SignJoin

public class SignJoinJoin extends PluginListener
{
      int i;
  public boolean onSignChange(Player player, Sign sign)
  {
    Block b = sign.getBlock();
    World world = player.getWorld();
    if ((sign.getText(0).equals("[Join]")) &&
      (player.canUseCommand("/signadmin"))) {
      sign.setText(0, "[Join]");
      if (sign.getText(1).isEmpty()) sign.setText(1, "§4White List");
      if (sign.getText(2).isEmpty()) sign.setText(2, "§4add to Group:");
      if (sign.getText(3).isEmpty()) sign.setText(3, "default");
      player.sendMessage("§2Sign sucsessfully created.");
      return false;
    }

    if (sign.getText(0).equals("[Caste]")) {
      if ((!player.canUseCommand("/signadmin")) ||
        (sign.getText(1).isEmpty())) { player.notify("You have to fill in an group on line 2"); world.setBlockAt(0, sign.getX(), sign.getY(), sign.getZ()); world.dropItem(b.getLocation(), 323); return true; }
      if (!etc.getDataSource().doesGroupExist(sign.getText(1))) { player.notify("The group on line 2 does not exist"); world.setBlockAt(0, sign.getX(), sign.getY(), sign.getZ()); world.dropItem(b.getLocation(), 323); return true; }
      if (sign.getText(2).isEmpty()) { player.notify("You have to fill in an group on line 3"); world.setBlockAt(0, sign.getX(), sign.getY(), sign.getZ()); world.dropItem(b.getLocation(), 323); return true; }
      if (!etc.getDataSource().doesGroupExist(sign.getText(2))) { player.notify("The group on line 3 does not exist"); world.setBlockAt(0, sign.getX(), sign.getY(), sign.getZ()); world.dropItem(b.getLocation(), 323); return true; }
      if (sign.getText(3).isEmpty()) { player.notify("You have to fill in an price on line 4"); world.setBlockAt(0, sign.getX(), sign.getY(), sign.getZ()); world.dropItem(b.getLocation(), 323); return true; } try {
        Double.parseDouble(sign.getText(3)); } catch (NumberFormatException nfe) { player.notify("Line 4 must be an number!"); world.setBlockAt(0, sign.getX(), sign.getY(), sign.getZ()); world.dropItem(b.getLocation(), 323); return true; }
      player.sendMessage("§2Sign sucsessfully created.");
      return false;
    }
    return false;
  }
  public boolean onBlockRightClick(Player player, Block bc, Item iih) {
    if ((bc.getType() == 63) || (bc.getType() == 68)) {
      Sign sign = (Sign)bc.getWorld().getComplexBlock(bc.getX(), bc.getY(), bc.getZ());
      if (sign.getText(0).equalsIgnoreCase("[Join]")) {
        if (player.canUseCommand("/signjoin")) {
          if (!etc.getDataSource().isUserOnWhitelist(player.getName())) {
            if ((player.getGroups()[0].equals("default")) || (player.getGroups()[0].equals("guest"))) {
              player.setGroups(new String[] { sign.getText(3) });
              etc.getDataSource().modifyPlayer(player);
              etc.getDataSource().addToWhitelist(player.getName());
              player.sendMessage("§2Your added to the whitelist and modified.");
              return false;
            }

            player.notify("You are already modified.");
            return true;
          }

          player.notify("You are already on the whitelist");
        }
        else {
          player.notify("You are not allowed to preform this command");
          return true;
        }
      }
      if (sign.getText(0).equals("[Caste]")) {
        if (sign.getText(1).equals(player.getGroups()[0])) {
          double money = ((Double)etc.getLoader().callCustomHook("dCBalance", new Object[] { "Player-Balance", player.getName() })).doubleValue();
          if (money < Double.parseDouble(sign.getText(3))) { player.notify("You dont have enough money to preform this action"); return true; }
          player.setGroups(new String[] { sign.getText(2) });
          etc.getDataSource().modifyPlayer(player);
          etc.getLoader().callCustomHook("dCBalance", new Object[] { "Player-Charge", player.getName(), Double.valueOf(Double.parseDouble(sign.getText(3))) });
          //newcode
          char[] c = sign.getText(2).toCharArray();
          while(!isNumber(c[i])){
              i++;
          }
          player.chat("/teach"+c[i]+" "+player.getName()+" PASS");
          //newcode
          player.sendMessage("§2You Changed from caste");
          return false;
        }
        player.notify("You can not change from your current caste to this caste");
        return true;
      }

    }

    return false;
  }
  public boolean isNumber(char c){try{Integer.parseInt(c+"");}catch(NumberFormatException nfe){return false;}
return true;}
}