Compare Objects using Comparator

Compare Students based on there score. If score is equal , then sort those students based on there name.

import java.util.Arrays;

import java.util.Comparator;

class Student {

   String name;

   int score;

   public Student(String name, int score) {

      super();

      this.name = name;

      this.score = score;

   }

   public String getName() {

      return name;

   }

   public void setName(String name) {

      this.name = name;

   }

   public int getScore() {

      return score;

   }

   public void setScore(int score) {

      this.score = score;

   }

}

public class SortStudents implements Comparator<Student> {

   public static void main(String[] args) {

      Student[] students = new Student[5];

      students[0] = new Student("Paras", 100);

      students[1] = new Student("Varun", 200);

      students[2] = new Student("Rahul", 300);

      students[3] = new Student("Parul", 400);

      students[4] = new Student("Shubham", 100);

      Arrays.sort(students, new SortStudents());

      printArray(students);

   }

  

   static void printArray(Student[] students){

      for(Student s: students){

         System.out.println("Name: "+ s.getName()

         +" Score: "+ s.getScore());

      }

   }

  

   /*Sort students based on score and if score equals

    *then sort using names

    **/

   public int compare(Student s1, Student s2) {

      if(s1.getScore()==s2.getScore())

         return s2.getName().compareTo(s1.getName());

      else

         return s2.getScore()-s1.getScore();

   }

}

Output

Name: Parul   Score: 400

Name: Rahul   Score: 300

Name: Varun   Score: 200

Name: Shubham Score: 100

Name: Paras   Score: 100