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  1. Prepare
  2. Java
  3. Data Structures
  4. Java Comparator
  5. Discussions

Java Comparator

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282 Discussions

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  • WebsterJanice1
     + 0 comments

    This is a great exercise for understanding how custom sorting works using comparators! Betinexchange247 Login

  • StoneSnake
     + 0 comments
    class Checker implements Comparator<Player>{
    @Override
    public int compare(Player o1, Player o2) {
        if (o1.score != o2.score)
            return Integer.compare(o2.score, o1.score);
        else 
            return o1.name.compareTo(o2.name);
    }
 }

  • abdessamadelmah2
     + 0 comments

    import java.io.; import java.util.; import java.util.List;

    public class Solution {

    public static void main(String[] args) {

    var players = new ArrayList<Players>();
    Scanner sc = new Scanner(System.in);

    int nums = Integer.parseInt(sc.nextLine());





    while(nums > 0)
    {
        String[] input = sc.nextLine().trim().split("\\s+");
        players.add(new Players(input[0], Integer.parseInt(input[1])));
        nums--;



    }

    Collections.sort(players, (p1, p2) -> {
        int result = Integer.compare(((Players) p2).getScore(), ((Players) p1).getScore());
        if (result == 0)
        {
            return ((Players) p1).getName().compareTo(((Players) p2).getName());
        }
        return result;
    });
    for (Players p : players) {
        System.out.println(p);
    }
    sc.close();

}

    }

    class Players {

    private String name;
private int score;


public Players(String name, int score)
{
    this.name = name;
    this.score = score;
}

public void setName(String name)
{this.name = name;}

public String getName()
{return this.name;}

public void setScore(int score)
{this.score = score;}

public int getScore()
{return this.score;}

public String toString()
{return this.name + " " + this.score;}

    }

  • sumit_next21
     + 0 comments
    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 if (p1.score< p2.score) {
            return 1;
        }else {
            return -1;
        }
    }
}

  • ShanaVilla34
     + 0 comments

    This is a great exercise for learning how to implement comparators in Java! exchange play