kotlin - 期望顶级声明出现顶级声明错误

Question

我是 Kotlin 的新手，伙计，它太棒了!

我正在使用 JDA 和 Maven 创建一个 Discord 机器人，它可以工作，但是，我创建了一个基本的命令处理程序，现在，我在顶级声明中收到很多错误，说“期待顶级声明” . 🤔

这是我的代码(顺便说一句，我已经发现 Array<String?> 错误):

package com.blueslimee.kirani.listeners

import net.dv8tion.jda.core.entities.*
import net.dv8tion.jda.core.hooks.*
import net.dv8tion.jda.core.JDA
import net.dv8tion.jda.core.events.message.MessageReceivedEvent
import com.blueslimee.kirani.utils.KiraniLogging
import com.blueslimee.kirani.KiraniCommand
import com.blueslimee.kirani.utils.Registry

class MessageListener() : ListenerAdapter() {
  override fun onMessageReceived (event: MessageReceivedEvent) {
    val jda: JDA = event.getJDA()
    // todo: cmds guild-only  event.isFromType(ChannelType.TEXT)
    if (!event.getAuthor().isBot()) {
        var msgContent: String? = event.getMessage()
        if (msgContent === null) {
          return 
        }
        var args: Array<String?> = msgContent!!.split(" ")
        var firstArg: String? = args[0]
        if (!firstArg!!.startsWith("k-", true)) {
          return 
        }
        firstArg = firstArg!!.replace("k-", "", true)
        var cmde: KiraniCommand? = Registry.getCommand(firstArg)
        if (cmde  != null) {
          try {
            cmde!!.run(jda, event, args)
          } catch (e: Exception) {
            event.getChannel().sendMessage("Oopsie Woopsie, um erro ocorreu! Meu dono já foi reportado sobre, peço que aguarde.").queue()
            e.printStackTrace()
          }
       }
    }
  }
}

谢谢!

Answer 1

使用

var args: List<String> = msgContent.split(" ").toList()

代替

var args: Array<String?> = msgContent!!.split(" ")