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Mark and Sweep

 
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On what concept garbage collector works ?
What is the concept of memory sweep?




please ranchers explain this concept in brief


Thanks in advance
 
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It is not specified how GC works. You can not be sure about that. You can read somewhere that it uses for example mark&sweep algorithm but it is not obligatory.
 
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Well from java5.0, automatic garbage collection has taken effect so the garbage collection is under the control of the JVM. Well i guess the memory sweeping concept is out of question now.
 
Lucas Smith
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So what was before Java 5?
 
Nitish Bangera
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Before that java5, garbage collection could be done manually i suppose but it wasn't automatic. Well some info on the history of garbage collection could be found here .
 
Lucas Smith
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Thanks for interesting link.
 
Dinesh Tahiliani
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In simple what does mark does and sweep does?
Please answer .
 
Java Cowboy
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Nitish Bangera wrote:Before that java5, garbage collection could be done manually i suppose but it wasn't automatic.


Garbage collection has always been automatic in Java, it has never been the case that you had to call the garbage collector explicitly to do garbage collection, not even in Java 1.0.

It's interesting to know how garbage collection (note the link) works, but you do not need to know such internal implementation details of the JVM for the SCJP exam.
 
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