java - 如何编写静态值返回方法

Question

它没有返回并且想要返回一些东西它出什么问题了 ？为什么当我想从这个 boolean 方法返回时它要求我返回我刚刚在方法主体中设置了返回

  public static Boolean winner(char[][] board) {
                if ((board[0][0] == board[0][1] && board[0][0] == board[0][2])
                        || (board[0][0] == board[1][1] && board[0][0] == board[2][2])
                        || (board[0][0] == board[1][0] && board[0][0] == board[2][0])
                        || (board[2][0] == board[2][1] && board[2][0] == board[2][2])
                        || (board[2][0] == board[1][1] && board[0][0] == board[0][2])
                        || (board[0][2] == board[1][2] && board[0][2] == board[2][2])
                        || (board[0][1] == board[1][1] && board[0][1] == board[2][1])
                        || (board[1][0] == board[1][1] && board[1][0] == board[1][2])) {
                    return true;
                } else if (true) {
                    for (int i = 0; i < board.length; i++) {
                        for (int j = 0; j < board[0].length; j++) {
                            if (board[i][j] == 'O' || board[i][j] == 'X') {
                                System.out.println("Game Over ");
                                return false;
                            }
                        }
                    }

                }

            }

Answer 1

else if(true) 是不必要的。如果“如果”是真的，你就回来了。除此之外，只有当嵌入到两个循环中的 if 为 true 时，才返回第二个 block 。您需要在循环后返回一些内容。