public void showField() {
        for (int i = 0; i < field.sizeField; i++) {
            System.out.print("  " + (i + 1) );
        }
        System.out.println();
        for (int i = 0; i < field.sizeField; i++) {
            System.out.print(i + 1);
            for (int j = 0; j < field.sizeField; j++) {
                switch(field.f1.get(j).get(i)) {
                    case empty: {
                        System.out.print("[ ]"); break;
                    }
                    case x:{
                        System.out.print("[X]"); break;
                    }
                    case o: {
                        System.out.print("[O]"); break;
                    }
                }
            }
            System.out.println();
        }
        System.out.println();
    }