Question

我想使用Factory模式制作一个新方法addShip，它在运行时确定要初始化的Ship类型。

    while(!g.allShipsPlaced())
    {
        NumberGenerator gen = new NumberGenerator();
        int x = gen.rand(10);
        int y = gen.rand(10);
        int o = gen.rand(1);

        x = gen.rand(10);
        y = gen.rand(10);
        o = gen.rand(2);        
        System.out.println("vertical sub x = " + x + "\n");
        System.out.println("vertical sub y = " + y + "\n");
        g.addSub(x,y, o);

        x = gen.rand(10);
        y = gen.rand(10);
        o = gen.rand(2);        
        System.out.println("vertical battle x = " + x + "\n");
        System.out.println("vertical battle y = " + y + "\n");
        g.addBattle(x,y, o);    

        x = gen.rand(10);
        y = gen.rand(10);
        o = gen.rand(2);                
        System.out.println("vertical air x = " + x + "\n");
        System.out.println("vertical air y = " + y + "\n");
        g.addAir(x,y, o);

        x = gen.rand(10);
        y = gen.rand(10);
        o = gen.rand(2);                
        System.out.println("vertical mine x = " + x + "\n");
        System.out.println("vertical mine y = " + y + "\n");
        g.addMine(x,y, o);

        x = gen.rand(10);
        y = gen.rand(10);
        o = gen.rand(2);
        System.out.println("horizontal dest x = " + x + "\n");
        System.out.println("horizontal dest y = " + y + "\n");
        g.addDest(x,y, o);

    }

    System.out.println("agent grid");
    System.out.println(g.toString());

    return g;
}

例如，

    x = gen.rand(10); 
    y = gen.rand(10);
    o = gen.rand(2);        
    System.out.println("vertical sub x = " + x + "\n");
    System.out.println("vertical sub y = " + y + "\n");
    g.addShip(x, y, o, "Submarine");
    /* x,y are the coordinates to define where to place the ship and o
    defines how to place the ship (horizontal or vertical) */

从String类型中你可以看到应该初始化哪种类型的船，这意味着你要调用addSubmarine方法

以下是原始代码https://github.com/michaelokarimia/battleships/tree/master/Battleships的链接。您可以在Agent类中找到此代码。任何帮助表示赞赏。

Answer 1

如果要在代码中使用Factory模式，则应执行以下操作：

从抽象类Ship扩展所有Ship类。
创建一个抽象类AbstractShipFactory，其中包含方法Ship createShip(int, int, int)。
创建具体的类，如BattleShipFactory，DestShipFactory等，这些类扩展AbstractShipFactory并覆盖createShip。

在代码中使用工厂：

while(!g.allShipsPlaced())
{
    NumberGenerator gen = new NumberGenerator();
    AbstractShipFactory battleFactory = new BattleShipFactory();
    ...
    g.addShip(battleFactory.createShip(gen.rand(), gen.rand(), gen.rand()));
    ...
}

它叫做工厂方法。请注意，您必须为每种新产品类型创建新工厂。

如何使用Factory模式重构我的Java代码？

1 个答案: