Question

我试图找到一种方法来添加更多已经填充的数组，程序的用户必须选择一个数组，例如seat [0] [1]，然后添加他们的名字应该添加在他们选择的座位旁边。有没有办法做到这一点，或者有没有办法改变他们选择的部分内容到他们的名字？我使用的是2D字符串数组。如果您能提供任何建议，我已经写过的代码，我将非常感谢。

{String [][] seat = new String[2][6];

seat[0][0] = "A.1"; 
seat[0][1] = "B.1";
seat[0][2] = "C.1";
seat[0][3] = "D.1";
seat[0][4] = "E.1";
seat[0][5] = "F.1";
seat[1][0] = "A.2";
seat[1][1] = "B.2";
seat[1][2] = "C.2";
seat[1][3] = "D.2";
seat[1][4] = "E.2";
seat[1][5] = "F.2";

//Print out array here using for-loops

System.out.println("Please choose your seat: ");
chosenseat=Keyboard.readString();

System.out.println("Please enter the name for the booking: ");
name=Keyboard.readString();}

Answer 1

数组是固定大小的，所以你应该使用像Collection这样的ArrayList：

List<List<String>> arr = new ArrayList<>();

添加“行”：

arr.add(new ArrayList<>());

将一个元素添加到一行：

arr.get(0).add("..."); // add an element to the first row
arr.add(new ArrayList<>()); // add another row
arr.get(1).add("..."); // add an element to the second row

并获得一个元素：

// ...
arr.get(1).get(0); // get first element of the second row

注意：

请记住，大多数编程语言中的索引都以0开头。因此，要访问第一个元素，您必须使用索引0。

Answer 2

程序的用户必须选择其中一个数组座位[0] [1]然后添加他们的名字应该添加到座位旁边他们选择了

我会创建一个类来处理：

class Seat {
    private String name;
    private String bookingName;

    public Seat(String name, String bookingName){
        this.name = name;
        this.bookingName = bookingName;
    }

    public Seat(String name){
        this(name, "unknown");
    }

    /*other stuff (getters, setters, ...)*/
}

然后将您的2D数组字符串更改为Seats的2D数组

Seat [][] seats = new Seat[2][6];

seats[0][0] = new Seat("A.1"); 
seats[0][1] = new Seat("B.1");
seats[0][2] = new Seat("C.1");
.....

最后，您需要循环遍历数组的元素。然后，对于每个座位，检查它的名称是否存在以及bookingName不是“未知”。然后设置此座位的预订名称。

Answer 3

这是我最终使用的答案，作业说“飞机将有30行和6列座位。行数用1-30索引，列用字母AF编制索引。内部你的程序应该将座位表示为2D阵列。当预订座位时，您的程序应该存储与该座位相关联的名称。您可以将其实现为具有单个2D阵列的字符串，用于座位占用和名称。这个答案用例如A.1替换A.1。

String chosenseat, name;


System.out.println("The seat map: ");
        String [][] seat = new String[2][3];

        seat[0][0] = "A.1";         
        seat[0][1] = "B.1";
        seat[0][2] = "C.1";

        seat[1][0] = "A.2";
        seat[1][1] = "B.2";
        seat[1][2] = "C.2";

        for(int i=0;i<seat.length;i++)//loop through the rows
            {
                for(int j=0;j<seat[0].length;j++)//loop through the columns
                {
                    System.out.print(seat[i][j]+" ");
                }
                System.out.println();
            }
        String stringToSearch;

        System.out.println("What seat would you like:");
        stringToSearch=Keyboard.readString();

        System.out.println("Please enter your name: ");
        name=Keyboard.readString();

        for (int i = 0; i <seat.length; i++)
        {
            for (int j = 0; j < seat[0].length; j++)
            {
                if (seat[i][j].equals(stringToSearch))
                System.out.print(i);

            }
        }
        for (int i = 0; i <seat.length; i++)
        {
            for (int j = 0; j < seat[0].length; j++)
            {
               if (seat[i][j].equals(stringToSearch))
                    System.out.println("."+j);
            }
        }
        for(int i=0;i<seat.length;i++)//loop through the rows
        {
            for(int j=0;j<seat[0].length;j++)//loop through the columns
            {
                if (seat[i][j].equals(stringToSearch))
                seat[i][j]=name;
            }
        }

        for(int i=0;i<seat.length;i++)//loop through the rows
            {
                for(int j=0;j<seat[0].length;j++)//loop through the columns
                {
                    System.out.print(seat[i][j]+" ");
                }
                System.out.println();
            }
        }
    }

如何在java中添加更多字符串数组的内容

3 个答案: