Java 转换语句&；用户输入

我正在写一个程序，从电影《幽灵之旅》中移走一张志广的照片。我现在需要做的就是把她左右上下移动。她有一个用户输入的初始位置。然后，我的程序要求用户输入移动她的u/d/l/r。如何提示用户输入以再次移动她？它总是移动她，然后退出循环

// Initial position
Scanner keyboard = new Scanner(System.in);
System.out.print("Starting row: ");
int currentRow = keyboard.nextInt();
System.out.print("Starting column: ");
int currentCol = keyboard.nextInt();

// Create maze
Maze maze = new Maze(numberRows, numberCols, currentRow, currentCol);

System.out.print("Move Chichiro (u/d/lr): ");

char move = keyboard.next().charAt(0);

switch (move){

    case 'u': maze.moveTo(--currentRow, currentCol); // move up 
        break;
    case 'd': maze.moveTo(++currentRow, currentCol); // move down 
        break;
    case 'l': maze.moveTo(currentRow, --currentCol); // move left 
        break;
    case 'r': maze.moveTo(currentRow, ++currentCol); // move right
        break;
    default: System.out.print("That is not a valid direction!");

}

---

将代码放在while循环中，并包括退出方法，如按

q

键：

 boolean quit=false;

 //keep asking for input until a 'q' is pressed
 while(! quit) {
   System.out.print("Move Chichiro (u/d/l/r/q): ");
   char move = keyboard.next().charAt(0);     

   switch (move){
     case 'u': maze.moveTo(--currentRow, currentCol); // move up
               break;
     case 'd': maze.moveTo(++currentRow, currentCol); // move down break;
     case 'l': maze.moveTo(currentRow, --currentCol); // move left 
               break;
     case 'r': maze.moveTo(currentRow, ++currentCol); // move right
               break;
     case 'q': quit=true; // quit playing
               break;
     default: System.out.print("That is not a valid direction!");}}
  }
}

---

使用以下代码，您可以随意移动，当您想退出程序时，只需键入“q”：

        // Create maze
    Maze maze = new Maze(numberRows, numberCols, currentRow, currentCol);
    char move;


    do{

            System.out.print("Move Chichiro (u/d/lr): ");

        move = keyboard.next().charAt(0);

        switch (move){

            case 'u': maze.moveTo(--currentRow, currentCol); // move up 
                break;
            case 'd': maze.moveTo(++currentRow, currentCol); // move down 
                break;
            case 'l': maze.moveTo(currentRow, --currentCol); // move left 
                break;
            case 'r': maze.moveTo(currentRow, ++currentCol); // move right
                break;
            default: System.out.print("That is not a valid direction!");

        }

    }while(move != 'q');

---

编辑：更正

您需要在开关盒周围设置一个

do-while

循环。