Using Comparator to specify custom sorting - 2

comparator.java

// Check this also https://gist.github.com/anil477/da64f09ddd9323c9858f86eaffe9610b

import java.util.*;

class Employee implements Comparable<Employee> {
    private String name;
    private int age;
    private int salary;
 
    public Employee(String name, int age, int salary) {
        this.name = name;
        this.age = age;
        this.salary = salary;
    }
    
    @Override
    public int compareTo(Employee employee) {
        return employee.salary - this.salary;
    }
    
    public String toString() {
        return String.format("(%s, %d, %d)", name, age, salary);
    }
}

class Test{
    
    public static void main(String[] args){
        
        ArrayList<Employee> list = new ArrayList<Employee>();
        
        list.add(new Employee("Anil", 26, 1234));
        list.add(new Employee("Sunil", 21, 123));
        list.add(new Employee("Arch", 20, 533));
        
        
        System.out.println("Before sorting: " + list);
        Collections.sort(list);
        System.out.println("After sorting: "  + list);
    } 
}