java - 数组问题

Question

我在开发 Bukkit 插件时遇到了数组问题。为什么这不起作用？它应该检查玩家是否已经放置了方 block 。它一直在说“钻石!!”游戏中。

@EventHandler
public void OnPlaceofDiamond(BlockPlaceEvent e){
    Player player = e.getPlayer();
    String storage[] = new String[100];
    int i = 0;

    if(e.getBlock().getType() == Material.DIAMOND_BLOCK){
        if(Arrays.asList(storage).contains(player.getName())){
            player.sendMessage(ChatColor.BLUE + "You are on the list");
        }else{
            player.sendMessage(ChatColor.BLUE + "DIAMONDS!!");
            storage[i] = player.getName();
            i++;
        }
    }
}

Answer 1

这是因为每次玩家放置方 block 时都会创建一个新的存储数组:

@EventHandler
public void OnPlaceofDiamond(BlockPlaceEvent e){
    Player player = e.getPlayer();
    String storage[] = new String[100];

所以你永远不会有完整的球员名单。要解决此问题，您应该在方法外部声明 Array:

String storage[] = new String[100];

@EventHandler
public void OnPlaceofDiamond(BlockPlaceEvent e) {
    Player player = e.getPlayer();
    int i = 0;

    if(e.getBlock().getType() == Material.DIAMOND_BLOCK){
        if(Arrays.asList(storage).contains(player.getName())){
            player.sendMessage(ChatColor.BLUE + "You are on the list");
        }
        else{
            player.sendMessage(ChatColor.BLUE + "DIAMONDS!!");
            storage[i] = player.getName();
            i++;
        }
    }
}