1 package com.java.test; 2  3 import java.util.Random; 4  5 class Insect{ 6     //8.初始化基本类型变量i 7     private int i=9; 8     //(j没有初始化，不访问) 9     protected int j;10     public Insect() {11     //10.访问基类构造器12         System.out.println("i="+i+",j="+j);13         j=39;14         System.out.println("x1="+x1);15     }16     //9.初始化基本类型变量l17     private int l=10;18     //2.首先访问基类的static变量x1-调用静态方法19     private static int x1=printInit("static.x1 initialized.");20         static int printInit(String s){21         System.out.println(s);22         return new Random().nextInt(10)+1;23     }24     //3.依次初始化static块和static变量25     static {26         int z1=1;27         int z2=2;28     }29     static int y1=1;30     31 }32 33 public class JavaTest extends Insect{34     //11.初始化导出类基本变量k35     private int k=printInit("JavaTest.k initialized.");36     public JavaTest(){37     //13.访问导出类构造器38         System.out.println("k="+k);39         System.out.println("j="+j);40         System.out.println("x2="+x2);41     }42     //4.访问导出类的static变量x2-调用静态方法43     private static int x2=printInit("static.x2 initialized.");44     //5.依次初始化static变量和static块45     static int y2=2;46     static {47         int z3=1;48         int z4=1;49     }50     //12.初始化导出类基本变量p51     private int p=3;52 53     //1.寻找main入口，找出JavaTest类的编译代码(JavaTest.class文件中)54     public static void main(String[] args) {55         //6.进入main方法内部56         System.out.println("JavaTest constructor.");57         //7.初始化类58         JavaTest test= new JavaTest();59         //14.结束60     }61 }

 

输出:

static.x1 initialized.

static.x2 initialized.

JavaTest constructor.

i=9,j=0

x1=3

JavaTest.k initialized.

k=3

j=39

x2=6