我有这个数组游戏场，它包含一些“ R”，“ O”，“ X”和一个“ +”。我必须将X移到+，当X处于“ +”时，游戏结束。我必须使用java.util.Scanner来做，但是我不知道怎么做。有人能帮我吗？
如您所见，我已经尝试过了，但是没有用。 <-//玩家移动后的一切
代码：
public class test {
public static void main(String[] args) {
String moveSelect;
boolean validInput = true;
int WIDTH = 18;
int HEIGHT = 11;
final int CHAR_COUNT = 15;
final char[] CHARS = {'R','O'};
Random random = new Random();
//field
char[][] field = new char[HEIGHT][WIDTH];
for (int i = 0; i < HEIGHT; i++) {
Arrays.fill(field[i], '.');
}
for (char ch: CHARS) {
for (int j = 0,x,y; j < CHAR_COUNT ; j++) {
do{
x = random.nextInt(WIDTH);
y = random.nextInt(HEIGHT);
} while (field[y][x] != '.');
field[5][0] = '+';
field[5][17] = 'X';
field[y][x] = ch;
}
}
//print field
for (char[]row : field) {
System.out.println(row);
}
// player movements
System.out.println("Enter a movement choice W A S or D");
do {
Scanner keyboard = new Scanner(System.in);
moveSelect = keyboard.nextLine();
if (moveSelect.equals("s")) {
WIDTH -= 1;
} else if (moveSelect.equals("d")) {
HEIGHT -= 1;
validInput = true;
} else if (moveSelect.equals("w")) {
WIDTH += 1;
validInput = true;
} else if (moveSelect.equals("a")) {
HEIGHT += 1;
validInput = true;
} else {
System.out.println("Invalid Entry. Try again.");
validInput = false;
}
} while (validInput == false);
//print field
for (char[]row : field) {
System.out.println(row);
}
}
}