日期:2014-05-20  浏览次数:20735 次

帮忙看下这个问题
代码来自thinking   in   java   3rd
想不通打印出来字符串的顺序

为什么先打印出Insect这个类中private   static方法的字符串
然后打印Bettle类里面的private   static   方法里的字符串
然后才执行main()   方法里的pringln   方法??
main()里的println语句在创建类的实例之前啊!!


import   com.bruceeckel.simpletest.*;

class   Insect  
{
protected   static   Test   monitor   =new   Test();
    private   int   i=9;
    protected   int   j;
    Insect   ()
    {
        System.out.println( "i= "+i+ ",j= "+j);
        j=39;
    }
    private   static   int   x1=print( "static   Insect.x1   initialized ");
    static   int   print(String   s)
    {
        System.out.println(s);
        return   47;  
    }

   
public   class   Beetle   extends   Insect
{
        private   int   k=print( "Veetle.k   intitialized ");
        public   Beetle()
      {
          System.out.println( "k= "+k);
          System.out.println( "j= "+j);
      }
        private   static   int   x2=print( "static   Beetle.x2   initialized ");
        public   static   void   main(String[]   args)
        {
            System.out.pringln( "Beetle   constructor ");
            Beetle   b=new   Beetle();
            monitor.expect(new   Beetle());
            monitor.expect(new   String[]{
            "static   Insect.x1   initialized ",
            "static   Beetle.x2   initialized ",
            "Beetle   constructor ",
            "i=9,j=0 ",
            "Beetle.k   initialized ",
            "k=47 ",
            "j=39 ",
            });
        }
}             ///:~




------解决方案--------------------
在载入Insect时,为了初始化静态变量int x1,要先调用print( "static Insect.x1 initialized ");取得返回值,完成初始化的