Java tutorial
import java.util.Arrays; import java.util.List; import java.util.function.Supplier; public class Main { public static void main(String[] args) { Supplier<Employee> employeeGenerator = Main::employeeMaker; for (int i = 0; i < 10; i++) { System.out.println("Employee #" + i + ": " + employeeGenerator.get()); } } public static Employee employeeMaker() { List<String> names = Arrays.asList("John Doe", "Jane Doe", "Mark Twain", "Oliver Twist", "Ferdinand IV"); return new Employee(names.get((int) (Math.random() * names.size())), Math.random() * 20_000); } } class Employee { public String name; public double salary; Employee(String name, double salary) { this.name = name; this.salary = salary; } @Override public String toString() { return name + ": " + salary; } }