Java HashMap.keySet()

public Set <K> keySet()

/*  w w  w. jav a  2 s  .  c o m*/
import java.util.HashMap;
import java.util.Set;

public class Main {
   public static void main(String args[]) {
      HashMap<Integer, String> newmap = new HashMap<Integer, String>();      
      
      // populate hash map
      newmap.put(1, "tutorials");
      newmap.put(2, "from");
      newmap.put(3, "java2s.com");
      
      
      // get keyset value from map
      Set keyset=newmap.keySet();
      
      // check key set values
      System.out.println("Key set values are: " + keyset);
   }    
}