0

我正在尝试做一些我以前从未做过的时髦的事情。

所以我想做的是:我通过执行以下操作创建一个对象

Player playerVar = new Player(1234);

然后 Players 构造函数将寻找一个 player called 1234,如果它存在,它将反序列化并将加载的对象存储在'playerVar, if not it'll just follow through and give a空白”播放器对象下。

我不确定是否有可能使当前对象成为同一对象的另一个实例,所以我在这里发布。

这基本上就是我想要做的。

this = deserielizedObject

我知道这可以通过加载对象,然后手动设置所有必要的变量来完成,但这并不理想。我如何从自身内部用另一个自身实例“替换”一个对象

这是我目前拥有的代码

播放器.java

    public class Player implements java.io.Serializable
    {
        Player(String GUID) // when loading a new player
        {
            Player player = loadPlayer(GUID);
            //i want to set this to player
            // something like     this = player     If you know what i mean....
        }
        Player()//when creating a new player
        {

        }

        private Player loadPlayer(String GUID)
        {
            File f = new File("data/players/"+GUID+".ser");
            if(!f.exists())
            {
                Player player = new Player();
                return player;
            }
                Player player = null;
            try
            {
                FileInputStream fileIn = new FileInputStream("data/players/"+GUID+".ser");
                ObjectInputStream in = new ObjectInputStream(fileIn);
                player = (Player) in.readObject();
                in.close();
                fileIn.close();
            }
            catch(IOException i)
            {
                i.printStackTrace();
                return null;
            }
            catch(ClassNotFoundException c)
            {
                System.out.println("Cant find Player Class!");
                c.printStackTrace();
                return null;
            }
            return player;
        }

        private int guid;
        private String name;
        private int bankMoney;
        .......
        ...
        .


    }
4

3 回答 3

2

您可以使用工厂类/方法。在您的情况下,最简单的方法可能是只loadPlayer使用公共静态方法。

    public static Player loadPlayer(String GUID)
    {
        ...
        return player;
    }

然后:

Player playerVar = Player.loadPlayer(1234);
于 2013-05-21T11:41:24.327 回答
0

你描述的不可能。但是您可以创建一个(静态)工厂方法而不是构造函数,它可以反序列化或创建一个新实例。

于 2013-05-21T11:41:38.460 回答
0

您不能为 赋值this,这是不可能的。为什么不直接调用loadPlayer方法:

Player player = Player.loadPlayer(GUID); //having loadPlayer as public static
于 2013-05-21T11:43:43.133 回答