java map hackerrank solution - Java 15 for explanation watch video : Code: import java.io.*; import java.util.*; public class Solution { public static void main(String[] args) { Scanner scn = new Scanner(System.in); int n = scn.nextInt(); scn.nextLine(); HashMap<String,Integer> hm = new HashMap<>(); for ( int i= 0 ;i<n;i++){ String name = scn.nextLine(); int mobile = scn.nextInt(); scn.nextLine(); hm.put(name,mobile); } while (scn.hasNext()){ String name = scn.nextLine(); if (hm.containsKey(name)){ System.out.println(name+ "=" +hm.get(name)); } else { System.out.println( "Not found" ); } } } }