如何修改方法与返回值，使得与调用时一致

Question

问题：选票系统方法中的 char 和 调用时String 矛盾，问一下怎么改。

首先是getSeat方法：

 public static char[][] getSeat () {
            Scanner sc1 = new Scanner(System.in);
            Scanner sc2 = new Scanner(System.in);

            char[][] A = {
                    {'A', 'B', 'C', 'D'},
                    {'A', 'B', 'C', 'D'},
                    {'A', 'B', 'C', 'D'},
                    {'A', 'B', 'C', 'D'},
                    {'A', 'B', 'C', 'D'},
                    {'A', 'B', 'C', 'D'},
                    {'A', 'B', 'C', 'D'},
            };

            int row = sc1.nextInt();
            char col = sc2.next().charAt(0);
            ;
            int column;
            column = (int) col - 97;

            if (row >= NUMROWS && column >= NUMSEATS) {
                System.out.println("Invalid seat, please re-enter");
            } else if (A[row][column] == 'X') {
                System.out.println("Sorry, " + row + col + " is already taken. ");

            } else {
                A[row][column] = 'X';
                System.out.println("OK, you've chosen " + row + col);
            }

           return A ;
        } 

然后是main方法里调用getSeat方法的部分

            do {
                // Show seat diagram
                printSeats(planeSeats);

                // Get seat choice
                
                String seatChoice = getSeat();          <-----------这是报错的那一行

                //parse the seatChoice string and book the seat
                seatsTaken = parseAndBook(seatChoice, planeSeats, seatsTaken);

                // If there are seats left, see if we should keep going
                System.out.println( "You have booked " + seatsTaken + " seats." );
                if (seatsTaken < totalSeats)
                {
                    System.out.println("Choose another seat? (y/n) ");
                    String yesNo = stdInput.next();
                    keepGoing = yesNo.charAt(0);
                }
                else
                {
                    System.out.println("Plane is now full!" );
                    break;    //break out of the loop if all seats have been taken
                }
            } while (keepGoing == 'y' || keepGoing == 'Y');

            //Show final seating chart
            System.out.println( "Final seating chart" );
            System.out.println();
            printSeats(planeSeats);

这是报错内容：

下面main里的代码是不能改的，那怎么改上面方法里的代码呢？
求解答，谢谢！

Answer 1

• 你可以看下这个问题的回答https://ask.csdn.net/questions/7568847