Hi I have been learning to make plugins and right now I'm trying to make one that if tnt or bedrock is placed by a non op player it disappears. I have my code for it but cannot figure out why it isn't working. Can someone please help please? Code: package me.Septango.firstplugin; import java.util.logging.Logger; import org.bukkit.ChatColor; import org.bukkit.Location; import org.bukkit.command.Command; import org.bukkit.command.CommandSender; import org.bukkit.entity.Player; import org.bukkit.plugin.PluginDescriptionFile; import org.bukkit.plugin.PluginManager; import org.bukkit.plugin.java.JavaPlugin; public class Firstplugin extends JavaPlugin { public final Logger logger = Logger.getLogger("Minecraft"); public static Firstplugin plugin; public final MyBlockListener bl = new MyBlockListener(); public final MyPlayerListener pl = new MyPlayerListener(); @Override public void onDisable() { PluginDescriptionFile pdfFile = this.getDescription(); this.logger.info(pdfFile.getName() + " Has been disabled!"); } @Override public void onEnable() { PluginDescriptionFile pdfFile = this.getDescription(); this.logger.info(pdfFile.getName() + " Version " + pdfFile.getVersion() + " Has been enabled!"); PluginManager pm = getServer().getPluginManager(); pm.registerEvents(this.bl, this); pm.registerEvents(this.pl, this); } public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] args) { Player player = (Player) sender; if (commandLabel.equalsIgnoreCase("heal") || commandLabel.equalsIgnoreCase("h")) { if (args.length == 0) { // heal = 0 args (/heal) player.setHealth(20); player.setFireTicks(0); player.setFoodLevel(20); player.sendMessage(ChatColor.GREEN + "Healed!"); } else if (args.length == 1) { if (player.getServer().getPlayer(args[0]) != null) { Player targetPlayer = player.getServer().getPlayer(args[0]); targetPlayer.setHealth(20); targetPlayer.setFireTicks(0); targetPlayer.setFoodLevel(20); player.sendMessage(ChatColor.GREEN + "Healed!"); } else { player.sendMessage(ChatColor.RED + "That player is not currently online."); } } } else if (commandLabel.equalsIgnoreCase("starve")) { if (args.length == 0) { player.sendMessage(ChatColor.YELLOW + "Please use the format /starve [player]"); } else if (args.length == 1) { if (player.getServer().getPlayer(args[0]) != null) { Player targetPlayer = player.getServer().getPlayer(args[0]); targetPlayer.setFoodLevel(0); } else { player.sendMessage(ChatColor.RED + "That player is not currently online."); } } } else if (commandLabel.equalsIgnoreCase("sp")) { if (args.length == 0) { player.sendMessage(ChatColor.DARK_RED + "Not enough arguements please provide a person."); } else if (args.length == 1) { Player targetPlayer = player.getServer().getPlayer(args[0]); Location targetPlayerLocation = targetPlayer.getLocation(); player.teleport(targetPlayerLocation); } else if (args.length == 1) { Player targetPlayer = player.getServer().getPlayer(args[0]); Player targetPlayer1 = player.getServer().getPlayer(args[1]); Location targetPlayer1Location = targetPlayer1.getLocation(); targetPlayer.teleport(targetPlayer1Location); targetPlayer.sendMessage("You have been teleported to " + player.getDisplayName()); } } return false; } } and here is the block editor class Code: package me.Septango.firstplugin; import org.bukkit.ChatColor; import org.bukkit.Material; import org.bukkit.entity.Player; import org.bukkit.event.EventHandler; import org.bukkit.event.Listener; import org.bukkit.event.block.BlockPlaceEvent; public class MyBlockListener implements Listener { public static Firstplugin plugin; public static Material[] blacklist = { Material.TNT, Material.BEDROCK }; @EventHandler public void onBlockPlace(BlockPlaceEvent event) { Material block = event.getBlock().getType(); Player player = event.getPlayer(); for (Material blocked : blacklist) { if (blocked == block) { if (player.isOp()) { } else { event.getBlock().setType(Material.AIR); player.chat("I just placed " + ChatColor.DARK_RED + blocked); } } } } }