Java Lambda Expression Example: Comparator

package govind;

public class Employee {

            int empid;

            String empName;

            String empsalary;

            public Employee(int empid, String empName, String empsalary) {

                        super();

                        this.empid = empid;

                        this.empName = empName;

                        this.empsalary = empsalary;

            }}

package govind;

import java.util.ArrayList;

import java.util.Collections;

import java.util.List;

public class EmpMain {

            public static void main(String[] args) {

                        List<Employee> l=new ArrayList<>();

                       

        Employee e1=new Employee(101, "govind", "11000");

        l.add(e1);

        Employee e2=new Employee(102, "sanjeet", "21000");

        l.add(e2);

        Employee e3=new Employee(103, "ajit", "28000");

        l.add(e3);

        Employee e4=new Employee(104, "mani", "45000");

        l.add(e4);

        System.out.println("sorting on the basis of name");

        // implementing lambda expression

        Collections.sort(l, (ep1,ep2)->{

           

            return ep1.empName.compareTo(ep2.empName);

           

        });

         for(Employee e:l)

        {

            System.out.println(e.empName+" "+e.empsalary+" "+e.empid);

       }}}

o/p:----------------

sorting on the basis of name

ajit 28000 103

govind 11000 101

mani 45000 104

sanjeet 21000 102