Java继承结构中类的初始化

不行怎么行,这是基础。下面程序请先分析，如果结果(用白色字体是输出结果)正确，说明您对java类的初始化已经很熟悉，算是过关，如果没有，那赶紧复习吧。

package nie.test.extend;


public class Test {
public static void main(String[] args) {
new Son("s");
}
}

class Father {
static protected String s = "father_static_property_string"; //1
protected String b = "father_normal_property_string"; //5
static {
s = "o"; //2
System.out.print("d");
System.out.print(s);
}
{
b="r"; //6
System.out.print("a");
System.out.print(b);
}

Father() {
this("@");
System.out.print("1"); //8
}

Father(String s) {
System.out.print(s); //7
}
}

class Son extends Father {
public static String s = "son_static_property_string"; //3
public String b = "son_normal_property_string"; //9
static {
s = "j"; //4
System.out.print("t");
System.out.print(s);
}
{
b = "3"; //10
System.out.print("6");
System.out.print(b);
}

Son() {
System.out.print("."); //11
}

Son(String s) {
this();
System.out.print("com"); //12
}
}

测试完自己的输出，可以用鼠标选中下一行，检查。