英文:
Bukkit.getPlayer() throws a number format exception
问题
我对Minecraft插件开发还是相当新手，我正在尝试制作自己的Essentials插件的简化版本。我正在努力创建一个命令，允许我设置飞行速度，以及其他玩家的飞行速度。设置速度很正常，但是我似乎无法正确处理目标其他玩家的部分。当我执行命令时，日志中出现以下内容：
[23:55:50 INFO]: swalloich执行了服务器命令：/flyspeed swalloich 2
[23:55:50 INFO]: swalloichtargeted用flySpeed命令定位了swalloich。
[23:55:50 ERROR]: null
org.bukkit.command.CommandException：在插件EssentialsLite v0.2中执行命令'flyspeed'时出现未处理的异常
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47) ~[craftbukkit-1.16.2.jar：git-Bukkit-43c7ff9]
...
Caused by: java.lang.NumberFormatException：对于字符串输入：“swalloich”
...
at me.swall.essentialsLite.commands.FlySpeed.onCommand(FlySpeed.java:62) ~[？：？]
...
我几乎确定问题出现在我代码的这部分：
float flySpeed = (float)(Integer.parseInt(args[1]) / 10.0);
Bukkit.getLogger().info(player.getDisplayName() + " 用flySpeed命令定位了 " + args[0] + "。");
if (Integer.parseInt(args[0]) > 10 || Integer.parseInt(args[0]) < 0)
{
sender.sendMessage("速度参数必须是0到10之间的整数。");
}
else
{
//将目标玩家的飞行速度设置为作为第二个参数提供的值
Player targetPlayer = Bukkit.getPlayerExact(args[0]);
Bukkit.getLogger().info("已初始化targetPlayer。");
if (targetPlayer != null && player.isOnline())
{
targetPlayer.setFlySpeed(flySpeed);
Bukkit.getLogger().info("已将用户 " + player.getDisplayName() + " 的飞行速度设置为 " + args[0]);
}
else
{
sender.sendMessage("未找到该玩家。");
}
}
我做错了什么？
英文:
I'm pretty new to Minecraft plugin development and I'm trying to make my own lite version of the essentials plugin. I'm trying to make a command that will allow me to set my fly speed as well as the fly speed of others. setting speed works just fine, however, targeting other players is something I can't seem to manage. When I execute the command, this appears in the log:
[23:55:50 INFO]: swalloich issued server command: /flyspeed swalloich 2
[23:55:50 INFO]: swalloichtargeted swalloich with the flySpeed command.
[23:55:50 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'flyspeed' in plugin EssentialsLite v0.2
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47) ~[craftbukkit-1.16.2.jar:git-Bukkit-43c7ff9]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:148) ~[craftbukkit-1.16.2.jar:git-Bukkit-43c7ff9]
at org.bukkit.craftbukkit.v1_16_R2.CraftServer.dispatchCommand(CraftServer.java:735) ~[craftbukkit-1.16.2.jar:git-Bukkit-43c7ff9]
at net.minecraft.server.v1_16_R2.PlayerConnection.handleCommand(PlayerConnection.java:1647) ~[craftbukkit-1.16.2.jar:git-Bukkit-43c7ff9]
at net.minecraft.server.v1_16_R2.PlayerConnection.a(PlayerConnection.java:1504) ~[craftbukkit-1.16.2.jar:git-Bukkit-43c7ff9]
at net.minecraft.server.v1_16_R2.PacketPlayInChat.a(SourceFile:36) ~[craftbukkit-1.16.2.jar:git-Bukkit-43c7ff9]
at net.minecraft.server.v1_16_R2.PacketPlayInChat.a(SourceFile:9) ~[craftbukkit-1.16.2.jar:git-Bukkit-43c7ff9]
at net.minecraft.server.v1_16_R2.PlayerConnectionUtils.lambda$0(PlayerConnectionUtils.java:19) ~[craftbukkit-1.16.2.jar:git-Bukkit-43c7ff9]
at net.minecraft.server.v1_16_R2.TickTask.run(SourceFile:18) ~[craftbukkit-1.16.2.jar:git-Bukkit-43c7ff9]
at net.minecraft.server.v1_16_R2.IAsyncTaskHandler.executeTask(SourceFile:144) ~[craftbukkit-1.16.2.jar:git-Bukkit-43c7ff9]
at net.minecraft.server.v1_16_R2.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23) ~[craftbukkit-1.16.2.jar:git-Bukkit-43c7ff9]
at net.minecraft.server.v1_16_R2.IAsyncTaskHandler.executeNext(SourceFile:118) ~[craftbukkit-1.16.2.jar:git-Bukkit-43c7ff9]
at net.minecraft.server.v1_16_R2.MinecraftServer.ba(MinecraftServer.java:899) ~[craftbukkit-1.16.2.jar:git-Bukkit-43c7ff9]
at net.minecraft.server.v1_16_R2.MinecraftServer.executeNext(MinecraftServer.java:892) ~[craftbukkit-1.16.2.jar:git-Bukkit-43c7ff9]
at net.minecraft.server.v1_16_R2.IAsyncTaskHandler.awaitTasks(SourceFile:127) ~[craftbukkit-1.16.2.jar:git-Bukkit-43c7ff9]
at net.minecraft.server.v1_16_R2.MinecraftServer.sleepForTick(MinecraftServer.java:876) ~[craftbukkit-1.16.2.jar:git-Bukkit-43c7ff9]
at net.minecraft.server.v1_16_R2.MinecraftServer.w(MinecraftServer.java:815) ~[craftbukkit-1.16.2.jar:git-Bukkit-43c7ff9]
at net.minecraft.server.v1_16_R2.MinecraftServer.lambda$0(MinecraftServer.java:155) ~[craftbukkit-1.16.2.jar:git-Bukkit-43c7ff9]
at java.lang.Thread.run(Thread.java:832) [?:?]
