检查列表中的每个特定项目是否都在哈希图中？

Question

我是 bukkit jython/python 插件编码器，但我被困在这里。我有一个由服务器预先生成的array.array（即ArrayList），并返回在线玩家列表。

就是这样：

online = Bukkit.getOnlinePlayers()

那我想要什么？ （检查#hashcmets）

我创建了这个 HashMap()：

channelList = HashMap()

@hook.command("channel", usage="/channel [channelname]", desc="Use this command to join an channel!",
              aliases = ["c", "cjoin", "cj"])
def channel(sender, command, args):
    channel = args[0]
    channelList.put(sender, channel) #so if player does /channel balkan command it puts his name and channel (balkan in this case) in hashmap...
    sender.sendMessage("%sYou've successfully joined %s %s %s channel!"%(bukkit.ChatColor.DARK_AQUA, bukkit.ChatColor.AQUA, channel, bukkit.ChatColor.DARK_AQUA))
    return True

@hook.event("player.PlayerChatEvent", "NORMAL")
def onPlayerChatEvent(event):
    p = event.getPlayer()
    message = event.getMessage()
    messagesubstring = message[:1]
    event.setCancelled(1)
    playername = event.getPlayer().getDisplayName()
       if messagesubstring == "!":
          plist1 = #How do I get this list? It's list of players that are in HashMap with "balkan" as second hashmap argument...
          userChannel = "balkan"
          online = Bukkit.getOnlinePlayers()
          lenghtonline = len(online)
          b = lenghtonline - 1
          a = 0
          if a <= b:
             if channelList.get(p) == userChannel:
                plist1.sendMessage("blabla")

提前致谢！

Answer 1

您可以使用HashMap.entrySet() 来迭代HashMap 的条目：

Java：

for(Entry<String, String> e: channelList.entrySet()){
     if(userChannel.equals(e.getValue()){
          pist1.add(e.getKey());
     }
}

在 Jython 中，您可能需要这样调用：

Iterator<Entry<String, String>> it = channelList.entrySet().iterator();
while(it.hasNext()){
    Entry<String, String> e = it.next();
    ...
}