Java getting certain value from a hashmap

code

   HashMap <String, Integer> polllist = new HashMap<>();
   public boolean onCommand(CommandSender s, Command Cmd, String label, String[] args)
   {

   }

So I made a HashMap containing a String and an Integer. I tried doing this.

    if(polllist.containsValue(args[1]))
    {

    }

This does not seem to work, I put an else statement and that always triggers when I know I put a value in the hashmap that equals args[1]. I am trying to find the integer value but it does not seem to work. How would I also get the string value.