如何解决初学者：如何检查4个标记在行，列和/或对角线中是否在Connect 4游戏中宣布获胜者
我想知道如何检查Connect，R，Y分别在行，列和对角线中是否有4个Rs或Ys（使用代码中显示的以下字符串）来声明我的Connect 4游戏的获胜者，我花了5个小时来计算它但我对编码还是太陌生，无法理解该怎么做。请保留下面所有的代码（请不要使用私有类，或初学者自从交给我的老师以来不知道的任何东西）。 感谢所有发表评论并给予我答复的人。
package finalproject;
import java.util.*;
import java.util.Arrays;
public class ConnectFour
{
public static void main(String[] args)
{
System.out.println("Welcome to Connect 4,\n\nObjective:\nBe the first player to get four of your colored checkers in a row- in any direction.\nRemember,you have to drop your circle to the very bottom row,you can't leave circles floating in random areas.");
String [] tokenColor = {"R","Y"};
//methods arrays
int playerselect = menu();
System.out.println("Im in main");
int currentPlayer = players(1);
//arrays for each column of the board
String [] column1 = {"O","O","O"};
String [] column2 = {"O","O"};
String [] column3 = {"O","O"};
String [] column4 = {"O","O"};
String [] column5 = {"O","O"};
String [] column6 = {"O","O"};
String [] column7 = {"O","O"};
for (int i = 1; i<=42; i++)
{
//using a for loop to to change the board after every player move
printboard(column1,column2,column3,column4,column5,column6,column7);
System.out.println("before placement");
tokenPlacement(tokenColor[currentPlayer],column1,column7);
System.out.println("after placement");
printboard(column1,column7);
currentPlayer = players(currentPlayer);
}
}
public static void printboard(String[] column1,String[] column2,String[] column3,String[] column4,String[] column5,String[] column6,String[] column7)
{
System.out.println(1234567);
//prints out board using loop
for (int i = 5; i>=0; i--)
{
System.out.print(column1[i]);
System.out.print(column2[i]);
System.out.print(column3[i]);
System.out.print(column4[i]);
System.out.print(column5[i]);
System.out.print(column6[i]);
System.out.print(column7[i]);
System.out.println();
}
}
public static int menu()
{
//enters menu method
//scanner looks for next input from user
Scanner myInput = new Scanner (system.in);
int playerX;
//prints out menu,this menu give the user the option to pick either P1,P2 or to exit the game
System.out.println("\nUse the corresponding numbers below to choose a eaither a player,or to exit the program.\n (Note that when you choose player 1 you will always go first)");
System.out.println("\n 1. Choose player 1 (R)" );
System.out.println(" 2. Choose player 2 (Y)");
System.out.println(" 3. Exit");
System.out.println("\n Select an option");
playerX = myInput.nextInt();
//if statements for player selection
if (playerX == 1)
{
System.out.println("You are Red");
System.out.println("\nPlayer 2 is Yellow");
}
else if (playerX == 2)
{
System.out.println("You are Yellow");
System.out.println("\nPlayer 2 is Red");
}
//exits program
else if (playerX == 3)
{
System.out.println("You didn't choose a player! Shutting Down connect_four.exe");
System.exit(0);
}
//exits program
else
{
System.out.println("Sorry,I dont't understand? Please re-run the program and choose again.");
System.exit(0);
}
return playerX;
}//end menu
public static int players(int currentPlayer) {
System.out.println("Im in the players method");
//displays and decides who's turn it is
if (currentPlayer == 0)
{
currentPlayer = (1);
System.out.println("\nIt's Yellow's Turn");
}
else if (currentPlayer == 1)
{
currentPlayer = (0);
System.out.println("\nIt's Red's Turn");
}
System.out.println(currentPlayer);
//loops on who goes
return currentPlayer;
}//end players
public static void tokenPlacement(String tokenColor,String [] column1,String [] column2,String [] column3,String [] column4,String [] column5,String [] column6,String [] column7)
{
//scans for user's next input
Scanner myInput = new Scanner (system.in);
