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Garbage collection explanation

 
Ranch Hand
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//after line 6,how many objects are eligible for garbage collection
1)0
2)1
3)2
4)3
5)4

Answer is 2)1.I would like to know my understanding is correct.
x reference has object Java_StudyNotes()
x2 reference has object Java_StudyNotes()------------------this line is GC after x2=x4
x4 reference has object Java_StudyNotes()
After executing x2=x4; both x2 and x4 reference Java_StudyNotes.

Please coorect me,if I am wrong .
 
Greenhorn
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I think, you are right.
 
Shiva Mohan
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Thanks for the reply.
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