如何将抽象 Class 中的列表传递给另一个 class？

Question

Employee is my abstract class and it has FixedPosition as a daughter class. Company has a method called addEmployee() that must receive a type Employee and then add the List from Employee to its own List.

Company company = new Company("Hi");
List<Employee> employees = new ArrayList<>();

Later I fill up my List but I don't know how to send a type Employee into the method from Company.

employees.add(new FixedPosition(name, occupation, salary, monthsContract));
company.addEmployee();

Answer 1

Your method addEmployee() has no argument. Rewrite it so that it gets an employee object solves your problem.

public void addEmployee( Employee e ) {
    this.employees.add(e);
}

Your company class should have the list of employees.

Answer 2

It seems that you need to overload method addEmployee in your Company class to support handling of an employee list:

public void addEmployee(List<Employee> employees) {
    this.employees.addAll(employees);
}

Or you can call existing Company method with a single employee in a loop:

employees.forEach(company::addEmployee);