Java Stream Example : Convert List into Map

package conversionlist;

public class Employee {

               

                int eid;

                String ename;

                float esalary;

                public Employee(int eid, String ename, float esalary) {

                                super();

                                this.eid = eid;

                                this.ename = ename;

                                this.esalary = esalary;

                }

                }

package conversionlist;

import java.util.ArrayList;

import java.util.List;

import java.util.Map;

import java.util.stream.Collectors;

import java.util.stream.Stream;

class EmployeeMain {

               

                public static void main(String[] args) {

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

                                Employee e1=new Employee(101, "govind", 18000.00f);

                                Employee e2=new Employee(102, "ajit", 55000.00f);

                                Employee e3=new Employee(103, "mani", 46000.00f);

                                Employee e4=new Employee(104, "dinesh", 16000.00f);

                                Employee e5=new Employee(105, "rajan", 48000.00f);

                                l.add(e1);

                                l.add(e2);

                                l.add(e3);

                                l.add(e4);

                                l.add(e5);

                               

                                Map<Integer,String> m = l.stream()

                                                                .collect(Collectors.toMap(e->e.eid, e->e.ename));

                                System.out.println(m);

                               

                }

}

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

{101=govind, 102=ajit, 103=mani, 104=dinesh, 105=rajan}