Java tutorial
import java.util.EnumMap; enum Tutorial { CSS, Python, PHP, Java, Javascript }; public class Main { public static void main(String[] args) { EnumMap<Tutorial, String> map = new EnumMap<Tutorial, String>(Tutorial.class); map.put(Tutorial.CSS, "1"); map.put(Tutorial.Python, "2"); map.put(Tutorial.PHP, "3"); map.put(Tutorial.Java, "4"); System.out.println(map.hashCode()); map.clear(); System.out.println(map.hashCode()); } }