Factory mode (Factory method) (Object-creation mode)

Reference Documentation:

1. Design mode-the basis of reusable object-oriented software

2.http://blog.csdn.net/hguisu/article/details/7505909 (design mode (i) Factory mode factory (created))

Factory mode (Factory method) (Object-creation mode)

Theoretical knowledge, you can refer to the reference document ...

Let's take a look at the structure of factory method:

Code implementation:

The case is an example of a maze built in the book.

Mazegame.java:

Package Com.rick.designpattern.factory_method;
 /** * Created by MyPC on 2017/6/21.

        */public class Mazegame {public Maze Createmaze () {Maze amaze = new Maze ();
        R1 = makeroom (1);

        r2 = Makeroom (2);

        Door Thedoor = Makedoor (r1, r2);
        Amaze.addroom (R1);

        Amaze.addroom (R2);
        R1.setside (Room.Side.North, Makewall ());
        R1.setside (Room.Side.East, Thedoor);
        R1.setside (Room.Side.South, Makewall ());

        R1.setside (Room.Side.West, Makewall ());
        R2.setside (Room.Side.North, Makewall ());
        R2.setside (Room.Side.East, Makewall ());
        R2.setside (Room.Side.South, Makewall ());
        R2.setside (Room.Side.West, Thedoor);
    return amaze;
    } public Maze Makemaze () {return new Maze ();
    } public Makeroom (int n) {return new (n);
    } public Wall Makewall () {return new Wall ();
        } public Door Makedoor (guest r1, R2) {return new Door (R1, r2);
 }
}

Bombedmazegame.java:

Package Com.rick.designpattern.factory_method;

/**
 * Created by MyPC on 2017/6/21.
 *
/public class Bombedmazegame extends Mazegame {

    @Override public
    Wall Makewall () {
        return new Bombedwall ();
    }

    @Override public
    makeroom (int n) {
        return new Roomwithabomb (n);}
}

Enchantedmazegame.java:

Package Com.rick.designpattern.factory_method;

/**
 * Created by MyPC on 2017/6/21.
 *
/public class Enchantedmazegame extends Mazegame {
    private Spell Castspell () {
        return new Spell ();
    }

    @Override public
    makeroom (int n) {
        return new Enchantedroom (n, Castspell ());
    }

    @Override public
    Door Makedoor (hostel r1, guest R2) {
        return new Doorneedingspell (R1, r2);
    }
}

Client.java:

Package Com.rick.designpattern.factory_method;

/**
 * Created by MyPC on 2017/6/21.
 */Public
class Client {public


    static void Main (string[] args) {
        Maze Maze = new Mazegame (). Createmaze (); 
  
   maze maze1 = new Bombedmazegame (). Createmaze ();
        Maze maze2 = new Enchantedmazegame (). Createmaze ();
    }
}
  

The parent class of the Mazegame factory method above, the corresponding Bombedmazegame and Enchantedmazegame are subclasses. There are also client test classes.

Some of the following are the product classes:

Maze.java:

Package Com.rick.designpattern.factory_method;

Import java.util.ArrayList;
Import java.util.List;

/** *
 Maze
 * <p>
 * Created by MyPC on 2017/6/21.
 *
/public class Maze {
    private list<room> rooms = new arraylist<room> ();


    public void Addroom (guest) {
        Rooms.add (guest);
    }




}

Room.java:

Package Com.rick.designpattern.factory_method;

Import Java.util.HashMap;
Import Java.util.Map;

/**
 * Created by MyPC on 2017/6/21.
 */Public
class
    , private int n;
    Private Map<side, object> walls = new Hashmap<side, object> ();

    public (int n) {
        THIS.N = n;
    }

    public void Setside (Side Side, Object o) {
        walls.put (Side, O);
    }

    public enum Side {
        n, East, South, West;
    }
}

Door.java:

Package Com.rick.designpattern.factory_method;

/**
 * Created by MyPC on 2017/6/21.
 */Public
class Door {
    private r1, R2;

    Public Door (R1, r2) {
        this.r1 = r1;
        THIS.R2 = r2;
    }
}

Wall.java:

Package Com.rick.designpattern.factory_method;

/**
 * Created by MyPC on 2017/6/21.
 */Public
class Wall {
}

Bombedwall.java:

Package Com.rick.designpattern.factory_method;

/**
 * Created by MyPC on 2017/6/21.
 */Public
class Bombedwall extends Wall {
}

Doorneedingspell.java:

Package Com.rick.designpattern.factory_method;

/**
 * Created by MyPC on 2017/6/21.
 */Public
class Doorneedingspell extends Door {public

    Doorneedingspell (hostel r1, class R2) {
        super (R1, r2); 
  }
}

Enchantedroom.java:

Package Com.rick.designpattern.factory_method;

/**
 * Created by MyPC on 2017/6/21.
 */Public
class Enchantedroom extends (
    private Spell Spell;

    public enchantedroom (int n, Spell Spell) {
        super (n);
        This.spell = spell;
    }
}

Roomwithabomb.java:

Package Com.rick.designpattern.factory_method;

/**
 * Created by MyPC on 2017/6/21.
 *
/public class Roomwithabomb extends. {Public
    roomwithabomb (int n) {
        super (n);
    }
}

Spell.java:

Package Com.rick.designpattern.factory_method;

/**
 * Created by MyPC on 2017/6/21.
 */Public
class Spell {
}