字符串数组中的随机位置?JAVA

字符串数组中的随机位置?JAVA,java,arrays,2d,Java,Arrays,2d,正在制作一个tic-tac-toe游戏。我正在尝试使用尽可能简单的方法。我目前正在努力让cpu在阵列中随机选择一个点来放置“O”。我该怎么做呢?这就是我目前所拥有的 import java.util.Scanner; import java.util.Random; public class Player { String player = "X"; String cpu = "O"; //private int[][] theBoard= new int [3][3]

正在制作一个tic-tac-toe游戏。我正在尝试使用尽可能简单的方法。我目前正在努力让cpu在阵列中随机选择一个点来放置“O”。我该怎么做呢?这就是我目前所拥有的

import java.util.Scanner;
import java.util.Random;
public class Player

{
    String player = "X";
    String cpu = "O";
    //private int[][] theBoard= new int [3][3] ;

    private String[][] theBoard=  {{" "," "," "}, {" "," "," "}, {" ", " "," "}};;
    Random cpuInput = new Random(); 

    private Board board1;
    public static Scanner scan = new Scanner(System.in);

public Player(Board board, String inBoard )
    {
        theBoard = theBoard;

    }

    public void computerMove()
    {
        String spacing = " ";
        for (int i = 0; i < theBoard.length; i++)
        {
            for (int j = 0; j < theBoard[i].length; j++)
            {

                //int random = cpuInput.nextInt(theBoard[i][j]);
                theBoard[2][2] = (cpu); //STUCK HERE!                
            }
        }
}
import java.util.Scanner;
导入java.util.Random;
公开课选手
{
字符串播放器=“X”;
字符串cpu=“O”;
//私有int[][]董事会=新int[3][3];
私有字符串[][]电路板={{,'','},{,'','},{,'','},{,'','};;
Random cpuInput=新随机();
私人董事会1;
公共静态扫描仪扫描=新扫描仪(System.in);
公共播放器(棋盘、内弦)
{
theBoard=theBoard;
}
公共空间移动()
{
字符串间距=”;
for(int i=0;i
您可以这样做,在0-2之间生成两个数字,如果未进行替换,则将其放置在索引[x][y]处

Random generator = new Random(); 
import java.util.*;
int x = generator.nextInt(3);
int y = generator.nextInt(3);
if place is not taken:
theBoard[x][y];
if place is taken generate again:
int x = generator.nextInt(3);
int y = generator.nextInt(3);

您可以这样做,在0-2之间生成两个数字,如果未进行替换,则将其放置在索引[x][y]处

Random generator = new Random(); 
import java.util.*;
int x = generator.nextInt(3);
int y = generator.nextInt(3);
if place is not taken:
theBoard[x][y];
if place is taken generate again:
int x = generator.nextInt(3);
int y = generator.nextInt(3);

你需要找出棋盘上的可用点,以便计算机进行移动。然后在可用点中,你可以随机选择一个进行移动

在下面的示例中,我使用一个列表来存储棋盘上的可用点,并使用Collections.shuffle()来随机化列表,以实现随机移动的目的

class Spot {
    int row;
    int col;

    public Spot(int row, int col) {
        this.row = row;
        this.col = col;
    }
}

public void computerMove() {
    String spacing = " ";

    // firstly finding out the available moves for the computer
    List<Spot> availableSpots = new ArrayList<>();
    for (int i = 0; i < theBoard.length; ++i) {
        for (int j = 0; j < theBoard[i].length; ++j) {
            if (theBoard[i][j].equals(spacing)) {
                availableSpots.add(new Spot(i, j));
            }
        }
    }

    // if no available moves, do nothing, game has ended
    if (availableSpots.isEmpty()) {
        System.out.println("No more spots available on the board.");
        return;
    } else {
        // shuffle the list so that it becomes randomly orderedd
        Collections.shuffle(availableSpots);

        // get the first one of the random list
        Spot spot = availableSpots.get(0);
        theBoard[spot.row][spot.col] = (cpu);
    }
}
课堂现场{
int行;
int col;
公共点(国际行、国际列){
this.row=行;
this.col=col;
}
}
公共空间移动(){
字符串间距=”;
//首先找出计算机可用的移动方式
List availableSpots=new ArrayList();
对于(int i=0;i
您需要找出板上的可用点,以便计算机移动。然后在可用点中,您可以随机选择一个进行移动

在下面的示例中,我使用一个列表来存储棋盘上的可用点,并使用Collections.shuffle()来随机化列表,以实现随机移动的目的

class Spot {
    int row;
    int col;

    public Spot(int row, int col) {
        this.row = row;
        this.col = col;
    }
}

public void computerMove() {
    String spacing = " ";

    // firstly finding out the available moves for the computer
    List<Spot> availableSpots = new ArrayList<>();
    for (int i = 0; i < theBoard.length; ++i) {
        for (int j = 0; j < theBoard[i].length; ++j) {
            if (theBoard[i][j].equals(spacing)) {
                availableSpots.add(new Spot(i, j));
            }
        }
    }

    // if no available moves, do nothing, game has ended
    if (availableSpots.isEmpty()) {
        System.out.println("No more spots available on the board.");
        return;
    } else {
        // shuffle the list so that it becomes randomly orderedd
        Collections.shuffle(availableSpots);

        // get the first one of the random list
        Spot spot = availableSpots.get(0);
        theBoard[spot.row][spot.col] = (cpu);
    }
}
课堂现场{
int行;
int col;
公共点(国际行、国际列){
this.row=行;
this.col=col;
}
}
公共空间移动(){
字符串间距=”;
//首先找出计算机可用的移动方式
List availableSpots=new ArrayList();
对于(int i=0;i
这是说缺少了一个“符号”。我该如何填写它?谢谢。我从来没有用过这些before@pewpew是java泛型,请查看这篇文章,了解有关泛型的更多信息;Spot是我创建的一个简单类,用于包装行和列。我更新了代码,所以它说缺少一个“符号”。我该如何填写它?谢谢。我有e从未使用过这些before@pewpew是java泛型,请查看本文以了解有关泛型的更多信息;Spot是我创建的一个简单类,用于包装行和列。更新了我的代码谢谢您的输入谢谢您的输入