简易公交车预订座位

Question

交给我的任务是确定用户的输入，每当用户输入预订座位的输入时，来自用户的特定输入存储的字符串将被替换为"X“，即"X”，表示座位已预订。我应该使用二维数组。

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我不知道如何根据用户输入将存储的字符串"*“替换为"X”。

到目前为止，这是我的代码。

import java.util.Scanner;

public class ReservationSeat {
    
    public static void main(String []args){
        Scanner reader = new Scanner(System.in);
        
        String[] columns = { "Col 1",  "Col 2",  "Col 3",  "Col 4" };
        for(int i = 0; i < columns.length; i++){
            System.out.print("\t" + columns[i]);

        }
        String[] Rows = { "Row 1 ", "Row 2 ", "Row 3 ", "Row 4 ", "Row 5 ", "Row 6 ", "Row 7 ", "Row 8 ", "Row 9 ", "Row 10 "};
        String [][] table = {
                {"|*", "*","*", "*"},
                {"|*", "*","*", "*"},
                {"|*", "*","*", "*"},   
                {"|*", "*","*", "*"},
                {"|*", "*","*", "*"},
                {"|*", "*","*", "*"},
                {"|*", "*","*", "*"},
                {"|*", "*","*", "*"},
                {"|*", "*","*", "*"},
                {"|*", "*","*", "*"}

        };
        System.out.println();   
        
        for(int row = 0; row < table.length; row++){
            System.out.print(Rows[row]);
            for(int col = 0; col < table[row].length; col++){
                
                System.out.print("\t" + table[row][col]);

            }

            System.out.println();
        }
        
        System.out.print("Enter row and column number to reserve separated by space (Enter a negative number to exit): ");
        int row1 = reader.nextInt();
        int col1 = reader.nextInt();
        table[row1][col1] = reader.next();
        int[][] test1 = new int[row1][col1];
        
        for (int row = 0; row < table.length; row++) {
            System.out.print(Rows[row]);
            
            for(int col = 1; col < test1[row].length; col++) {
                System.out.print("\t" + test1[row1][col1]);
            }
        }
    }
}

Answer 1

以便根据用户输入将存储的字符串"*“替换为"X”。您不需要初始化第二个二维数组(test1)。当您在变量row1和col1中获得来自用户的输入时，您可以做的是。只需使用它们将*替换为同一数组中的X(在本例中为"table“)。

 int row1 = reader.nextInt();
 int col1 = reader.nextInt();

之后，您需要更新名为table的2D数组：

 table[row1][col1] = "X";

然后，您可以调用print函数来打印更新后的数组。这样，您将只有一个二维数组，并且将根据给定的用户输入进行更新。

Answer 2

这是我的完整答案，因为我们回答的是相同的问题。

public class BusReservation {
     public static void main(String[] args) {
         Scanner sc = new Scanner(System.in);
         boolean response = true;
         String[] user_respo;
        String[] Rows = { "Row 1 ", "Row 2 ", "Row 3 ", "Row 4 ", "Row 5 ", "Row 6 ", "Row 7 ", "Row 8 ", "Row 9 ", "Row 10 "};
        String [][] table = {
                {"|*", "*","*", "*"},
                {"|*", "*","*", "*"},
                {"|*", "*","*", "*"},   
                {"|*", "*","*", "*"},
                {"|*", "*","*", "*"},
                {"|*", "*","*", "*"},
                {"|*", "*","*", "*"},
                {"|*", "*","*", "*"},
                {"|*", "*","*", "*"},
                {"|*", "*","*", "*"}

        };
         

         
        do{ 
           System.out.println("Bus Reservation");
          String[] columns = { "Col 1",  "Col 2",  "Col 3",  "Col 4" };
        for(int i = 0; i < columns.length; i++){
            System.out.print("\t" + columns[i]);

        }

       
        System.out.println();   
        
        for(int row = 0; row < table.length; row++){
            System.out.print(Rows[row]);
            for(int col = 0; col < table[row].length; col++){
                
                System.out.print("\t" + table[row][col]);

            }

            System.out.println();
        }
        //TABLE REPEAT

        System.out.print("Enter row and column number to reserve separated by space (Enter a negative number to exit): ");
        //GET THE USER INPUT SEPARTING THE INTEGER WITH WHITE SPACE
        user_respo = sc.nextLine().split(" ");
        
        int row1 = Integer.parseInt(user_respo[0]);
        int col2 = Integer.parseInt(user_respo[1]);
        //CHECK IF IT IS A NEGATIVE NUMBER OR NOT
        if(Integer.parseInt(user_respo[0]) > 0 && Integer.parseInt(user_respo[1]) > 0){
             //MINUS 1 SINCE INDEX STARTS WITH 0
             table[row1-1][col2-1] = "X";
        }
        else{
        response = false;

        }
        
        }// END OF DO WHILE
        while(response == true);
        
        }// END MAIN
}