Java问题，为什么我在使用invoke命令时遇到了一个非法的问题？ [英] Java question, why am I getting an illegalargumentexception when using the invoke command?
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。
< blockquote>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 block
e.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 block
e.printStackTrace();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.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.
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?
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