Java Stream How to - Create BiFunction to increase salary

Question

We would like to know how to create BiFunction to increase salary.

Answer

/*from   w  w  w.  j  a v a 2 s .  c  om*/
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.function.BiFunction;

public class Main {
   public static void main(String[] args) {
      List<Employee> employees = Arrays.asList(
            new Employee("John", 20_000),
            new Employee("Max", 45_000),
            new Employee("Jane", 11_000)
      );
      BiFunction<Employee, Double, Double> raiser = (e, increase) -> e.salary + ((e.salary < 30_000) ? (e.salary * increase / 100) : 0);
      System.out.println(bimapIt(employees, 10D, raiser));
   }
   public static Map<String, Double> bimapIt(List<Employee> candidates, Double raise, BiFunction<Employee, Double, Double> mapper) {
      Map<String, Double> applied = new HashMap<>();

      for (Employee candidate : candidates) {
         applied.put(candidate.name, mapper.apply(candidate, raise));
      }
      return applied;
   }
}

class Employee {
  public String name;
  public double salary;

  public Employee(String name, double salary) {
     this.name = name;
     this.salary = salary;
  }
}

The code above generates the following result.