Thinking in Java 之 继承与初始化

class Insect{
private int i = 9;
protected int j;
Insect(){
System.out.println("i = " + i + ", j = " + j);
j = 39;
System.out.println("x1 = " + x1);
}

static int printInit(String s){                         //成员函数
System.out.println(s);
return 47;
}

private static int x1 = printInit("static Insect.x1 initialized");      //此时x1 = 47

}
public class example_272 extends Insect{
private int k = printInit("Beetle.k initialized");
public example_272(){
System.out.println("k = " + k);
System.out.println("j = " + j);

System.out.println("x2 = " + x2);
}
private static int x2 = printInit("static Beetle.x2 initialized");          //此时x2=47
public static void main(String args[]){
System.out.println("Beetle constructor");
example_272 b = new example_272();
}
}