我希望将game设置为Game的新实例，并且我想将this传递给游戏。这就是我所拥有的。
var game: Game
init {
game = Game(this)
}
我也试过
var game: Game = Game(this)
在运行时都抛出NullPointer，但在Intellij中看起来很好并且编译没有问题。我做错了什么？
堆栈跟踪
org.bukkit.plugin.InvalidPluginException: java.lang.NullPointerException
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:135) ~[server.jar:git-Spigot-21fe707-e1ebe52]
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:329) ~[server.jar:git-Spigot-21fe707-e1ebe52]
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [server.jar:git-Spigot-21fe707-e1ebe52]
at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugins(CraftServer.java:292) [server.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:198) [server.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:525) [server.jar:git-Spigot-21fe707-e1ebe52]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_121]
Caused by: java.lang.NullPointerException
at org.bukkit.plugin.SimplePluginManager.registerEvents(SimplePluginManager.java:523) ~[server.jar:git-Spigot-21fe707-e1ebe52]
at me.darkpaladin.uhc.game.gameSettings.GameSettingsManager.addGameSettings(GameSettingsManager.kt:43) ~[?:?]
at me.darkpaladin.uhc.game.gameSettings.GameSettingsManager.<init>(GameSettingsManager.kt:20) ~[?:?]
at me.darkpaladin.uhc.game.Game.<init>(Game.kt:49) ~[?:?]
at me.darkpaladin.uhc.UHC.<init>(UHC.kt:20) ~[?:?]
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_121]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[?:1.8.0_121]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:1.8.0_121]
at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[?:1.8.0_121]
at java.lang.Class.newInstance(Class.java:442) ~[?:1.8.0_121]
at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:76) ~[server.jar:git-Spigot-21fe707-e1ebe52]
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:131) ~[server.jar:git-Spigot-21fe707-e1ebe52]
... 6 more
UHC课程
var game: Game
init {
game = Game(this)
}
override fun onReady() {
// new Lobby(Bukkit.getWorld("world"), this, false);
TeamManager()
registerCommands()
}
fun registerCommands() {
val c = commandHandler
c.addCommand(
TeamCommand(),
SetGameTypeCommand(game),
ClaimHostCommand(game),
StartGameCommand(game),
ScenarioManagerCommand(game),
KillTopCommand(game),
ConfigCommand(game),
ScatterCommand(game)
)
}
fun registerListeners() {
val p = Bukkit.getPluginManager()
p.registerEvents(GamePlayerListener(game), this)
}
游戏类
package me.darkpaladin.uhc.game
import me.darkpaladin.core.Core
import me.darkpaladin.core.utils.CoreUtils
import me.darkpaladin.core.utils.PacketUtils
import me.darkpaladin.uhc.UHC
import me.darkpaladin.uhc.events.GameStartEvent
import me.darkpaladin.uhc.events.GameStopEvent
import me.darkpaladin.uhc.game.gameEvents.GameEvent
import me.darkpaladin.uhc.game.gameEvents.GameEventRunnable
import me.darkpaladin.uhc.game.gamePlayers.GamePlayer
import me.darkpaladin.uhc.game.gamePlayers.GamePlayerManager
import me.darkpaladin.uhc.game.gameSettings.GameSettingsManager
import me.darkpaladin.uhc.scenarios.ScenarioManager
import org.apache.commons.lang.WordUtils
import org.bukkit.*
import org.bukkit.entity.Item
import org.bukkit.entity.Monster
import org.bukkit.entity.Player
import org.bukkit.scheduler.BukkitRunnable
import java.util.*
/**
* Created by Caleb on 4/28/2017.
*/
class Game(private val plugin: UHC) {
var gameType = GameType.NORMAL
var gameState = GameState.SETTING_UP
var gameStartTicks = (CoreUtils.ticksPerSecond * 10).toLong()
var finalHealTime = (CoreUtils.ticksPerSecond * 15).toLong()
var pvpTicks = (CoreUtils.ticksPerSecond * 20).toLong()
var meetupTicks = (CoreUtils.ticksPerSecond * 25).toLong()
var isBorderShrink = true
var episodeLength = (CoreUtils.ticksPerMinute * 20).toLong()
private var episode = 1
private val worlds = ArrayList<World>()
private val gameEvents = ArrayList<GameEvent>()
var gameTicks: Long = 0L
var hostUuid: UUID? = null
val scenarioManager: ScenarioManager = ScenarioManager(this)
val gamePlayerManager: GamePlayerManager = GamePlayerManager()
val gameSettingsManager: GameSettingsManager = GameSettingsManager(this)
private val instance: Game
init {
worlds.add(Bukkit.getWorld("world")) //TODO: remove
instance = this
}
val overworld: World?
