PluginCommand.execute（PluginCommand.java:44） [14 ：39：46] [服务器线程/ WARN]：at org.bukkit.command.SimpleCommandMap.dispatch（SimpleCommandMap.java:141） [14:39:46] [服务器线程/ WARN] ：at net.minecraft.server.v1_9_R2.CommandBlockListenerAbstract.executeCommand（CommandBlockListenerAbstract.java:219) [14:39:46] [服务器线程/警告]：at net.minecraft.server.v1_9_R2 .CommandBlockListenerAbstract.a（CommandBlockListenerAbstract.java:104） [14:39:46] [服务器线程/警告]：在net.minecraft.server.v1_9_R2.BlockCommand.b（BlockCommand.java： 77） [14:39:46] [服务器线程/警告]：在net.minecraft.server.v1_9_R2.WorldServer.a（WorldServer.java:737） [14:39:46] [服务器线程/警告]：在net.minecraft.server.v1_9_R2.WorldServ er.doTick（WorldServer.java:249） [14:39:46] [服务器线程/警告]：在net.minecraft.server.v1_9_R2.MinecraftServer.D（MinecraftServer.java:781） ） [14:39:46] [服务器线程/警告]：在net.minecraft.server.v1_9_R2.DedicatedServer.D（DedicatedServer.java:399） [14:39:46] [服务器线程/警告]：在net.minecraft.server.v1_9_R2.MinecraftServer.C（MinecraftServer.java:665） [14:39:46] [服务器thread / WARN]：在net.minecraft.server.v1_9_R2.MinecraftServer.run（MinecraftServer.java:564） [14:39:46] [服务器线程/警告]：在java.lang .Thread.run（未知来源） 我的尝试： 尝试更改测试： if （actions1。 containsKey（arg））） 到目前的状态。解决方案 不要问我这个程序是如何反向运行的，但我修复了它： private HashMap< String，Method> dictionary（ String []命令， String [] methods）{ actions = null; actions = new HashMap< String，Method>（）; 当我在字典函数的第二次调用中明确地将键createcamouflage分配给动作HashMap时，为什么在字典方法中HashMap的动作返回时使用键createcamouflage第一次调用它。这非常令人费解，它看起来好像2个调用语句在编译时被反转。 ie： actions1 = dictionary（commands1，methods1）; actions2 =字典（commands2，methods2）; 似乎正在运行： actions2 = dictionary（commands2，methods2）; actions1 =字典（commands1，methods1）; 有没有人有答案这个还是我读错了/我错过了我做错的事吗？ I am writing a Spigot Dr Who Tardis plugin for a friend who plays on my server.When I execute the command "/tardis help", the command executes successfully. However when I execute the command "/tardis createcamouflage 735 66 -1352 739 68 -1356", I get an IllegalArgumentException: argument type mismatch.The big question...Why is the test at line 79 returning true?????? I have marked lines 79 and 84 with comments.Here is the code:public class CommandHandler {Plugin plugin;TardisListener tardisListener;public CommandHandler(Plugin instance) {this.plugin = instance;this.tardisListener = new TardisListener(this.plugin);}String[] commands1 = {"help","create","save"};String[] methods1 = {"giveHelp", "createBox","saveBoxes"};String[] commands2 = {"createcamouflage"};String[] methods2 = {"createTemplate"};HashMap<String, Method> actions = new HashMap<String, Method>();HashMap<String, Method> actions1 = new HashMap<String, Method>();HashMap<String, Method> actions2 = new HashMap<String, Method>();private HashMap<String, Method> dictionary(String[] commands, String[] methods) {for (int i=0; i<commands.length; i++) {Method m[] = this.getClass().getDeclaredMethods();try {for (int c = 0; c < m.length; c++) {if (m[c].getName().equalsIgnoreCase(methods[i])) { this.actions.put(commands[i], m[c]);}}} catch (SecurityException e) {// TODO Auto-generated catch blocke.printStackTrace();}}return actions;}public boolean executeCommand(CommandSender sender, Command cmd, String label, String[] args) {if (sender instanceof Player) {Player player = (Player) sender;player.sendMessage("Command Received");} else {System.out.println("Tardis: Command Received");}if (cmd.getName().equalsIgnoreCase("tardis")) { // If the player typed /tardis then do the following...if (args.length != 0) {String arg = args[0].toLowerCase();System.out.println("Tardis: Building Dictionary");actions1 = dictionary(commands1, methods1);actions2 = dictionary(commands2, methods2);System.out.println("Tardis: Start 1st stage polymorphism");Method method;try {for (String key : actions1.keySet()) {if (key.equalsIgnoreCase(arg)) { // line 79, Why are you returning true?!System.out.println("Tardis: 1st stage polymorphism executing");CommandHandler handler = new CommandHandler(plugin);method = actions1.get(arg);Object[] obj = {sender};method.invoke(handler, obj); // line 84, why are you being