Please see below code for HashMap
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
public class Program2 {
public static void main(String[] args) {
HashMap country_capital = new HashMap();
country_capital.put("India", "Delhi");
country_capital.put("USA", "Washington DC");
country_capital.put("China", "Bejing");
country_capital.put("Russia", "Moscow");
System.out.println(country_capital);
}
}
Explaination
Output –