Connect4

import java.util.Scanner;

public class ct4 {

static char[][]board = new char [6][7];
static Scanner kb = new Scanner(System.in);
static int player = 0;
static int redWins =0, yellowWins=0;
static int r = 0,c = 0;
static char color;
    static int totalMoves = 42;
static boolean result1, result2;

public static void  initboard(char[][] b){
for (int r=0; r<b.length; r++) {
for (int c=0; c<b[0].length; c++) {
b[r][c]= ' ';
}
}
}

public static  char[][] displayBoard(char[][] b){
System.out.println();
for (int r = 0; r< b.length; r++){
System.out.print(" |");
for (int c = 0; c< b[0].length; c++){
System.out.print(" " + b[r][c] + " |");
}
System.out.println();

}
System.out.println(" -----------------------------");
System.out.println(" | 1 | 2 | 3 | 4 | 5 | 6 | 7 |");
return board;

}

public static  void move(int c) {
Scanner kb= new Scanner(System.in);

        if(player%2==0)

        {
               System.out.println("Player 1");
               System.out.println("Which column do you want to move?");
               do{
                      c = kb.nextInt();

                      if(c<0 || c>7){
                            System.out.println("Invalid, choose another column");

                      }
               }while(c<0 || c>7);
               c--;

               for(int r=5;r>-1;r--){
                      if(board[r][c] == ' '){
                             board[r][c]= color;
                             break;
                      }

                      else if(board[0][c]!=' '){
                            System.out.println("Invalid, Column full choose another column");
                             do{
                                   c = kb.nextInt();
                                   if(c<0 || c>7){
                                         System.out.println("Invalid, choose another column");
                             }
                             board[r][c-1]=color;

                             }while(c<0 || c>7);
                             break;

                      }
               }
        }

        else{
               System.out.println("Player 2");
               System.out.println("Which column do you want to move?");

               do{
                      c = kb.nextInt();
                      if(c<0 || c>7){
                            System.out.println("Invalid, choose another column");

                      }
               }while(c<0 || c>7);
               c--;

               for(int r=5;r>-1;r--){

                      if(board[r][c] == ' '){
                             board[r][c]= color;
                             break;
                      }

                      else if(board[0][c]!=' '){

                            System.out.println("Invalid, Column full choose another column");

                            do{
                                   c = kb.nextInt();

                                   if(c<0 || c>7){
                                         System.out.println("Invalid, choose another column");

                                   }
                                   board[r][c-1]= color;

                             }while(c<0 || c>7);
                             break;
                      }
               }
        }

        player++;
  }


public static void whichPlayer () {
if(player%2==0) {

System.out.println("Player 1's Turn");
color ='Y';
}
else {
System.out.println("Player 2's Turn");
color ='R';
}
}

public static boolean checkRedWin(char[][]b, int r, int c, char R) {
if((r+3)< b[0].length){
if((b[r][c]=='R')&&(b[r][c+1]=='R')&&(b[r][c+2]=='R')&&(b[r][c+3]=='R')) {

result1 = true;
redWins++;
System.out.println("Red is the winner!");
return true;

}
if((r+3)<b.length){
if((b[r][c]=='R')&&(b[r+1][c]=='R')&&(b[r+2][c]=='R')&&(b[r+3][c]=='R')) {

result1 = true;
redWins++;
System.out.println("Red is the winner!");
return true;
}
if ((r+3)<b.length &&((c+3)<b[0].length)){
if((b[r][c]=='R')&&(b[r+1][c+1]=='R')&&(b[r+2][c+2]=='R')&&(b[r+3][c+3]=='R')) {

result1 = true;
redWins++;
System.out.println("Red is the winner!");
return true;
}
}
if ((r+3)>0&&((c+3)<b[0].length)){
if((b[r][c]=='R')&&(b[r-1][c+1]=='R')&&(b[r-2][c+2]=='R')&&(b[r-3][c+3]=='R')) {

result1 = true;
redWins++;
System.out.println("Red is the winner!");
return true;
}

}
}
}
return false;
}

public static boolean checkYellowWin(char[][]b, int r, int c, char Y) {
if((r+3)< b[0].length){
if((b[r][c]=='Y')&&(b[r][c+1]=='Y')&&(b[r][c+2]=='Y')&&(b[r][c+3]=='Y')) {

result2 = true;
yellowWins++;
System.out.println("Yellow is the winner!");
return true;

}
if((r+3)<b.length){
if((b[r][c]=='Y')&&(b[r+1][c]=='Y')&&(b[r+2][c]=='Y')&&(b[r+3][c]=='Y')) {

result2 = true;
yellowWins++;
System.out.println("Yellow is the winner!");
return true;
}
if ((r+3)<b.length &&((c+3)<b[0].length)){
if((b[r][c]=='Y')&&(b[r+1][c+1]=='Y')&&(b[r+2][c+2]=='Y')&&(b[r+3][c+3]=='Y')) {

result2 = true;
yellowWins++;
System.out.println("Yellow is the winner!");
return true;
}
}
if ((r+3)>0&&((c+3)<b[0].length)){
if((b[r][c]=='Y')&&(b[r-1][c+1]=='Y')&&(b[r-2][c+2]=='Y')&&(b[r-3][c+3]=='Y')) {

result2 = true;
yellowWins++;
System.out.println("Yellow is the winner!");
return true;
}

}
}
}
return false;
}


public static boolean checkWinner(char[][]b) {

boolean red, yellow;
for (int r=0; r<b.length; r++) {
for (int c=0; c<b[0].length;c++) {

red = checkRedWin(displayBoard(b),r,c,'R');

            yellow = checkYellowWin(displayBoard(b),r,c,'Y');

            if(red==true || yellow==true) {

                   return true;

            }
}
}
return false;
}

public static void checkdraw(char[][]b){

     for(int r=0; r<b.length; r++){
         for(int c=0;c<b[0].length;c++){
                         if(b[r][c]!=' '){
                                System.out.println("The game is a draw!");
                                break;
                         }
                  }
           }
           }

public static void main(String[] args) {
// TODO Auto-generated method stub

System.out.println("Player 1 is: Y = Yellow");
System.out.println("Player 2 is: R = Red ");

int c=0;
int redWins=0, yellowWins=0;
int playAgain = 0;
int moves = 0;

do {
initboard(board);
displayBoard(board);
result1=false;
result2=false;
player=0;
do {

whichPlayer();
move(c);
checkWinner(board);
moves++;

        if(totalMoves==moves){
               checkdraw(board);
               break;
        }

} while(result1!= true && result2!= true);

System.out.println("Game Over!");
        System.out.println("Do you want to play again? 1 for Yes, 0 for No");

        playAgain = kb.nextInt();

        if(result1==true){
               redWins++;
        }
        System.out.println("Red wins: " + redWins);

        if(result2==true){
               yellowWins++;
        }
        System.out.println("Yellow wins: " + yellowWins);

} while(playAgain==1);
}
}