关于JAVA中继承相关面试extends

如题，面试题以下：

请输入下面代码的运行结果--------extends-----------

class HelloA {
public HelloA(){
	System.out.println("HelloA");
}
{System.out.println("I'm A class");}
static{System.out.println("static A");}	
}

public class HelloB extends HelloA{

	public HelloB(){
		System.out.println("HelloB");
	}
	{System.out.println("I'm B class");}
	static{System.out.println("static B");}
	
	public static void main(String[] args) {
		new HelloB();
	}
}

运行结果以下：

</pre><pre name="code" class="java">static A
static B
I'm A class
HelloA
I'm B class
HelloB