下面程序结果为：(     )

class Banana2 {
    static int x = 2;
    public static void main(String[] args) {
        int x = 2;
        Banana2 b = new Banana2();
        b.go(x);
    }
    static {
        x += x;
    }
    void go(int x) {
        ++x;
        System.out.println(x);
    }
}