????1  ????????μ?Java????????
class Sample
{
Sample(String s)
{
System.out.println(s);
}
Sample()
{
System.out.println("Sample????????????????");
}
}
class Test{
static Sample sam=new Sample("??????sam?????");
Sample sam1=new Sample("sam1????????");
static{
System.out.println("static?????");
if(sam==null)System.out.println("sam is null");
sam=new Sample("???????????sam???????");
}
Test()
{
System.out.println("Test??????????????");
}
}
//??????
public static void  main(String  str[])
{
Test a=new Test();
}
?????????????
??????????sam?????     -----???????????
????static?????          -----????鱻???
???????????????sam??????? ----????????
????sam1????????      -----???????????
????Test??????????????  -----?????????
??????????ó??????
????a ???????????????????????Static?????????????????????????????????????????????й??
????b ???????????
????c ??й???????