Issues with pdfFile.getVersion()

When I wrote /broadcast info, it shows me:
Information:
Error
Error
Error

Code:

else if ((args[0].equalsIgnoreCase("info"))) {
            sender.sendMessage (ChatColor.DARK_PURPLE + "Information:");
            sender.sendMessage (ChatColor.LIGHT_PURPLE + "Plugin" + "Name:" +  pdfFile.getName());
            sender.sendMessage (ChatColor.LIGHT_PURPLE + "Current" + "Version:" + pdfFile.getVersion());
            sender.sendMessage (ChatColor.LIGHT_PURPLE + "Author:" +  pdfFile.getAuthors());
            }
           }
        return true;
      }
    private PluginDescriptionFile getDescription() {
        return null;
    }
}

Is there any problem?
In the other side, I added

Code:

import org.bukkit.plugin.PluginDescriptionFile;

Still looking for help!
@CaiusTSM

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Can you post how you initialized your pdfFile variable?

 

Code:

package net.nubpro.project.plugin.TagYourName;

import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.plugin.PluginDescriptionFile;
import org.bukkit.util.config.Configuration;

public class Data implements CommandExecutor
{
    PluginDescriptionFile pdfFile = getDescription();
    private Announce plugin;
    public Data(Announce broadcast)
      {
        this.plugin = broadcast;
      }

      public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
        String commandName = command.getName().toLowerCase();
        Configuration config = this.plugin.load();
        if ((sender instanceof Player)) {
          if (commandName.equalsIgnoreCase("broadcast"));}
        {
              if (args.length == 0) {
              sender.sendMessage (ChatColor.LIGHT_PURPLE + "  Broadcast Custom v0.1 Commands:");
              sender.sendMessage(ChatColor.AQUA + "/broadcast send" + ChatColor.DARK_AQUA + " - Sends new announcement");
              sender.sendMessage(ChatColor.AQUA + "/broadcast tag <InsertTag>" + ChatColor.DARK_AQUA + " - Set new tag name");
            }
            else if ((args.length > 1) && (args[0].equalsIgnoreCase("send"))) {
              {
                String fullMessage = "";
                for (int i = 1; i < args.length; i++) {
                  fullMessage = fullMessage + " " + args[i];
                }
                String tagName = config.getProperty("tagname").toString();
                sender.getServer().broadcastMessage( "[" + tagName + "]" + fullMessage);
              }
            }else if ((args.length == 2) && (args[0].equalsIgnoreCase("tag"))) {
              config.setProperty("tagname", args[1]);
              config.save();
              sender.sendMessage(ChatColor.GOLD + "Tag Name has been changed to: " + args[1]);
              this.plugin.load();
            }
            else if ((args[0].equalsIgnoreCase("info"))) {
            sender.sendMessage (ChatColor.DARK_PURPLE + "Information:");
            sender.sendMessage (ChatColor.LIGHT_PURPLE + "Plugin" + "Name:" +  pdfFile.getName());
            sender.sendMessage (ChatColor.LIGHT_PURPLE + "Current" + "Version:" + pdfFile.getVersion());
            sender.sendMessage (ChatColor.LIGHT_PURPLE + "Author:" +  pdfFile.getAuthors());
            }
           }
        return true;
      }
    private PluginDescriptionFile getDescription() {
        return null;
    }
}

Hope nothing goes wrong, but I will try to fix it.