java - 大富翁游戏开发

Question

我好像有一个子任务有问题。它是丹麦语的，所以我放入了它的翻译版本:

• Create a class Field, that is representing the fields of a monopoly game. Initially, Field can contain these encapsulated variables:
  • String name - short name of the field
  • int number - a number in the range[1..40]

Both variables must be initialized in a constructor, and there must only be getters, as they never will be changed after creation. Moreover, there should be a method with the signature public String toString(), so it's easy to print what Field a player has landed on. At first it's allowed to just call the fields Field1, Field2...

我的 Field 类如下所示:

public class Field {

    String name;
    int number;

    public Field(String name, int number) {
        this.name = name;
        this.number = number;
    }

    public String getName() {
        return name;
    }

    public int getNumber() {
        return number;
    }
}

在我的 main 方法中，我想对此进行测试。所以我写了以下内容:

Field[] board = new Field[40]; // a board containing 40 fields

for (int i = 0; i < board.length; i++) {
    board[i] = new Field("Field" + (i + 1), i + 1);
}

System.out.println("Board: " + Arrays.toString(board));

在我的控制台中我得到了这个:

Board: [test.Field@2a139a55, test.Field@15db9742, test.Field@6d06d69c,......]

我想要这个:

Board: [Field1, Field2, Field3,......]

Answer 1

覆盖 Field 的 toString() 以返回名称，即

public String toString() {
  return name;
}

您得到的(例如 test.Field@2a139a55)是 toString() 的默认实现，可以在 Object 中找到:

public String toString() {
    return getClass().getName() + "@" + Integer.toHexString(hashCode());
}