Generating Instances of a Class - Java Design Pattern

Java examples for Design Pattern:Factory Pattern

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Introduction

Use the factory method pattern to create instances of the class.

Demo Code

class PlayerFactory {

  public static Player createPlayer() {
    Player returnType = new Player();
    //do other setting if necessary
    return returnType;
  }/*w ww . j  a  v a 2 s .c om*/
}

class Player {

  private String firstName;
  private String lastName;
  private String position;
  private int status = -1;

  public Player() {

  }

  public Player(String position, int status) {
    this.position = position;
    this.status = status;
  }

  protected String playerStatus() {
    String returnValue = null;

    switch (getStatus()) {
    case 0:
      returnValue = "ACTIVE";
    case 1:
      returnValue = "INACTIVE";
    case 2:
      returnValue = "INJURY";
    default:
      returnValue = "ON_BENCH";
    }

    return returnValue;
  }

  public String playerString() {
    return getFirstName() + " " + getLastName() + " - " + getPosition();
  }

  /**
   * @return the firstName
   */
  public String getFirstName() {
    return firstName;
  }

  /**
   * @param firstName
   *          the firstName to set
   */
  public void setFirstName(String firstName) {
    if (firstName.length() > 30) {
      this.firstName = firstName.substring(0, 29);
    } else {
      this.firstName = firstName;
    }
  }

  /**
   * @return the lastName
   */
  public String getLastName() {
    return lastName;
  }

  /**
   * @param lastName
   *          the lastName to set
   */
  public void setLastName(String lastName) {
    this.lastName = lastName;
  }

  /**
   * @return the position
   */
  public String getPosition() {
    return position;
  }

  /**
   * @param position
   *          the position to set
   */
  public void setPosition(String position) {
    this.position = position;
  }

  /**
   * @return the status
   */
  public int getStatus() {
    return status;
  }

  /**
   * @param status
   *          the status to set
   */
  public void setStatus(int status) {
    this.status = status;
  }
}

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