get() = getWorldWithEnvironment(World.Environment.NORMAL)
val nether: World?
get() = getWorldWithEnvironment(World.Environment.NETHER)
val end: World?
get() = getWorldWithEnvironment(World.Environment.THE_END)
fun getWorldWithEnvironment(environment: World.Environment): World? {
return worlds.firstOrNull { it.environment == environment }
}
fun addGameEvent(vararg events: GameEvent) {
gameEvents.addAll(Arrays.asList(*events))
}
val host: Player
get() = Bukkit.getPlayer(hostUuid)
fun start() {
gameState = GameState.STARTING
val finalHeal = GameEvent("Final Heal", finalHealTime, object : GameEventRunnable(this) {
override fun run() {
Bukkit.getOnlinePlayers().forEach { player -> player.health = player.maxHealth }
CoreUtils.broadcast(Core.PREFIX + "Final Heal has been given. This is the FINAL heal. Do not ask for more.")
}
})
val pvp = GameEvent("PvP", pvpTicks, object : GameEventRunnable(this) {
override fun run() {
for (world in worlds) {
world.pvp = true
world.setGameRuleValue("doMobSpawning", "true")
}
}
})
val starting = GameEvent("Starting in", gameStartTicks, object : GameEventRunnable(this) {
override fun run() {
gameTicks = 0L
addGameEvent(finalHeal, pvp)
if (isBorderShrink)
addGameEvent(BorderShrinkGameEvent(meetupTicks, instance))
for (player in Bukkit.getOnlinePlayers()) {
player.health = player.maxHealth
player.foodLevel = 20
player.saturation = 20f
player.level = 0
player.exp = 0f
player.totalExperience = 0
player.closeInventory()
player.inventory.clear()
player.inventory.armorContents = null
player.gameMode = GameMode.SURVIVAL
player.activePotionEffects.forEach { potionEffect -> player.removePotionEffect(potionEffect.type) }
}
for (world in worlds) {
for (entity in world.entities) {
if (entity is Item || entity is Monster) {
entity.remove()
}
}
world.pvp = false
world.difficulty = Difficulty.HARD
world.time = 20
world.setSpawnFlags(false, false)
}
Bukkit.getOnlinePlayers().forEach { player -> gamePlayerManager.addGamePlayers(GamePlayer(player.uniqueId)) }
val players = ArrayList<Player>()
gamePlayerManager.aliveGamePlayers
.filter { gamePlayer -> gamePlayer.player != null }
.forEach { gamePlayer -> players.add(gamePlayer.player) }
scenarioManager.giveStartingItems(players)
gameState = GameState.RUNNING
Bukkit.getPluginManager().callEvent(GameStartEvent(instance))
}
})
addGameEvent(starting)
GameTimer().runTaskTimer(plugin, 0, 1)
if (gameType === GameType.RECORDED)
EpisodeTimerTask()
}
val nextEvent: GameEvent?
get() {
val events = gameEvents
val times = HashMap<GameEvent, Long>()
events.forEach { gameEvent -> times.put(gameEvent, gameEvent.time) }
var nextEvent: GameEvent? = null
var nextEventTime: Long = 999999999999999999L
for (event in times.keys) {
if (event.time < nextEventTime) {
nextEvent = event
nextEventTime = event.time
}
}
return nextEvent
}
fun getNextBorderRadius(world: World): Int {
return Math.round(world.worldBorder.size / 2 * .75).toInt()
}
private inner class GameTimer : BukkitRunnable() {
override fun run() {
val nextEvent = nextEvent
if (nextEvent != null) {
if (gameTicks!! % 20 == 0L) {
PacketUtils.sendAction(Core.HIGHLIGHTED_COLOR.toString() + ChatColor.BOLD.toString() + WordUtils.capitalizeFully(nextEvent.name) + Core.EXTRA_COLOR + " » " + Core.HIGHLIGHTED_COLOR + CoreUtils.formatTicks(nextEvent.time - gameTicks!!))
