Please see below code for Iterating HashMap
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
public class Program2 {
public static void main(String[] args) {
HashMap<String, String> country_capital = new HashMap<String, String>();
country_capital.put("India", "Delhi");
country_capital.put("USA", "Washington DC");
country_capital.put("China", "Bejing");
country_capital.put("Russia", "Moscow");
for (Map.Entry<String, String> set :
country_capital.entrySet()) {
// Printing all elements of a Map
System.out.println(set.getKey() + " = "+ set.getValue());
}
}
}
🧠 Output:
China = Bejing
Russia = Moscow
USA = Washington DC
India = Delhi
⚠️ Note: The order may change every time because HashMap does not maintain insertion order.
🧠 Explanation:
country_capital.entrySet() returns a set of all Map.Entry objects.
Each Map.Entry contains:
.getKey() → the country
.getValue() → the capital
✅ This is the standard way to loop through a HashMap.
If you want to maintain insertion order, you can replace HashMap with LinkedHashMap:
import java.util.LinkedHashMap;
LinkedHashMap<String, String> country_capital = new LinkedHashMap<>();