invoked?return true; }}System.out.println("Tardis: Start 2nd stage polymorphism");for (String key : actions2.keySet()) {if (key.equalsIgnoreCase(arg)) {CommandHandler handler = new CommandHandler(plugin);method = actions2.get(arg);Object[] obj = {args};System.out.println("Tardis: invoking createTemplate function");method.invoke(handler, obj);return true;}}} catch (IllegalAccessException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IllegalArgumentException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (InvocationTargetException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (SecurityException e) {// TODO Auto-generated catch blocke.printStackTrace();}} else {String comError = "Undefined Setting Type."; sendError(sender, comError);}}return false;}And here is the error:[14:39:46] [Server thread/INFO]: Tardis: Command Received[14:39:46] [Server thread/INFO]: Tardis: Building Dictionary[14:39:46] [Server thread/INFO]: Tardis: Start 1st stage polymorphism[14:39:46] [Server thread/INFO]: Tardis: 1st stage polymorphism executing[14:39:46] [Server thread/WARN]: java.lang.IllegalArgumentException: argument type mismatch[14:39:46] [Server thread/WARN]: at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)[14:39:46] [Server thread/WARN]: at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)[14:39:46] [Server thread/WARN]: at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)[14:39:46] [Server thread/WARN]: at java.lang.reflect.Method.invoke(Unknown Source)[14:39:46] [Server thread/WARN]: at au.com.mshcraft.tardis.CommandHandler.executeCommand(CommandHandler.java:84)[14:39:46] [Server thread/WARN]: at au.com.mshcraft.tardis.Tardis.onCommand(Tardis.java:28)[14:39:46] [Server thread/WARN]: at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)[14:39:46] [Server thread/WARN]: at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141)[14:39:46] [Server thread/WARN]: at net.minecraft.server.v1_9_R2.CommandBlockListenerAbstract.executeCommand(CommandBlockListenerAbstract.java:219)[14:39:46] [Server thread/WARN]: at net.minecraft.server.v1_9_R2.CommandBlockListenerAbstract.a(CommandBlockListenerAbstract.java:104)[14:39:46] [Server thread/WARN]: at net.minecraft.server.v1_9_R2.BlockCommand.b(BlockCommand.java:77)[14:39:46] [Server thread/WARN]: at net.minecraft.server.v1_9_R2.WorldServer.a(WorldServer.java:737)[14:39:46] [Server thread/WARN]: at net.minecraft.server.v1_9_R2.WorldServer.doTick(WorldServer.java:249)[14:39:46] [Server thread/WARN]: at net.minecraft.server.v1_9_R2.MinecraftServer.D(MinecraftServer.java:781)[14:39:46] [Server thread/WARN]: at net.minecraft.server.v1_9_R2.DedicatedServer.D(DedicatedServer.java:399)[14:39:46] [Server thread/WARN]: at net.minecraft.server.v1_9_R2.MinecraftServer.C(MinecraftServer.java:665)[14:39:46] [Server thread/WARN]: at net.minecraft.server.v1_9_R2.MinecraftServer.run(MinecraftServer.java:564)[14:39:46] [Server thread/WARN]: at java.lang.Thread.run(Unknown Source)What I have tried:tried changing the tests from:if (actions1.containsKey(arg)))to what they currently are. 解决方案 Don't ask me how this program is running in reverse but I fixed it with:private HashMap<String, Method> dictionary(String[] commands, String[] methods) { actions = null; actions = new HashMap<String, Method>();Why is the actions HashMap in the dictionary method returning with the key "createcamouflage" the first time its invoked when I am clearly assigning the key "createcamouflage" to the actions HashMap in the 2nd invokation of the dictionary function. This is very puzzling, its appearing as if the 2 invoking statements are inverted at compile time.ie:actions1 = dictionary(commands1, methods1);actions2 = dictionary(commands2, methods2);Appears to be running as:actions2 = dictionary(commands2, methods2);actions1 = dictionary(commands1, methods1);Does anyone have an answer to this or am I reading it incorrectly / did I miss something I did wrong? 这篇关于Java问题，为什么我在使用invoke命令时遇到了一个非法的问题？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！