}
if (gameTicks >= nextEvent.time) {
nextEvent.runnable!!.run()
gameEvents.remove(nextEvent)
}
}
gameTicks++
}
}
private inner class BorderShrinkGameEvent(time: Long, game: Game) : GameEvent("Border Shrink", time, object : GameEventRunnable(game) {
override fun run() {
for (world in worlds) {
val wb = world.worldBorder
val radius = Math.round(wb.size / 2).toInt()
val newRadius = Math.round(wb.size / 2 * .75).toInt()
if (newRadius < 50)
wb.size = 100.0
else
wb.size = (newRadius * 2).toDouble()
CoreUtils.broadcast(Core.PREFIX + "The border has shrunk from " + radius + " to " + Math.round(wb.size / 2).toInt() + "!")
if (wb.size > 100) {
game.addGameEvent(BorderShrinkGameEvent(CoreUtils.ticksPerSecond * 5 + game.gameTicks!!, game))
}
}
}
})
private inner class EpisodeTimerTask : BukkitRunnable() {
private var ticks: Long = 0
init {
ticks = episodeLength
}
override fun run() {
if (ticks <= 0) {
cancel()
CoreUtils.broadcast(Core.PREFIX + "End of episode " + episode + ". Start episode " + episode + 1)
episode++
return
}
ticks--
}
}
fun stop() {
scenarioManager.disableAll()
Bukkit.getPluginManager().callEvent(GameStopEvent(this))
plugin.game = Game(plugin)
}
}
游戏设置管理器
package me.darkpaladin.uhc.game.gameSettings
import me.darkpaladin.core.Core
import me.darkpaladin.uhc.game.Game
import org.bukkit.Bukkit
import org.bukkit.event.Listener
import java.util.ArrayList
import java.util.Arrays
import java.util.stream.Collectors
/**
* Created by caleb on 5/6/17.
*/
class GameSettingsManager(game: Game) {
private val gameSettings = ArrayList<GameSetting>()
init {
addGameSettings(
FriendlyFireGameSetting(game),
NotchApplesGameSetting(),
DoubleArrowsGameSetting()
)
}
fun getGameSettings(): List<GameSetting> {
return gameSettings
}
val toggleableGameSettings: List<ToggleableGameSetting>
get() {
val settings = ArrayList<ToggleableGameSetting>()
for (setting in getGameSettings())
if (setting is ToggleableGameSetting)
settings.add(setting)
return settings
}
fun addGameSettings(vararg gameSettings: GameSetting) {
this.gameSettings.addAll(Arrays.asList(*gameSettings))
for(setting in gameSettings)
Bukkit.getPluginManager().registerEvents(setting as Listener, Core.instance)
}
fun getGameSetting(name: String): GameSetting {
return gameSettings.stream()
.filter { gameSetting -> gameSetting.name.equals(name, ignoreCase = true) }
.collect(Collectors.toList<GameSetting>())[0]
}
}
答案 0 :(得分：1)
GameSettingsManager的第43行：
fun addGameSettings(vararg gameSettings: GameSetting) {
this.gameSettings.addAll(Arrays.asList(*gameSettings))
for(setting in gameSettings) //line 43 is the one below this
Bukkit.getPluginManager().registerEvents(setting as Listener, Core.instance)
}
传递到setting的{{1}}个对象之一是Bukkit.getPluginManager()。
或null是Core.Instance。
另一种可能性是null返回的对象在其中有一个在getPluginManager()函数中被引用的整数变量。
但最可能的情况是您的registerEvents()个对象之一为空或setting为空。
修改
以下是运行bukkit库中Core.Instance的{{1}}函数：
registerEvents()根据您的堆栈跟踪线523是抛出SimplePluginManager指针异常的线。所以有public void registerEvents(Listener listener, Plugin plugin) {
if (!plugin.isEnabled()) {
//the next line is 523
throw new IllegalPluginAccessException("Plugin attempted to register " + listener + " while not enabled");
}
for (Map.Entry<Class<? extends Event>, Set<RegisteredListener>> entry : plugin.getPluginLoader().createRegisteredListeners(listener, plugin).entrySet()) {
getEventListeners(getRegistrationClass(entry.getKey())).registerAll(entry.getValue());
}
}
的东西。监听器变量来自你的gameSettings数组。
在那个gameSettings null数组中，查看代码确实不应该是null。但抛出错误的函数却是另外说的。调试到该位置或在循环访问gameSettings数组时执行null以验证它们都不为空是个好主意。