import java.util.HashMap;
import java.util.Map;

public class Sample {

  public static void main(String[] args) {
    HashMap<String, Integer> map = new HashMap<>();
    map.put("A", 1);
    map.put("B", 2);
    map.put("C", 3);

    for (Map.Entry<String, Integer> entry : map.entrySet()) {
      System.out.println(entry.getKey() + " " + entry.getValue());
      // A 1 , B 2 , C 3
    }
    
    map.forEach((key, value) -> System.out.println(key + " " + value));

  }
}