System.out.println("\nOut of the 7 columns above,choose a number between 1-7 to signify which column you choose");
int columnChoice = myInput.nextInt();
boolean placed = false;
//if statement that runs a for loop if columnChoice/users's input == 1
if (columnChoice == 1)
{
for (int i=0; i<=5; i++)
{
//looks to see if the selected slot has a "O" and if so prints out either a "R" or a "Y" dependent of what player you are
if (column1[i].equals("O"))
{
column1[i] = tokenColor;
placed = true;
break;
}
}
//if a whole column if filled with "R"s or "Y"s tell the user to choose a different column
if (!placed)
{
System.out.println("Sorry that column is full. Choose another column");
tokenPlacement(tokenColor,column7);
}
}
else if (columnChoice == 2)
{
for (int i=0; i<=5; i++)
{
//looks to see if the selected slot has a "O" and if so prints out either a "R" or a "Y" dependent of what player you are
if (column2[i].equals("O"))
{
column2[i] = tokenColor;
placed = true;
break;
}
}
//if a whole column if filled with "R"s or "Y"s tell the user to choose a different column
if (!placed)
{
System.out.println("Sorry that column is full. Choose another column");
tokenPlacement(tokenColor,column7);
}
}
else if (columnChoice == 3)
{
for (int i=0; i<=5; i++)
{
//looks to see if the selected slot has a "O" and if so prints out either a "R" or a "Y" dependent of what player you are
if (column3[i].equals("O"))
{
column3[i] = tokenColor;
placed = true;
break;
}
}
//if a whole column if filled with "R"s or "Y"s tell the user to choose a different column
if (!placed)
{
System.out.println("Sorry that column is full. Choose another column");
tokenPlacement(tokenColor,column7);
}
}
else if (columnChoice == 4)
{
for (int i=0; i<=5; i++)
{
//looks to see if the selected slot has a "O" and if so prints out either a "R" or a "Y" dependent of what player you are
if (column4[i].equals("O"))
{
column4[i] = tokenColor;
placed = true;
break;
}
}
//if a whole column if filled with "R"s or "Y"s tell the user to choose a different column
if (!placed)
{
System.out.println("Sorry that column is full. Choose another column");
tokenPlacement(tokenColor,column7);
}
}
else if (columnChoice == 5)
{
for (int i=0; i<=5; i++)
{
if (column5[i].equals("O"))
{
column5[i] = tokenColor;
placed = true;
break;
}
}
//if a whole column if filled with "R"s or "Y"s tell the user to choose a different column
if (!placed)
{
System.out.println("Sorry that column is full. Choose another column");
tokenPlacement(tokenColor,column7);
}
}
else if (columnChoice == 6)
{
for (int i=0; i<=5; i++)
{
//looks to see if the selected slot has a "O" and if so prints out either a "R" or a "Y" dependent of what player you are
if (column6[i].equals("O"))
{
column6[i] = tokenColor;
placed = true;
break;
}
}
//if a whole column if filled with "R"s or "Y"s tell the user to choose a different column
if (!placed)
{
System.out.println("Sorry that column is full. Choose another column");
tokenPlacement(tokenColor,column7);
}
}
else if (columnChoice == 7)
{
for (int i=0; i<=5; i++)
{
//looks to see if the selected slot has a "O" and if so prints out either a "R" or a "Y" dependent of what player you are
if (column7[i].equals("O"))
{
column7[i] = tokenColor;
placed = true;
break;
}
}
//if a whole column if filled with "R"s or "Y"s tell the user to choose a different column
if (!placed)
{
System.out.println("Sorry that column is full. Choose another column");
tokenPlacement(tokenColor,column7);
}
}
}//end tokenPlacement
}//end main
解决方法
为水平检查，垂直检查，向上对角线检查和向下对角线检查编写单独的方法。为每个板位调用4种方法。 – Gilbert Le Blanc 10小时前
public static void main(String[] args) {
String [] [] board = new String[6][7];
//set everything on the board to zero
for (int i =0; i< board.length; i++) {
for (int j = 0; j < board[i].length; j++) {
