java类初始化的顺序

<p>无意中在csdn的论坛看到这样一个程序段：<br>class Singleton { <br><br>　private static Singleton obj = new Singleton(); <br><br>　public static int counter1; <br><br>　public static int counter2 = 0; <br><br>　private Singleton() { <br><br>　　counter1++; <br><br>　　counter2++; <br><br>　} <br><br>　public static Singleton getInstance() { <br><br>　　return obj; <br><br>　} <br><br>} <br>public class MyMain { <br><br>　public static void main(String[] args) { <br><br>　　Singleton obj = Singleton.getInstance(); <br><br>　　System.out.println("obj.counter1=="+obj.counter1); <br><br>　　System.out.println("obj.counter2=="+obj.counter2); <br><br>　} <br><br>} </p>
<p><br>结果：<br>obj.counter1==1<br>obj.counter2==0</p>
<p></p>
<p></p>
<p></p>