Question

最近我开始开发一个Bukkit插件，我需要帮助我在代码中休眠/等待。我是java的新手，所以如果你能解释一下，我会很感激。这是我的代码：

@EventHandler
public void onTnt(PlayerInteractEntityEvent e) {
    Player clicker = e.getPlayer();
    Player rightclick = (Player) e.getRightClicked();
    rightclick.sendMessage(ChatColor.GRAY + "~" + ChatColor.DARK_PURPLE + "AN INSTAKILLER HAS YOU AS A TARGET! SNEAK NOW!");
    rightclick.sendMessage(ChatColor.GRAY + "~" + ChatColor.DARK_RED + "AN INSTAKILLER HAS YOU AS A TARGET! SNEAK NOW!");
    rightclick.sendMessage(ChatColor.GRAY + "~" + ChatColor.GOLD + "AN INSTAKILLER HAS YOU AS A TARGET! SNEAK NOW!");
    /* Then wait 3 sec. I've tried Thread.Sleep, wait() and sleep(), no sucess*/

    if (!(rightclick.isSneaking()))  {
        rightclick.sendMessage(ChatColor.GRAY + "~" + ChatColor.GOLD + "Bye bye.");
        rightclick.setHealth(0);

    }

}

Answer 1

虽然通常你会使用Thread.sleep这样的东西，这会冻结整个服务器，并且在那段时间内不会处理事件（所以即使玩家停止偷偷摸摸他们，他们' d仍然是从服务器看到的东西偷偷摸摸的。）

您需要做的是使用BukkitRunnable（或者常规Runnable和getServer().getScheduler().scheduleSyncDelayedTask）：

@EventHandler
public void onTnt(PlayerInteractEntityEvent e) {
    Player clicker = e.getPlayer();
    // Needs to be final to reference it later
    final Player rightclick = (Player) e.getRightClicked();
    rightclick.sendMessage(ChatColor.GRAY + "~" + ChatColor.DARK_PURPLE + "AN INSTAKILLER HAS YOU AS A TARGET! SNEAK NOW!");
    rightclick.sendMessage(ChatColor.GRAY + "~" + ChatColor.DARK_RED + "AN INSTAKILLER HAS YOU AS A TARGET! SNEAK NOW!");
    rightclick.sendMessage(ChatColor.GRAY + "~" + ChatColor.GOLD + "AN INSTAKILLER HAS YOU AS A TARGET! SNEAK NOW!");


    BukkitRunnable task = new BukkitRunnable() {
        @Override
        public void run() {
            if (!(rightclick.isSneaking()))  {
                rightclick.sendMessage(ChatColor.GRAY + "~" + ChatColor.GOLD + "Bye bye.");
                rightclick.setHealth(0);
            }
        }
    };
    // Run the task on this plugin in 3 seconds (60 ticks)
    task.runTaskLater(this, 20 * 3);
}

Answer 2

我知道这是一个老问题，但我想添加一些内容，以便寻找方法的用户可以找到这个。

最简单的说法是创建一个计划任务：

Bukkit.getServer().getScheduler().scheduleSyncDelayedTask(this, new Runnable() {
// The stuff which should be accomplished after the timer runs out goes here.
// Example:
player.sendMessage("The time has ran out!");
}, time);

现在，让我们了解一下这里发生了什么。基本上，se已创建延迟任务（有两种类型的计划任务：延迟和重复任务）。上述方法的第一个参数是this。这应该是您的主类的实例（org.bukkit.plugin.java.JavaPlugin的子类）。这意味着如果计划任务不在您的主类中，您将需要将this替换为它的实例。第二个参数是new Runnable() { ... }，我们实际上是在创建runnable。无论在计时器用完时应该执行什么，都应该进入花括号内。最后，最后一个参数：这是实际延迟，以TICKS为单位。这意味着，如果您希望等待x秒，则必须乘以x * 20，因为刻度等于1/20秒，因此5秒将等于100个刻度。

如果您知道如何使用lambdas，则可以替换匿名类：

Bukkit.getServer().getScheduler().scheduleSyncDelayedTask(this, () -> player.sendMessage("The time has ran out!"), time);

bukkit - 等待？

2 个答案: