Java Collector example

 This  example  is  simple  use  of    java 8  collector   class   to  filter  data   easy way.

package Java8;

import java.util.Arrays;

import java.util.List;

import java.util.stream.Collectors;

public class EmpDetails {

            public static void main(String[] args) {

        List employees = Arrays.asList(new Employee(1,1000,"Chandra Shekhar",6000),

                new Employee(1,1000,"Atri ",80000),

                new Employee(1,1004," Bhirgu",90000),

                new Employee(1,1001," Pulstya",120000),

                new Employee(1,1004," Kashyap",85000)

                );

       

        int total = employees.stream()

                .collect(Collectors.summingInt(Employee::getSalary));

       

        int totalSalByDept = employees.stream().

                filter(name-> 1000 == name.getDeptId())

                .collect(Collectors.summingInt(Employee::getSalary));

       

        System.out.println("Total Employees Salary : "+total);

        System.out.println("Total Employees Salary of 1000 Dept : "+totalSalByDept);

    }

   

}

-->

  After   running   this   code   output  will be   like this.

Total Employees Salary : 381000

Total Employees Salary of 1000 Dept : 86000