java - If I keep an objects of InputStream into the memory then does it mean I am storing the whole file into the memory? -

i have class sample has 2 constructor. 1 takes object of file whereas takes inputstream.

package org.xyz.core;      import java.io.file;     import java.io.inputstream;      /**      * created ashish pancholi on 26-03-2016.      */     public class sample {          file file;          public sample(file file){             this.file=file;         }          public sample(inputstream inputstream){             this.file = createfilefrominputstream(inputstream);         }     } 

and using linkedblockingqueue consumes object of sample , has depth of 10000;

blockingqueue<string> queue   = new linkedblockingqueue<sample>(10000); 

let's assume 2 cases here:

case a: initialize many instances of sample class passing inputstream arguments , pushed these objects linkedblockingqueue.

case b: initialize many instances of sample class passing file object arguments , pushed these objects linkedblockingqueue.

in case program take more memory? if keep objects of inputstream memory mean storing whole file memory? if have many large files?

updated:

please note: creating inputstream way:

inputstream = new tararchiveinputstream(new gzipinputstream(new bufferedinputstream(new fileinputstream(file)))); 

it depends.

an inputstream can buffered or non-buffered, store entire file internally or nothing, it's free of that. there may native resources associated them.

there more fundamental problem pattern though: inputstreams make sense part of process reads them. storing them en masse bad idea because:

1. they aren't thread-safe. (multiple threads reading inputstream end in tears.)
2. if we're talking fileinputstreams, keep file open , may run out of file descriptors.