你可能感興趣的試題

1.public class GC{
2.private Objec to；
3.private void doSomethingElse（Object obj）{o=obj；}
4.public void doSomething（）{
5.Object o=new Object（）；
6.doSomethingElse（o）；
7.o=new Object（）；
8.doSomethingElse（null）；
9.o=null；
10.}
11.}
When the doSomething method is called，after which line does the Object created in line 5 become available for garbage collection？（）

11.class Snoochy{
12.Boochybooch；
13.public Snoochy（）{booch=newBoochy（this）；}
14.}
15.
16.class Boochy{
17.Snoochy snooch；
18.public Boochy（Snoochys）{snooch=s；}
19.}
And the statements：
21.public static void main（String[]args）{
22.Snoochy snoog=new Snoochy（）；
23.snoog=null；
24.//more code here
25.}
Which statement is true about the objects referenced by snoog，snooch，and booch immediately after line 23 executes？（）