Monday , January 22 2018
most suggested
Home / java8 / How to calculate Employees Salaries Java 8 summingInt

# How to calculate Employees Salaries Java 8 summingInt

In this tutorials, I am going to show you how to calculate the total salaries of employees using Java 8 summingInt.

## Java 8 summingInt :

summingInt(ToIntFunction<? super T> mapper) is method in Collector class. It produces the sum of a integer-valued function applied to the input elements.

Like summingInt(), summingLong(ToLongFunction<? super T> mapper) also a method in same Collector class. It produces the sum of a long-valued function applied to the input elements.

Here is the example to calculate the sum of salaries of employees.

Employee.java

```
class Employee{
private int id;
private int deptId;
private String name;
private int salary;

public Employee(int id, int deptId, String name, int salary) {
super();
this.id = id;
this.deptId = deptId;
this.name = name;
this.salary = salary;
}
public int getId() {
return id;
}
public String getName() {
return name;
}
public int getSalary() {
return salary;
}
public int getDeptId() {
return deptId;
}

}

```

Calculating the summingInt on Employees salary.

```
package com.onlinetutorialspoint.java8;

import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

public class Java8_SummingInt {
public static void main(String[] args) {
List<Employee> employees = Arrays.asList(new Employee(1, 1000,
"Chandra Shekhar", 6000),
new Employee(1, 1000, "Rajesh", 8000), new Employee(1, 1004,
"Rahul", 9000), new Employee(1, 1001, "Suresh", 12000),
new Employee(1, 1004, "Satosh", 8500));

int total = employees.stream().collect(
Collectors.summingInt(Employee::getSalary));
System.out.println("Total Employees Salary : " + total);
}

}

```

Total Employees Salary : 43500

## Calculate the Sum by Dept :

We can also calculate the sum of salaries by filtering the department ids by using Stream filters in Java 8.

```
package com.onlinetutorialspoint.java8;

import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

public class Java8_SummingInt {
public static void main(String[] args) {
List<Employee> employees = Arrays.asList(new Employee(1,1000,"Chandra Shekhar",6000),
new Employee(1,1000,"Rajesh",8000),
new Employee(1,1004,"Rahul",9000),
new Employee(1,1001,"Suresh",12000),
new Employee(1,1004,"Satosh",8500)
);

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);
}

}
```

Total Employees Salary : 43500
Total Employees Salary of 1000 Dept : 14000

Happy Learning 🙂

Hi
Folks,
you have reach this so far, that shows you like what you are learning. Then why don’t you support us to improve for bettor tutorials by leaving your valuable comments and why not you keep in touch with us for latest updates on your favorite blog @ facebook , twitter , Or Google+ ,

## Java how to convert ArrayList to Array Example

In this tutorial, I am going to show you how to convert Java ArrayList to …

### One comment

1. Pingback: Milana Travis