Java 我正在尝试制作一个在命令行上玩的跳棋游戏，我可以'；I don’我不知道如何根据用户的输入移动工件

我的程序将打印出电路板，并要求用户输入，但输入不会改变电路板打印出的内容。我已经将userInput分配到了相应的位置，但似乎无法移动这些片段。我只是在学习如何使用不同的方法，我想这就是我大部分问题的来源。电路板打印是一种方法，目前移动是主要方法的一部分

import java.util.Scanner；
公共类跳棋{
公共静态空白打印板（）{
字符串[][]板=新字符串[9][9]；
对于（int i=0；i对于（int j=1；j变量
String[]board
在
printBoard
和
main
两种方法中似乎都是局部变量。一种方法不能影响其范围之外的局部变量。换句话说，即使变量在两种方法中的名称相同，但实际上它们是不同的变量。最简单的解决方案是使
String[]board
变量全局。
变量
字符串[][]board
在
printBoard
和
main
两种方法中似乎都是局部变量。一种方法不能影响其范围之外的局部变量。换句话说，即使变量在两种方法中的名称相同，但实际上它们是不同的变量。最简单的解决方案是使
String[]board
variable global.
如何将变量设置为全局？公共静态字符串[][]board；将board变量设置为全局后，它不再打印整个board，只打印第一行。如何将变量设置为全局？公共静态字符串[][]board；将board变量设置为全局后，它不再打印整个board，只打印第一行。
import java.util.Scanner;
public class Checkers {
public static void printBoard () {
    String[][] board = new String [9][9];
    for (int i=0; i < board.length; i++) {
        for (int j=0; j < board[i].length; j++) {
            board[i][j] = "";
        }
    } 
     // Numbers for rows.
    board[1][0] = "2";
    board[2][0] = "3";
    board[3][0] = "4";
    board[4][0] = "5";
    board[5][0] = "6";
    board[6][0] = "7";
    board[7][0] = "8"; 
    
    board[0][1] = "1";// Numbers for columns.
    board[0][2] = "2";
    board[0][3] = "3";
    board[0][4] = "4";
    board[0][5] = "5";
    board[0][6] = "6";
    board[0][7] = "7";
    board[0][8] = "8";
    
    board[8][1] = "WP";
    board[8][3] = "WP";
    board[8][5] = "WP";
    board[8][7] = "WP";
    board[7][2] = "WP";
    board[7][4] = "WP";
    board[7][6] = "WP";
    board[7][8] = "WP";
    board[6][1] = "WP";
    board[6][3] = "WP";
    board[6][5] = "WP";
    board[6][7] = "WP";
    
    board[1][2] = "BP";
    board[1][4] = "BP";
    board[1][6] = "BP";
    board[1][8] = "BP";
    board[2][1] = "BP";
    board[2][3] = "BP";
    board[2][5] = "BP";
    board[2][7] = "BP";
    board[3][2] = "BP";
    board[3][4] = "BP";
    board[3][6] = "BP";
    board[3][8] = "BP";
    
    for (int i=0; i < 1; i++) {
        for (int j=0; j < 9; j++) {
            System.out.print(board[i][j] + "     " );
        }
    }   
    System.out.println();
    
    boolean iswhite = true;
    String emptyBlack = "      ";
    String emptyWhite = "******";
    
    
    for (int i= 1; i< board.length; i++) {
        for (int j= 1; j< board[i].length; j++) {
            if (iswhite) {
                System.out.print(emptyWhite);
            } else {
                System.out.print(emptyBlack);
            }
            iswhite = !iswhite;
        }   
        System.out.println();
        
        for (int j=1; j< board[i].length; j++) {
            if (iswhite) {
                if (board[i][j].equals("")) {
                    System.out.print(emptyWhite);
                }   else {  
                System.out.print("**" + board[i][j] + "**");
                }
            }   else {
                    if (board[i][j].equals("")) {
                        System.out.print(emptyBlack);
                    } else {    
                    System.out.print("  " + board[i][j] + "  ");
                    }
                }   
                iswhite = !iswhite;
        }
        
        System.out.println();
        
        for (int j=1; j< board[i].length; j++) {
            if (iswhite) {
                System.out.print(emptyWhite);
            } else {
                System.out.print(emptyBlack);
            }
            iswhite = !iswhite;
        }   
        System.out.println();
        
        iswhite=!iswhite;
    }
  }

public static void main (String [] args) {
    Scanner scnr = new Scanner(System.in);
    
    System.out.println("Please select a piece to move by entering it's location.");
    
    int playerHz = scnr.nextInt();
    int playerVt = scnr.nextInt();
    System.out.println("Enter a new location.");
    
    int newHz = scnr.nextInt();
    int newVt = scnr.nextInt();
    String[][] board = new String [9][9];
    
    for (int i = 1; i < board.length; i++) {
        for (int j = 1; j <board[i].length; j++) {
            if (board[i][j] == (board[playerHz][playerVt]) ) {
             board[i][j] = "";
            }
            board[newHz][newVt] = "WP";
        }
    }
    printBoard();

 }
    
...
    
    
    
    

}