PlayerJoinEvent - 创建欢迎消息 Spigot 1.12.2 (Java)

Question

我不明白为什么他总是returns对我说“你没玩过”然后第一次还好，但第二次我不明白

我想提出一个条件：如果玩家已经玩过，我什么都不做：没有消息，玩家什么也没收到！如果玩家从未玩过：欢迎消息+他收到一个物品+我得到他的位置来爆炸烟花我想添加一个加入第二个条件的玩家的计数器

Commands Class:

package fr.antyss77.pandowelcome;

import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.entity.EntityType;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.inventory.ItemStack;

public class Commands implements Listener {
    private Main main;


    @EventHandler
    public void PlayerJoin(PlayerJoinEvent e) {
        Player player = e.getPlayer();
        Location loc = player.getLocation();

        boolean hasPlayed = player.hasPlayedBefore();

        if (hasPlayed != true) {
            player.sendMessage("You've already played !");
        } else {
            player.sendMessage("You never played !");
            player.getInventory().addItem(new ItemStack(Material.SAND, 12));
            loc.getWorld().spawnEntity(loc, EntityType.SPLASH_POTION);

        }
    }
}

Main class:

    package fr.antyss77.pandowelcome;

import net.md_5.bungee.api.ChatColor;
import org.bukkit.Bukkit;
import org.bukkit.plugin.java.JavaPlugin;

public class Main extends JavaPlugin {

    private String color(String arg) {
        return ChatColor.translateAlternateColorCodes('&', arg);
    }

    public void onEnable() {
        Bukkit.getConsoleSender().sendMessage(color("&6[&ePandoWelcomer&6] &ehas just started."));
        getServer().getPluginManager().registerEvents(new Commands(), this);
    }

    public void onDisable() {
        Bukkit.getConsoleSender().sendMessage(color("&6[&cPandoWelcomer&6] &ehas been shut down."));
    }
}

如果有人能帮助我理解我的错误，我将无限感激，提前谢谢！

Answer 1

if (hasPlayed != true) 应该是 if (hasPlayed == true)，因为它与您想要的相反。

您的代码如下所示：

package fr.antyss77.pandowelcome;

import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.entity.EntityType;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.inventory.ItemStack;

public class Commands implements Listener {
    private Main main;


    @EventHandler
    public void PlayerJoin(PlayerJoinEvent e) {
        Player player = e.getPlayer();
        Location loc = player.getLocation();

        boolean hasPlayed = player.hasPlayedBefore();

        if (hasPlayed == true) {
            player.sendMessage("You've already played !");
        } else {
            player.sendMessage("You never played !");
            player.getInventory().addItem(new ItemStack(Material.SAND, 12));
            loc.getWorld().spawnEntity(loc, EntityType.SPLASH_POTION);

        }
    }
}

PlayerJoinEvent - 创建欢迎消息 Spigot 1.12.2 (Java)

PlayerJoinEvent - Create a welcome message Spigot 1.12.2 (Java)

java

minecraft