Question

我是Java新手，也是创建战舰游戏的练习。显然，有两个游戏板（每个游戏一个），每个游戏板将分配三个游轮。那么，我的想法是制作一个“GameBoard”类，其中包含一个“船”类，所以我可以创建新的船只，这些船只将被放置在它们的板上。这是我到目前为止所做的：

public class GameBoard {
    int columnCount = 7;
    int rowCount = 7;
    int spaceCount = rowCount*columnCount;

    private class ship {
        private String name;
        private void setName(String newName) {
            name = newName;
        }
    }
}

现在我的问题是如何在游戏板中调用新船。要创建一个新的董事会，我会这样做：

GameBoard player1 = new Gameboard();

但是我从哪里去？它会是这样的吗？

player1.ship ship1 = new player1.ship();

我的直觉告诉我这是非常错误的，我只是不确定该怎么做。谢谢你的帮助！

Answer 1

你可以这样做。

public class GameBoard {
int columnCount = 7;
int rowCount = 7;
int spaceCount = rowCount*columnCount;
ship s;

}


public class ship {
    private String name;
    private void setName(String newName) {
        name = newName;
    }
}

然后

GameBoard gb = new GameBoard();
gb.s = new ship();

Answer 2

您的意思是如何从外部类中实例化新船？在这种情况下，您可以简单地写

ship t = new ship();

Answer 3

如果您想从外层实例发货，您应该：

使船舶类静止。
将船类公开。

如下：

public class GameBoard {
    int columnCount = 7;
    int rowCount = 7;
    int spaceCount = rowCount*columnCount;

    public static class ship {
        private String name;
        private void setName(String newName) {
            name = newName;
        }
    }
}

然后你可以这样做：

 ship1 = new GameBoard.ship();

Answer 4

Ship是一个私有类，所以它只能由GameBoard修改。您可以通过以下方式创建船舶：

public class GameBoard {
int columnCount = 7;
int rowCount = 7;
int spaceCount = rowCount*columnCount;
ship _ship = new ship();

private class ship {
    private String name;
    private void setName(String newName) {
        name = newName;
    }
}
public ship getShip(){return _ship);

您必须通过player.getShip().setName("USS SOMETHING")

设置名称

或者更好

public class GameBoard {
    int columnCount = 7;
    int rowCount = 7;
    int spaceCount = rowCount*columnCount;
    ship _ship;

    public GameBoard(String shipName){
       _ship = new ship();
       _ship.setName(shipName);
    }

    private class ship {
        private String name;
        private void setName(String newName) {
            name = newName;
        }
    }

在创建GameBoard时，您可以在其中设置船名。 GameBoard player1 = new GameBoard("USS SOMETHING")

创建新的子类实例

4 个答案: