package com.drc.java8.stream.practice;
import com.drc.java8.stream.practice.domain.Person2;
import org.junit.Test;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.List;
public class ListPersonPractice {
// Investors gathering
List<Person> PersonList = new ArrayList<>();
// Initialize the investor
{
PersonList.add(new Person2("Zhang San", 11, BigDecimal.valueOf(10000), BigDecimal.valueOf(0.08)));
PersonList.add(new Person2("Li Si", 21, BigDecimal.valueOf(20000), BigDecimal.valueOf(0.18)));
PersonList.add(new Person2("Wang Wu", 31, BigDecimal.valueOf(30000), BigDecimal.valueOf(0.28)));
PersonList.add(new Person2("Zhao Si", 41, BigDecimal.valueOf(40000), BigDecimal.valueOf(0.38)));
}
/**
* calculate
*/
@Test
public void testCalcAgeAndMoney() {
// Calculate the sum of ages
Integer ages = PersonList.stream().map(Person::getAge).reduce((a, b) -> (a + b)).get();
System.out.println(ages);
// money is an asset, rateOfReturn is the annual rate of return of assets, calculate the total assets of several people after one year
BigDecimal assetsAmt = PersonList.stream().map(person ->
person.getMoney().multiply(person.getRateOfReturn().add(BigDecimal.ONE))).reduce(BigDecimal::add).get();
System.out.println(assetsAmt);
}
}
