memory management - Java input = "" isn't the same as input = null? -

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I am running a J2ME application and in some serious memory problems.
So, to clarify, I have processed a large input string and its data in another step and clean it. But as long as I did not set input = null and the problem is not resolved by input = "" Done

Should not it be in the context of memory management? Can anyone tell me the difference please?

Thanks, RAIT 

 for  (int x = 0; x & lt; = ChunksPartCount; x ++) {_model.setLoading_bar_progress (x * ChunkSize)); Input + = web_service.FullCompanyListChunksGet (X, Chunky); If ((x * chancishey)> 5000) {readXML (input); Input = null; }}

Edit:
Still as a solution I want to flag an answer. I think the comments of mmers are going in the right direction.

Each variable is actually "data" in memory.

Input = "" assigns input to string object. There is a length (0) and an empty array, as well as some other figures associated with it.

input.length () will return 0 at this point.

Input = Null indicates the input point "invalid" is a special type of case that means that this indicator is nothing, it has been assigned.

input.length () will throw an exception now because you are calling. nothing.


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