java - Player[] 从数组更改为集合

Question

我在 IDE 中收到此错误。该错误显示在 Bukkit.getOnlinePlayers() 下:

Required: org.bukkit.entity.Player[]
Found: java.util.Collection               <capture<? extends org.bukkit.entity.Player>>

这是代码。

public List<Player> getTargetV3(Arena arena, Player player, int maxRange, double aiming, boolean wallHack) {



    ArrayList target = new ArrayList();
    Location playerEyes = player.getEyeLocation();
    Vector direction = playerEyes.getDirection().normalize();
    ArrayList targets = new ArrayList();
    Player[] lx;
    int testLoc = (lx = Bukkit.getOnlinePlayers()).length;

    for(int loc = 0; loc < testLoc; ++loc) {
        Player block = lx[loc];
        if(block != player && block.getLocation().distanceSquared(playerEyes) < (double)(maxRange * maxRange)) {
            targets.add(block);
        }
    }}

Answer 1

该错误表明您使用了错误的数据类型(Collection 实例)。您应该将玩家集合转换为数组。

你可以这样做:

Player[] players = playersCollection.toArray(new Player[playersCollection.size()]);

注意:我使用了随机变量名称。调整变量的名称。