import cn.nukkit.event.block.BlockSpreadEvent; //导入依赖的package包/类
@Override
public int onUpdate(int type) {
    if (type == Level.BLOCK_UPDATE_RANDOM) {
        //TODO: light levels
        NukkitRandom random = new NukkitRandom();
        x = random.nextRange((int) x - 1, (int) x + 1);
        y = random.nextRange((int) y - 1, (int) y + 1);
        z = random.nextRange((int) z - 1, (int) z + 1);
        Block block = this.getLevel().getBlock(new Vector3(x, y, z));
        if (block.getId() == Block.DIRT) {
            if (block.up() instanceof BlockTransparent) {
                BlockSpreadEvent ev = new BlockSpreadEvent(block, this, new BlockMycelium());
                Server.getInstance().getPluginManager().callEvent(ev);
                if (!ev.isCancelled()) {
                    this.getLevel().setBlock(block, ev.getNewState());
                }
            }
        }
    }
    return 0;
}
 

import cn.nukkit.event.block.BlockSpreadEvent; //导入依赖的package包/类
@Override
public int onUpdate(int type) {
    if (type == Level.BLOCK_UPDATE_RANDOM) {
        //TODO: light levels
        NukkitRandom random = new NukkitRandom();
        x = random.nextRange((int) x - 1, (int) x + 1);
        y = random.nextRange((int) y - 1, (int) y + 1);
        z = random.nextRange((int) z - 1, (int) z + 1);
        Block block = this.getLevel().getBlock(new Vector3(x, y, z));
        if (block.getId() == Block.DIRT) {
            if (block.getSide(1) instanceof BlockTransparent) {
                BlockSpreadEvent ev = new BlockSpreadEvent(block, this, new BlockMycelium());
                Server.getInstance().getPluginManager().callEvent(ev);
                if (!ev.isCancelled()) {
                    this.getLevel().setBlock(block, ev.getNewState());
                }
            }
        }
    }
    return 0;
}
 

import cn.nukkit.event.block.BlockSpreadEvent; //导入依赖的package包/类
@EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
public void onBlockSpread(BlockSpreadEvent event) {
    Block block = event.getBlock();
    Location location = NukkitUtil.getLocation(block.getLocation());
    if (location.isPlotRoad()) {
        event.setCancelled(true);
        return;
    }
    PlotArea area = location.getPlotArea();
    if (area == null) {
        return;
    }
    Plot plot = area.getOwnedPlot(location);
    if (plot == null) {
        return;
    }
    Block source = event.getSource();
    switch (source.getId()) {
        case 2:
            if (Flags.GRASS_GROW.isFalse(plot)) {
                event.setCancelled(true);
            }
            break;
        case 110:
            if (Flags.MYCEL_GROW.isFalse(plot)) {
                event.setCancelled(true);
            }
            break;
        case 106:
            if (Flags.VINE_GROW.isFalse(plot)) {
                event.setCancelled(true);
            }
            break;
    }
}