Bukkit - 从其他@EventHandlers获取变量？

Question

我不知道我怎么会从不同的@EventHandler得到一个变量。我的变量在这个实例中是一个数组列表。

我的代码如下：

@EventHandler 
public void onBlockBreak(BlockBreakEvent event) { 
    ArrayList<String> build = new ArrayList(); 
    Player player = event.getPlayer(); 
    if(!player.isOp()) { 
     event.setCancelled(true); 
    }else if(!build.contains(player)) { 
     event.setCancelled(true); 
    }else if(build.contains(player)) { 
     event.setCancelled(false); 
    } 
} 
@EventHandler 
public void onPlayerJoin(PlayerJoinEvent event) { 
    Player player = event.getPlayer(); 
    event.setJoinMessage("§4§l>>§a§l " + player + " §b§ljoined! §4§l<<"); 
    if(build.contains(player)) { 
     build.remove(player); 

现在，在第二@EventHandler它无法解析变量“打造”这是我在以前的@EventHandler定义。那么我怎么才能做到这一点呢？

Answer 1

build是一个局部变量和仅是方法onBlockBreak(BlockBreakEvent event)内可用。

你想要做什么是声明一个变量的方法之外，在它的onEnable()方法对其进行初始化。你也应该做KingFaris10提到并存储玩家的UUID。您还需要添加玩家到ArrayList。

private ArrayList<UUID> build; 
@Override 
public void onEnable() { 
    build = new ArrayList<UUID>(); 
} 

@EventHandler 
public void onBlockBreak(BlockBreakEvent event) { 
    Player player = event.getPlayer(); 
    //Following derived from KingFaris10 
    if (!player.isOp() || !build.contains(player.getUUID())) event.setCancelled(true); 
    else event.setCancelled(false); 
} 
@EventHandler 
public void onPlayerJoin(PlayerJoinEvent event) { 
    Player player = event.getPlayer(); 
    event.setJoinMessage("§4§l>>§a§l " + player + " §b§ljoined! §4§l<<"); 
    UUID id = player.getUUID(); 
    if(build.contains(id)) { 
     build.remove(id);