Java虚拟机类加载机制

前言

在介绍java虚拟机的类加载机制之前我们先看两道题目，如果你对这两道题目都能正确写出结果，那就说明你对java虚拟机类加载过程比较熟悉
一

public class SSClass
{
    static
    {
        System.out.println("SSClass");
    }
}    
public class SuperClass extends SSClass
{
    static
    {
        System.out.println("SuperClass init!");
    }
    public static int value = 123;

    public SuperClass()
    {
        System.out.println("init SuperClass");
    }
}
public class SubClass extends SuperClass
{
    static 
    {
        System.out.println("SubClass init");
    }
    static int a;
    public SubClass()
    {
        System.out.println("init SubClass");
    }
}
public class NotInitialization
{
    public static void main(String[] args)
    {
        System.out.println(SubClass.value);
    }
}

二

public class Text {
    public static int k =0 ;
    public static Text t1 = new Text("t1") ;
    public static Text t2 = new Text("t2") ;
    public static int i = print("i") ;
    public static int n =99 ;
    public int j = print("j") ;
    {
        print("构造块");
    }
    static {
        print("静态块");
    }
    public Text(String str){
        System.out.println((++k)+":"+str+"   i="+i+"    n="+n) ;
        ++i;++n ;
    }
    public static int print(String str){
        System.out.println((++k)+":"+str+"   i="+i+"    n="+n) ;
        ++n;
        return ++i ;
    }
    public static void main (String args[]){
         Text t = new Text("init") ;
    }
}

接下来我们将聊一聊java虚拟机的加载过程