HackerRank Java- Comparator
Given an array of n Player objects, write a comparator that sorts them in order of decreasing score; if 2 or more players have the same score, sort those players alphabetically by name. To do this, you must create a Checker class that implements the Comparator interface, then write an int compare(Player a, Player b) method implementing the Comparator.compare(T o1, T o2) method.
- import java.util.*;
-
- // Write your Checker class here
-
- class Checker implements Comparator<Player> {
-
- @Override
- public int compare(Player p1, Player p2) {
- if (p1.score == p2.score) {
- return p1.name.compareTo(p2.name);
- } else {
- return p2.score - p1.score;
- }
- }
- }
-
- class Player{
- String name;
- int score;
-
- Player(String name, int score){
- this.name = name;
- this.score = score;
- }
- }
-
- class Solution {
-
- public static void main(String[] args) {
- Scanner scan = new Scanner(System.in);
- int n = scan.nextInt();
-
- Player[] player = new Player[n];
- Checker checker = new Checker();
-
- for(int i = 0; i < n; i++){
- player[i] = new Player(scan.next(), scan.nextInt());
- }
- scan.close();
-
- Arrays.sort(player, checker);
- for(int i = 0; i < player.length; i++){
- System.out.printf("%s %s\n", player[i].name, player[i].score);
- }
- }
- }
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