如何限制二維數組用戶輸入並輸出其餘值「。」？

Question

我想要做的是給用戶5個輸入（棋子），白嘴鴉，主教，國王，女王，騎士。並將它們輸出到一個網格中，我不知道如何將用戶輸入限制爲5次，並用「。」打印網格的其餘部分。

我的輸出結果現在在下面的網格中，但是我怎樣才能得到Qb2的用戶輸入（女王，在第2列，在第2行？）），並把它放在網格中？等等碎片 ？

Output of the result I get vs the output of the sample given

注意：列是從「A」到「H」和行從底部開始，所以從「第1行」至行「8」。

. . . . . . . . 
. . . . . . . . 
. . . . . . . . 
. . . . . . . . 
. . . . . . . . 
. . . . . . . . 
. . . . . . . . 
. . . . . . . . 

我的代碼：（？女王，第2欄第2行）

import java.util.Scanner; 
     class chessMoves 
     { 
      //MAIN CODE AT THE VERY BOTTOM OF THE CLASS 
      Scanner sc = new Scanner(System.in); 

      private String[][] grid = new String[8][8]; 
      //target is x, so if x is at location in the grid, your program should determine if 
      // any of the pieces can move to that position. 
      private String king,queen,rook,bishop,knight,target; 

      public void chessPieces(){ 

      //remember you're only using the peices in scanner for a string just for a test 
     //switch them to 2D Array so that i can as 
     System.out.println("Hello Guest00129, Welcome to Chess."); 
     System.out.println("In order to play this game, input pieces like below(cap;atilaized)"); 
     System.out.println("Rook at column c and at row 5 then: Rc5"); 

     System.out.println("Please enter a position for Rook"); 
     rook = sc.nextLine(); 
     System.out.println("Please enter a position for King"); 
     king = sc.nextLine(); 
     System.out.println("Please enter a position for Queen"); 
     queen = sc.nextLine(); 
     System.out.println("Please enter a position for Bishop"); 
     bishop = sc.nextLine(); 
     System.out.println("Please enter a position for Knight"); 
     knight = sc.nextLine(); 
     System.out.println("Please enter a position for Target(X) to move the peices to that position"); 
     target = sc.nextLine(); 
     } 
     public void printGrid(){  
      for(int row = 0; row <grid.length; row++){ 
      for (int column = 0;column <grid[row].length; column++){ 
      grid[row][column] = "."; 
      System.out.printf("%2s",grid[row][column] + " "); 
      } 
      System.out.println(); 
     } 
     } 
     //get the userinput working first then make a file that gets the information for that userinput and outputs here 
     public void readChessPositions(){ 
     } 
     //the file created from the method above read it print the grid here like printout here and show the possible 
     //positons that can attack 
     public void chessOutput(){ 
     } 
     //method that prints the grid with the positiosn showed in the outputfile of chess moves 
     //print all empty spaces with dot(.) and the postiions 
     public static void main (String[] args){ 
     chessMoves test1 = new chessMoves(); 
     test1.chessPieces(); 
     test1.printGrid(); 
     } 
    } 

Answer 1

「我的輸出結果，現在下面的網格，但我怎麼能得到QB2的userinput）和把它放在網格中，其餘的都是這樣的？「 用戶將始終輸入三個字符的字符串。 使用charAt（int index）。 編輯1 :(閱讀評論後） 這裏是代碼，運行它，並告訴我，如果這是你想要的程序。

import java.util.Scanner; 
    class chessMoves 
    { 
     //MAIN CODE AT THE VERY BOTTOM OF THE CLASS 
     Scanner sc = new Scanner(System.in); 

     private String[][] grid = new String[8][8]; 
     //target is x, so if x is at location in the grid, your program should determine if 
     // any of the pieces can move to that position. 
     private String king,queen,rook,bishop,knight,target; 

     public void chessPieces(){ 

     //remember you're only using the peices in scanner for a string just for a test 
    //switch them to 2D Array so that i can as 
    System.out.println("Hello Guest00129, Welcome to Chess."); 
    System.out.println("In order to play this game, input pieces like below(cap;atilaized)"); 
    System.out.println("Rook at column c and at row 5 then: Rc5"); 

    System.out.println("Please enter a position for Rook"); 
    rook = sc.nextLine(); 
    System.out.println("Please enter a position for King"); 
    king = sc.nextLine(); 
    System.out.println("Please enter a position for Queen"); 
    queen = sc.nextLine(); 
    System.out.println("Please enter a position for Bishop"); 
    bishop = sc.nextLine(); 
    System.out.println("Please enter a position for Knight"); 
    knight = sc.nextLine(); 
    System.out.println("Please enter a position for Target(X) to move the peices to that position"); 
    target = sc.nextLine(); 
    } 
    public void printGrid(){  
     for(int row = 0; row <grid.length; row++){ 
     for (int column = 0;column <grid[row].length; column++){ 
     grid[row][column] = "."; 
     } 
    }  
    grid[7-rook.charAt(2)+49][(int)rook.charAt(1)-97] = "r"; 
    grid[7-bishop.charAt(2)+49][(int)bishop.charAt(1)-97] = "b"; 
    grid[7-queen.charAt(2)+49][(int)queen.charAt(1)-97] = "q"; 
    grid[7-king.charAt(2)+49][(int)king.charAt(1)-97] = "k"; 
    grid[7-knight.charAt(2)+49][(int)knight.charAt(1)-97] = "i"; 
    grid[7-target.charAt(2)+49][(int)target.charAt(1)-97] = "x"; 


     for(int row = 0; row <grid.length; row++){ 
     for (int column = 0;column <grid[row].length; column++){ 
      System.out.printf("%2s",grid[row][column] + " "); 
     } 
     System.out.println(); 
    } 

    } 
    //get the userinput working first then make a file that gets the information for that userinput and outputs here 
    public void readChessPositions(){ 
    } 
    //the file created from the method above read it print the grid here like printout here and show the possible 
    //positons that can attack 
    public void chessOutput(){ 
    } 
    //method that prints the grid with the positiosn showed in the outputfile of chess moves 
    //print all empty spaces with dot(.) and the postiions 
    public static void main (String[] args){ 
    chessMoves test1 = new chessMoves(); 
    test1.chessPieces(); 
    test1.printGrid(); 
    } 
} 

爲了解釋我在做什麼，讓我解釋的charAt（）時類型強制轉換成整數會給值97,98,99返回character.Character A，B，C，d ...等等。同樣的字符1,2,3,4 ...會給47,48,49。 現在，當用戶輸入rc7（比如說）時，代碼將對c和7.c進行腐蝕的2d矩陣位置腐蝕到99，您需要將其設置爲2，以便減去97（您可以在代碼中看到）。類似地你可以看到7將變爲1. 如果你不明白，我建議閱讀關於ASCII和Unicode.basically ecah字符是分配一個數字代碼，就是這樣。 我把你的角色輸入，並將它們轉換成整數，把它們放在網格上。

現在，讓你的作品去了target.To這樣做定義的另一種方法 布爾inScope（INT [] []格，串片），定義在funtion二維數組（本地）讓它成爲8X8 並且讓它成爲int類型，並且將所有元素初始化爲零。製作可以通過一個片段到達的數組元素1.如果目標站在一個位置上，那麼您的片段可以到達那裏，返回true。