extras/src/main/java/pw/kaboom/extras/modules/player/PlayerTeleport.java

package pw.kaboom.extras.modules.player;

import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerChangedWorldEvent;
import org.bukkit.event.player.PlayerTeleportEvent;

public final class PlayerTeleport implements Listener {
    @EventHandler
    void onPlayerChangedWorld(final PlayerChangedWorldEvent event) {
        final Player player = event.getPlayer();

        if (player.getMaxHealth() <= 0) {
            player.setMaxHealth(Double.POSITIVE_INFINITY);
            player.setHealth(20);
            player.setMaxHealth(20);
        }
    }
}