单选题

下面java程序的运行结果是 class A { static ...

Question

下面java程序的运行结果是

class A {
    static {
        System.out.print("A")
    }
    public A() {
        System.out.print("a")
    }
    void say() {
        System.out.print("1")
    }
}
class B extends A {
    static {
        System.out.print("B")
    }
    public B() {
        System.out.print("b")
    }
    void say() {
        System.out.print("2")
    }
}
public class Hello {
    public static void main(String[] args) {
        A ab = new B()
        ab.say()
        ab = new B()
        ab.say()
    }
}

A. ABab2ABab2

B. AaBb1AaBb2

C. ABab1ab2

D. ABab2ab2