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Another garbage collection question

Another garbage collection question# Java - 爪哇娇娃

R*Z2004-12-03 08:12

1 楼

In Java, suppose obj A has a reference to obj B, obj B has a reference to obj
C, and obj C has a reference to obj A. And no one else has any reference to
these 3 objs. So each of them has a reference count of 1. But they should
really be GCed because they are not reachable by any means. How does the
garbage collector know these 3 objs can be GCed? Thanks.

m*t2004-12-03 08:12

2 楼

obj
JVM does not use reference counting-based GC. These object would be GC'ed
without any problem.

【在 R***Z 的大作中提到】

: In Java, suppose obj A has a reference to obj B, obj B has a reference to obj
: C, and obj C has a reference to obj A. And no one else has any reference to
: these 3 objs. So each of them has a reference count of 1. But they should
: really be GCed because they are not reachable by any means. How does the
: garbage collector know these 3 objs can be GCed? Thanks.

g*g2004-12-03 08:12

3 楼

http://www.brpreiss.com/books/opus5/html/page424.html
Algorithm like mark and sweep, does the job.
Note Java standard didn't specify how JVM should implement
its recycle scheme.

【在 m******t 的大作中提到】

:
: obj
: JVM does not use reference counting-based GC. These object would be GC'ed
: without any problem.