Caused by: java.lang.NumberFormatException: For input string: "swalloich"
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:68) ~[?:?]
at java.lang.Integer.parseInt(Integer.java:652) ~[?:?]
at java.lang.Integer.parseInt(Integer.java:770) ~[?:?]
at me.swall.essentialsLite.commands.FlySpeed.onCommand(FlySpeed.java:62) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[craftbukkit-1.16.2.jar:git-Bukkit-43c7ff9]
... 18 more
The portion of my code that I'm almost positive that it stems from is this:
float flySpeed = (float)(Integer.parseInt(args[1]) / 10.0);
Bukkit.getLogger().info(player.getDisplayName() + " targeted " + args[0] + " with the flySpeed command.");
if (Integer.parseInt(args[0]) > 10 || Integer.parseInt(args[0]) < 0)
{
sender.sendMessage("The speed argument must be a whole number between 0 and 10.");
}
else
{
//set the target player's fly speed to the value provided as the second argument
Player targetPlayer = Bukkit.getPlayerExact(args[0]);
Bukkit.getLogger().info("targetPlayer was initialized.");
if (targetPlayer != null && player.isOnline())
{
targetPlayer.setFlySpeed(flySpeed);
Bukkit.getLogger().info("The fly speed for user " + player.getDisplayName()
+ " has been set to" + args[0]);
}
else
{
sender.sendMessage("That player was not found.");
}
}
What am I doing wrong?
答案1
得分: 1
在代码的第一行，
你正在将字符串（args[1]）除以浮点数（10.0）。
float flySpeed = (float)(Integer.parseInt(args[1] / 10.0));
应该更改为：
float flySpeed = (float)(Integer.parseInt(args[1]) / 10.0);
另外，如果你在代码中要多次使用解析后的整数，我建议为此创建一个整数变量。
如果这样做，代码将如下所示：
int flySpeedArg = Integer.parseInt(args[1]);
float flySpeed = (float)(Integer.parseInt(args[1]) / 10.0);
Bukkit.getLogger().info(player.getDisplayName() + " targeted " + args[0] + " with the flySpeed command.");
if (flySpeedArg > 10 || flySpeedArg < 0)
{
sender.sendMessage("The speed argument must be a whole number between 0 and 10.");
}
else
{
// 将目标玩家的飞行速度设置为作为第二个参数提供的值
Player targetPlayer = Bukkit.getPlayerExact(args[0]);
Bukkit.getLogger().info("targetPlayer was initialized.");
if (targetPlayer != null && player.isOnline())
{
targetPlayer.setFlySpeed(flySpeed);
Bukkit.getLogger().info("The fly speed for user " + player.getDisplayName()
+ " has been set to " + args[0]);
}
else
{
sender.sendMessage("That player was not found.");
}
}
英文:
At the line 1 of the code,
You are dividing String (args[1]) against float (10.0).
float flySpeed = (float)(Integer.parseInt(args[1] / 10.0));
It should be changed into this:
float flySpeed = (float)(Integer.parseInt(args[1]) / 10.0);
+ if you are going to use parsed integer multiple times in the code,
I recommend creating integer variable for that.
If then, code will be look like this:
int flySpeedArg = Integer.parseInt(args[1]);
float flySpeed = (float)(Integer.parseInt(args[1]) / 10.0);
Bukkit.getLogger().info(player.getDisplayName() + " targeted " + args[0] + " with the flySpeed command.");
if (flySpeedArg > 10 || flySpeedArg < 0)
{
sender.sendMessage("The speed argument must be a whole number between 0 and 10.");
}
else
{
//set the target player's fly speed to the value provided as the second argument
Player targetPlayer = Bukkit.getPlayerExact(args[0]);
Bukkit.getLogger().info("targetPlayer was initialized.");
if (targetPlayer != null && player.isOnline())
{
targetPlayer.setFlySpeed(flySpeed);
Bukkit.getLogger().info("The fly speed for user " + player.getDisplayName()
+ " has been set to" + args[0]);
}
else
{
sender.sendMessage("That player was not found.");
}
}
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