Cancelling all damage an entity takes.

1. Create a new file

   • Directorycom/learnpaperdev/beginner

     • BeginnerPlugin.java
     • BlockBreakListener.java
     • EntityDamageListener.java

2. Fill EntityDamageListener.java:

   EntityDamageListener.java

   6 collapsed lines
   package com.learnpaperdev.beginner;
   
   import org.bukkit.event.EventHandler;
   import org.bukkit.event.Listener;
   import org.bukkit.event.entity.EntityDamageEvent;
   import org.jspecify.annotations.NullMarked;
   
   @NullMarked
   public final class PlayerDamageListener implements Listener {
   
       @EventHandler
       void onPlayerTakeDamage(EntityDamageEvent event) {
           event.setCancelled(true);
       }
   }

3. Register listener in main class:

   BeginnerPlugin.java

   @Override
   public void onEnable() {
       // We use a PluginManager in order to register events
       final PluginManager pluginManager = getServer().getPluginManager();
   
       // Create our listener instance
       final BlockBreakListener listener = new BlockBreakListener(getComponentLogger());
       final PlayerDamageListener damageListener = new PlayerDamageListener();
   
       // #registerEvents requires the listener we want to register, and our plugin instance
       pluginManager.registerEvents(listener, this);
       pluginManager.registerEvents(damageListener, this);
   
       getComponentLogger().warn("Our plugin has been enabled!");
   }

4. Test it by trying to take damage.