Online Java Compiler By
JavaTpoint.com
import java.util.*; public class CollectionsNewSetFromMapExample2 { public static void main(String[] args) { Map
map = new IdentityHashMap
(); Set
set = Collections.newSetFromMap(map); set.add(1); set.add(1); set.add(1); // set and map values are System.out.println("Set is: " + set); System.out.println("Map is: " + map); } }
Output