Java – type iterator The next () method returns to the character class

I tried to display the contents of the following HashMap:

HashMap<Character,Integer> hm = new HashMap<Character,Integer>();

I print out content using the following methods:

Set hmset = hm.entrySet();
Iterator iterator = hmset.iterator();
while(iterator.hasNext())
    {
    Character key = new Character(iterator.next());
    Sy@R_404_2354@.out.println("key : "+key+"value : "+(Integer)hm.get(key));
}

I received the following error:

error: constructor Character in class Character cannot be applied to given types;

I also tried the following type conversions:

Character key = (Character)iterator.next();

But that won't work Any help would be appreciated thank you..

Solution

Parameterize your iterator and use the keyset:

Iterator<Character> iterator = hm.keySet().iterator();

explain

>Iterator is a generic type and should be parameterized In this way, you can call next. > Calling entryset will return set < entry < character, integer > >. If you are iterating keys, it will make your life more complex