Initial commit

src/main/java/xyz/lncvrt/galaxytab/GalaxyTab.java

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+package xyz.lncvrt.galaxytab;
+
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import org.bukkit.configuration.file.FileConfiguration;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerJoinEvent;
+import org.bukkit.plugin.java.JavaPlugin;
+
+public final class GalaxyTab extends JavaPlugin implements Listener {
+    private final MiniMessage miniMessage = MiniMessage.miniMessage();
+    private FileConfiguration config;
+
+    @Override
+    public void onEnable() {
+        saveDefaultConfig();
+        config = getConfig();
+        getServer().getPluginManager().registerEvents(this, this);
+    }
+
+    @EventHandler
+    public void onPlayerJoinEvent(PlayerJoinEvent event) {
+        Component header = miniMessage.deserialize(String.join("\n", config.getStringList("header")));
+        Component footer = miniMessage.deserialize(String.join("\n", config.getStringList("footer")));
+        event.getPlayer().sendPlayerListHeaderAndFooter(header, footer);
+    }
+}

src/main/resources/config.yml

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+header:
+  - "Header"
+footer:
+  - "Footer"

src/main/resources/paper-plugin.yml

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+name: GalaxyTab
+version: '1.0.0'
+main: xyz.lncvrt.galaxytab.GalaxyTab
+api-version: '1.20'