我不明白如何在四连冠中找到获胜方式，请告诉我应该怎么想以及如何在四连冠中找到赢家。我应该如何使用for循环来找到他们。我应该如何使用方法寻找赢家？

import java.util.Scanner;
public class Connect4{
    public static  int[][] arrayboard(){
        int [][] board = new int[6][7];
        for (int i=0;i<board.length;i++){
            for(int j=0;j<board[i].length;j++){
              }
            }
          return board;     
         }
    public static void printboard(int[][] board){
            int k=5;
            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.print("|"+k );
             k--;
             System.out.println();
          }
            System.out.println("--------------+");
            System.out.println("0 1 2 3 4 5 6");
       }
     public static void player1(int[][] board){
        System.out.print("player 1 type a column(0-6) or 9 to quit current game:");
        Scanner input = new Scanner(System.in);
        int column=input.nextInt();
        for (int i=5;i>=0;i--){
            if(board[i][column]==0){
               board[i][column]=1;
               break;
            }
          }
       }
     public static void player2 (int[][] board){
        System.out.print("player 2 type a column(0-6) or 9 to quit current game:");
        Scanner input = new Scanner(System.in);
        int column=input.nextInt();
        for (int i=5;i>=0;i--){
            if (board[i][column]==0){
               board[i][column]=2;
               break;
           }
        }
     }
    public static void main(String[] args) {
        int [][] board=arrayboard();
           printboard(board);
        boolean loop= true;
              int count=0;
         while(loop){
            if (count % 2 == 0) 
                player1(board);
            else player2(board);
            count++;
            printboard(board);
      }
   }
}