Подскажите пожалуйста, где тут ошибка?

Question

class A {
public static int a = 0; A() {
a++;
}
}
...
A x = new A(); A y = new A(); int q ;
for (int i=0;i< 5; i++) {
q=(i>2)?++x.a:y.a++; System.out.print(q);

Answer 1

Share the full cods with saving in playground..
How you run code without main class?

Answer 2

result is "23467" but it is not wrong
because A.a is static
x.a is same as y.a

start with a=0
constructor by create x do a++ so a=1
constructor by create y do a++ so a=2
for()
i=0; q=y.a; q=2; a++; a=3
print(q): 2
i=1; q=y.a; q=3; a++; a=4
print(q): 23
i=2; q=y.a; q=4; a++; a=5
print(q): 234

i=3; ++x.a; a=6; q=x.a; q=6;
print(q): 2346
i=4; ++x.a; a=7; q=x.a; q=7;
print(q): 23467