board[i][j] = "0";
}
System.out.println();
}
//assign a random winning situation
board[3][2] = "Y";
board[3][3] = "Y";
board[3][4] = "Y";
board[3][5] = "Y";
board[3][1] = "R";
board[2][2] = "R";
board[1][3] = "R";
board[0][4] = "R";
board[4][5] = "Y";
board[3][4] = "Y";
board[2][3] = "Y";
board[1][2] = "Y";
board[3][1] = "R";
board[2][1] = "R";
board[1][1] = "R";
board[0][1] = "R";
board[2][5] = "Y";
board[1][5] = "Y";
board[4][3] = "Y";
board[5][2] = "Y";
//print board
printBoard(board);
//check for right row
System.out.println(isRightRowContain4(board,3,2));
//check for up-right-diagonal
System.out.println(isUpRightDiagonalContain4(board,1));
//check for up-left-diagonal
System.out.println(isUpLeftDiagonalContain4(board,4,5));
//check for up-column
System.out.println(isUpColumnContain4(board,1));
//check for down-column
System.out.println(isDownColumnContain4(board,1,5));
//check for left row
System.out.println(isLeftRowContain4(board,5));
//down-left-diagonal
System.out.println(isDownLeftDiagonalContain4(board,2,5));
//down-right-diagonal
System.out.println(isDownRightDiagonalContain4(board,2));
}
public static void printBoard(String [][] board){
for (int i =0; i< board.length; i++){
for(int j=0; j<board[i].length; j++){
System.out.print(board[i][j]+" ");
}
System.out.println();
}
}
public static boolean isRightRowContain4(String [] [] board,int row,int col){
boolean result = false;
int count =0;
String tokenValue = board[row][col];
for(int k=0; k<4; k++) {
if (tokenValue.equalsIgnoreCase(board[row][col + k])) {
count++;
}
}
if (count == 4)
result = true;
return result;
}
public static boolean isLeftRowContain4(String [] [] board,int col){
boolean result = false;
int count =0;
String tokenValue = board[row][col];
for(int k=0; k<4; k++) {
if (tokenValue.equalsIgnoreCase(board[row][col - k])) {
count++;
}
}
if (count == 4)
result = true;
return result;
}
public static boolean isUpRightDiagonalContain4(String [] [] board,int col){
boolean result = false;
int count =0;
String tokenValue = board[row][col];
for(int k=0; k<4; k++) {
if (tokenValue.equalsIgnoreCase(board[row-k][(col+k)])) {
count++;
}
}
if (count == 4)
result = true;
return result;
}
public static boolean isUpLeftDiagonalContain4(String [] [] board,int col){
boolean result = false;
int count =0;
String tokenValue = board[row][col];
for(int k=0; k<4; k++) {
if (tokenValue.equalsIgnoreCase(board[row-k][(col-k)])) {
count++;
}
}
if (count == 4)
result = true;
return result;
}
public static boolean isUpColumnContain4(String [] [] board,int col) {
boolean result = false;
int count = 0;
String tokenValue = board[row][col];
for (int k = 0; k < 4; k++) {
if (tokenValue.equalsIgnoreCase(board[row - k][col])) {
count++;
}
}
if (count == 4)
result = true;
return result;
}
public static boolean isDownColumnContain4(String [] [] board,int col) {
boolean result = false;
int count = 0;
String tokenValue = board[row][col];
for (int k = 0; k < 4; k++) {
if (tokenValue.equalsIgnoreCase(board[row + k][col])) {
count++;
}
}
if (count == 4)
result = true;
return result;
}
public static boolean isDownRightDiagonalContain4(String [] [] board,int col){
boolean result = false;
int count =0;
String tokenValue = board[row][col];
for(int k=0; k<4; k++) {
if (tokenValue.equalsIgnoreCase(board[row+k][(col+k)])) {
count++;
}
}
if (count == 4)
result = true;
return result;
}
public static boolean isDownLeftDiagonalContain4(String [] [] board,int col){
boolean result = false;
int count =0;
String tokenValue = board[row][col];
for(int k=0; k<4; k++) {
if (tokenValue.equalsIgnoreCase(board[row+k][(col-k)])) {
count++;
}
}
if (count == 4)
result = true;
return result;
}
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