get object by hexadecimal address in jstack

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Hi,

I use jstack PID command on my program in java and I got this output.

"MapOutputCopier attempt_201108092223_0002_r_000013_1_0.2" prio=10 tid=0x00007f565c0b4000 nid=0x5f92 in Object.wait() [0x0000000041840000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
at java.lang.Object.wait(Object.java:485)
at org.apache.hadoop.mapred.ReduceTask$ReduceCopier$MapOutputCopier.run(ReduceTask.java:1276)
- locked <0x00007f5668a910c0> (a java.util.ArrayList)

At one line, I've got " - locked <0x00007f5668a910c0> (a java.util.ArrayList)". I'd like to know what this hexadecimal address points to, to know which arraylist is . Is this possible?

Thanks,