Constructor question?

Question

I am working on a class called Firm and it has an array of employee objects as its data field. Its constructor has an array of employee objects as its parameter: it initializes the data field array by copying references from the parameter array in a loop. Its main method creates one or two HourlyEmployee objects and one or more exemptEmployee objects. Then it calls setPay for one HourlyEmployee object and one ExemptEmployee objects and prints the results. Then it calls methods setPay and toString for these two objects (calling println, annotate this part of processing so that the output is readable).
What I have so far is, Employee being an abstract class that has a Constructor, and methods setPay(), getPay(), and toString. Subclasses HourlyEmployee and ExemptEmployee each with their own constructors and methods getPay() and setPay() along with toString() methods.
Currently this is what I have for code for my Firm class:
public class Firm
private Employee[] empObj;
Firm(Emp[] empObj)
for(int i = 0;i<empObj.length;++i)
arrObj=empObj;
}Does my constructor have an array of employee objects as its parameters? Do I need to create an Object array[] arrObj?

Answer 1

if Firm's constructor is being passed an Employee array, then just save that reference.
public class Firm
  private Employee[] empObj;
  public Firm(Emp[] empObj)
    this.empObj = empObj;
}Alternatively, you may wish to copy the parameter so that changes to the original (made outside by the guy who passed it to you, for example) don't affect it. In that case, change Firm's constructor to do this:
this.empObj = new Employee[empObj.length];
for (int i = 0; i < empObj.length; ++i)
  this.empObj[i] = empObj;
// or, you may even want to "deep-copy" it like this, if you created
// a "copy-constructor" or "clone" method:
this.empObj[i] = new Employee(empObj[i]);
//or
this.empObj[i] = (Employee) empObj[i].clone();