import java.util.*; import java.util.Map.Entry; /* with input "AAA 100\nBBB 200\nCCC 300\n" after Bowling() you get: al: [100, 200, 300] players: {AAA=100, CCC=300, BBB=200} ok but after for() in main() you get: al:[100, 200, 300, 300, 300, 300] al is longer, because the input is "CCC 300" and you add 300 at end of existed al 3x (!) then in getWinner(): if (entry.getValue() == al.get(al.size() -1)) you compare every players.value with 300, all tests are false because you compare Objects and not their values (!) use this instead if (entry.getValue() .equals ( al.get(al.size() -1)) ) { is this answer to your question? */ public class Bowling { public static Scanner sc = new Scanner(System.in); public static String input; public static String[] values; public static int points; public static String name; static ArrayList al = new ArrayList(); static HashMap players; static HashMap playersR; Bowling() { players = new HashMap(); for(int i=0;i<3;i++) { input = sc.nextLine(); values = input.split(" "); name = values[0]; int points = Integer.parseInt(values[1]); al.add(Integer.parseInt(values[1])); addPlayer(name, points); } } public static void addPlayer(String name, int p) { players.put(name, p); } //your code goes here public void getWinner(){ Collections.sort(al); for(Entry entry: players.entrySet()) { if (entry.getValue().equals( al.get(al.size() -1)) ) { System.out.println(entry.getKey()); } } // System.out.println(al.get(al.size()-1)); } public static void main(String[ ] args) { Bowling game = new Bowling(); // playersR=players; //for(int i=0;i al = new ArrayList(); HashMap players; Bowling() { players = new HashMap(); for(int i=0;i<3;i++) { input = sc.nextLine(); values = input.split(" "); String name = values[0]; int points = Integer.parseInt(values[1]); al.add(Integer.parseInt(values[1])); addPlayer(name, points); } } public void addPlayer(String name, int p) { players.put(name, p); } //your code goes here public void getWinner(){ Collections.sort(al); for(Entry entry: players.entrySet()) { if(entry.getValue()==al.get(al.size()-1)) { System.out.println(entry.getKey()); } } } public static void main(String[ ] args) { Bowling game = new Bowling(); game.getWinner(); } } */

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