Java类（继承）初始化顺序详解编程语言

/** 
 * Created by xfyou on 2016/11/2. 
 * Java继承的初始化 
 */ 
public class Beetle extends Insect { 
    int k = prt("Beetle.k initialized"); 
 
    public Beetle() { 
        prt("k = " + k); 
        prt("j = " + j); 
    } 
 
    static int x2 = prt("static Beetle.x2 initialized"); 
 
    static int prt(String s) { 
        System.out.println(s); 
        return 63; 
    } 
 
    public static void main(String[] args) { 
        prt("Beetle constructor"); 
        Beetle b = new Beetle(); 
    } 
} 
 
class Insect { 
    int i = 9; 
    int j; 
 
    public Insect() { 
        prt("i = " + i + ", j = " + j); 
        j = 39; 
    } 
 
    static int x1 = prt("static Insect.x1 initialized"); 
 
    static int prt(String s) { 
        System.out.println(s); 
        return 47; 
    } 
}