HurtEntitiesTester plugin source

Main.java

package hetester;

import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.FallingBlock;
import org.bukkit.entity.Player;
import org.bukkit.plugin.java.JavaPlugin;

public class Main extends JavaPlugin {
    @Override
    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
        if (args.length <= 0) {
            return false;
        }
        
        if ((sender instanceof Player) && args[0].equalsIgnoreCase("hurt")) {
            Player pl = (Player) sender;
            Location loc = pl.getLocation();
            loc.setY(loc.getY() + 5.0D);
            FallingBlock anvil = pl.getWorld().spawnFallingBlock(loc, Material.ANVIL, (byte) 0);
            anvil.setDamageEntities(true);
        }
        
        if ((sender instanceof Player) && args[0].equalsIgnoreCase("nohurt")) {
            Player pl = (Player) sender;
            Location loc = pl.getLocation();
            loc.setY(loc.getY() + 5.0D);
            FallingBlock anvil = pl.getWorld().spawnFallingBlock(loc, Material.ANVIL, (byte) 0);
        }
        
        return true;
    }
}