package datastructure.hashtable; import java.util.HashSet; /** * The type Sub set array. */ public class SubSetArray { /** * Is subset boolean. * * @param arr1 the arr 1 * @param arr2 the arr 2 * @return the boolean */ public static boolean isSubset(int[] arr1, int[] arr2) { HashSet set = new HashSet<>(); for (int i : arr1) set.add(i); for (int i : arr2) if (!set.contains(i)) return false; return true; } /** * Main. * * @param args the args */ public static void main(String args[]) { int arr1[] = {1, 3, 6, 9, 12, 15, 18, 21}; int arr2[] = {6, 12, 18}; System.out.println("Is Subset :: " + isSubset(arr1, arr2)); } }