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StreamsDemo.java
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70 lines (63 loc) · 1.62 KB
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import java.util.ArrayList;
class Employee
{
private int id;
private String name;
private double salary;
Employee(int id , String name, double salary){
this.id = id;
this.name = name;
this.salary = salary;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public double getSalary() {
return salary;
}
public void setSalary(double salary) {
this.salary = salary;
}
@Override
public String toString() {
return "Employee [id=" + id + ", name=" + name + ", salary=" + salary + "]";
}
}
public class StreamsDemo {
public static void main(String[] args) {
// TODO Auto-generated method stub
ArrayList<Employee> empList = new ArrayList<>();
empList.add(new Employee(1001,"Ram",19999));
empList.add(new Employee(1002,"Sim",29999));
empList.add(new Employee(1003,"Rim",39999));
empList.add(new Employee(1004,"Kim",59999));
empList.add(new Employee(1005,"Tim",79999));
empList.add(new Employee(1006,"Shyam",99999));
double sum = 0.0;
// Old Way
// for(Employee emp : empList){
// if(emp.getSalary()>20000){
// sum = sum + emp.getSalary();
// }
// }
// System.out.println("Sum is "+sum);
// Java 8 Stream
// double totalSum = empList.stream()
// .filter((e)->e.getSalary()>20000)
// .mapToDouble((x)->x.getSalary()).sum();
// System.out.println("Total Sum is "+totalSum);
double totalSum = empList.parallelStream()
.filter((e)->e.getSalary()>20000)
.mapToDouble((x)->x.getSalary()).sum();
System.out.println("Total Sum is "+totalSum);
}
}