import cn.nukkit.event.player.PlayerInteractEvent.Action; //导入依赖的package包/类
public void fall(float fallDistance) {
    float damage = (float) Math.floor(fallDistance - 3 - (this.hasEffect(Effect.JUMP) ? this.getEffect(Effect.JUMP).getAmplifier() + 1 : 0));
    if (damage > 0) {
        this.attack(new EntityDamageEvent(this, DamageCause.FALL, damage));
    }

    if (fallDistance > 0.75) {
        BlockVector3 v = new BlockVector3(getFloorX(), getFloorY() - 1, getFloorZ());
        int down = this.level.getBlockIdAt(v.x, v.y, v.z);

        if (down == Item.FARMLAND) {
            if (this instanceof Player) {
                Player p = (Player) this;
                PlayerInteractEvent ev = new PlayerInteractEvent(p, p.getInventory().getItemInHand(), this.temporalVector.setComponents(v.x, v.y, v.z), null, Action.PHYSICAL);
                this.server.getPluginManager().callEvent(ev);
                if (ev.isCancelled()) {
                    return;
                }
            }
            this.level.setBlock(this.temporalVector.setComponents(v.x, v.y, v.z), new BlockDirt(), true, true);
        }
    }
}
 

import cn.nukkit.event.player.PlayerInteractEvent.Action; //导入依赖的package包/类
public void fall(float fallDistance) {
    float damage = (float) Math.floor(fallDistance - 3 - (this.hasEffect(Effect.JUMP) ? this.getEffect(Effect.JUMP).getAmplifier() + 1 : 0));
    if (damage > 0) {
        this.attack(new EntityDamageEvent(this, DamageCause.FALL, damage));
    }

    if (fallDistance > 0.75) {
        Block down = this.level.getBlock(this.floor().down());

        if (down.getId() == Item.FARMLAND) {
            if (this instanceof Player) {
                Player p = (Player) this;
                PlayerInteractEvent ev = new PlayerInteractEvent(p, p.getInventory().getItemInHand(), down, null, Action.PHYSICAL);
                this.server.getPluginManager().callEvent(ev);
                if (ev.isCancelled()) {
                    return;
                }
            }
            this.level.setBlock(down, new BlockDirt(), true, true);
        }
    }
}