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

public class MyHashMapKeys {

    public static void main(String a[]){
        HashMap hm = new HashMap();
        //add key-value pair to hashmap
        hm.put("first", "FIRST INSERTED");
        hm.put("second", "SECOND INSERTED");
        hm.put("third","THIRD INSERTED");
        System.out.println(hm);
        Set keys = hm.keySet();
        for(String key: keys){
            System.out.println(key);
        }
    }
}