Example of using static factory methods in Java

Person.java

public class Person {

  static int NEXT_ID = 0;

  private String first;
  private String last;
  private int id;

  private Person() {} //prevents instantiation not using "create"

  private Person(String f, String l, int i) {
    first = f;
    last = l;
    id = i;
  }

  public static Person create(String f, String l) {
    return new Person(f, l, NEXT_ID++);
  }

  public String getName() {
    return String.format("%s %s", first, last);
  }

  public int getId() {
    return id;
  }
}