/**
 * A collection of people.
 */
public class People 
  implements java.io.Serializable
{
  Person[] members;
  int size;

  public People() {
    
  }

  public void add(Person p) {
    if (this.members == null) {
      this.members = new Person[10];
      this.size = 0;
    }
    else if (this.members.length == this.size) {
      Person[] newmembers = new Person[2*this.members.length];
      for (int i = 0; i < this.size; i++) {
        newmembers[i] = this.members[i];
      }
      this.members = newmembers;
    }
    this.members[this.size++] = p;
  }
   
  public String toString() {
    String result = "";
    if (this.size > 0) {
      result += this.members[0];
      for (int i = 1; i < this.size; i++) {
        result += ", " + this.members[i];
      } // for
    } // if
    return result;
  }  // toString()
} // class People