Get keys from HashMap in Java

Question

I have a Hashmap in Java like this:

private Map team1 = new HashMap();

Then I fill it like th

Answer 1

To get keys in HashMap, We have keySet() method which is present in java.util.Hashmap package. ex :

Map map = new Hashmap();
map.put("key1","value1");
map.put("key2","value2");

// Now to get keys we can use keySet() on map object
Set keys = map.keySet();

Now keys will have your all keys available in map. ex: [key1,key2]