打印10 x 10坐标网格

Question

我正在打印一个网格，从0- 9显示为列，0-9显示为行。

我想把它显示为列的0-9和行的A-J，但不知道如何在循环中使用字符而不是整数？

public class BattleshipGame {

private char[][] playerBoard;   
private char[][] compBoard;     
private final static int boardSize = 10;
private String input, shipType, shipDirection = ""; 
public static String name;      
private int shipRowLoc, shipColLoc; 
private boolean allowed, random = false, showShips = false;
private MoveType moveType;
private ArrayList<Battleships> enemyShips = new ArrayList<Battleships>();

Scanner userinput = new Scanner(System.in);

public BattleshipGame() {
    playerBoard = new char[boardSize][boardSize];
    compBoard = new char[boardSize][boardSize];
    initializeBoard();  
    placeShip();    
}

public void initializeBoard() {
    for (int i = 0; i < boardSize; i++)
        for (int j = 0; j < boardSize; j++){
            playerBoard[i][j] = '~';
            compBoard[i][j] = '~';
    }
}

Answer 1

你有几个选择，你可以用

for (char ch = 'A'; ch <= 'J'; ch++)

或者类似的东西

for (int j = 0; j < 10; j++) {
  char ch = (char) ('A' + j);

Answer 2

要从A-J映射字符，您可能只需在它们的代码点对它们进行索引。

例如，A是65。

所以System.out.println((char)65)会打印A。

通过索引将其从0增加到9，然后将字符从A增加到J。