HashMap chars = player.getAccountChars();

if (chars.size() < 1)
{
     player.sendPacket(new ActionFailed());
     return;
}

for (Iterator<Integer> iter = chars.keySet().iterator(); iter.hasNext();)
{
     Integer objId = iter.next();
     String charName = (String)chars.get(objId);
     ... rest of the code ...
}