Blockbreaks handling Class

package me.out.spleef;
import org.bukkit.*;
import org.bukkit.block.Block;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.EventPriority;
import org.bukkit.event.Listener;
import org.bukkit.event.block.BlockDamageEvent;
import org.bukkit.inventory.Inventory;

public class Breakblock implements Listener {
    World world = Bukkit.getWorld("world");
    Location arena = new Location(world, 25, 101, 25);

    @EventHandler(priority = EventPriority.HIGH)
    public void onPlayerBreakBlock(BlockDamageEvent event){
        Block blockBraking = event.getBlock();
        if(blockBraking.getType() == Material.SNOW_BLOCK){
            if(blockBraking.getLocation().getBlockX() > 0 &&
                    blockBraking.getLocation().getBlockX() < 50 &&
                    blockBraking.getLocation().getBlockY() == 100 &&
                    blockBraking.getLocation().getBlockZ() > 0 &&
                    blockBraking.getLocation().getBlockX() < 50) {
                if(event.getItemInHand().equals(Spleef.shovel)){
                    blockBraking.setType(Material.VOID_AIR);
                    event.setCancelled(true);
                }else{
                    event.setCancelled(true);
                }
            }
        }else{
            event.setCancelled(true);
        }
        if(event.getBlock().getType().equals(Material.DARK_OAK_SIGN)){
            if(event.getBlock().getLocation().getBlockX() > 99999 &&
                    event.getBlock().getLocation().getBlockX() < 100001 &&
                    event.getBlock().getLocation().getBlockY() > 140 &&
                    event.getBlock().getLocation().getBlockY() < 142 &&
                    event.getBlock().getLocation().getBlockZ() > 100002 &&
                    event.getBlock().getLocation().getBlockZ() < 100004){
                Player p = event.getPlayer();
                Spleef.Players.add(p.getName());
                p.teleport(arena);
                Inventory inv = p.getPlayer().getInventory();
                inv.clear();
                inv.setItem(0, Spleef.shovel);
                event.setCancelled(true);
            }
        }
    }
    public void breakingParticle(BlockDamageEvent e, Particle p){
        double x, y, z;
        for(x = -0.334; x < 0.7;){
            for(y = -0.334; y < 0.7;){
                for(z = -0.334; z < 0.7;){
                    e.getPlayer().spawnParticle(p, e.getBlock().getLocation().add(x, 1, z), 10);
                    z = z + 0.334;
                }
                y = y + 0.334;
            }
            x = x + 0.334;
        }
    }
}