Help with constructor

[Taheerah Nasai]

If I have a
constructor: public Persons(Person[] aList, int aSize) & a
field: private Person[] personList;

how can I 1. Form a Person array of length aSize and put the address of this array into personList. 2. Then use the constructor to copy the first aSize persons from aList onto the newly created array.

[Michael Dunn]

see if you can follow along with this
(I scrapped 'aSize' in the constructor)

class Testing
{
  public Testing()
  {
    Person[] p = {new Person("Fred"),new Person("Joe"),new Person("Mary")};
    new Persons(p).printPersons();
  }
  public static void main (String[] args) {new Testing();}
}
class Persons
{
  private Person[] personList;
  public Persons(Person[] aList)
  {
    personList = aList;
  }
  public void printPersons()
  {
    for(int x = 0; x < personList.length; x++)
    {
      System.out.println(personList[x].name);
    }
  }
}
class Person
{
  String name;
  public Person(String n)
  {
    name = n;
  }
}

[David Harkness]

You can create an array using the new operator, just like classes:

int[] daysPerMonth = new int[12];

This creates an array of twelve ints, each initialized to the default value zero. You can use System.arraycopy() to copy a range of values from one array to another.