caching - How java.uitl.zip.ZipFile caches files in java -


when run following code first time, running 25000ms(i.e. 25 sec) second time onward taking 24ms(i.e. 0.024 sec) closed eclipse , reopen run. till restart machine again, takes 24ms only. article http://www.oracle.com/technetwork/articles/java/compress-1565076.html says java.uitl.zip.zipfile caches. how? caches? how can clear cache?

public class sample {     public static void main(string[] args) throws zipexception, ioexception     {         long st = system.currenttimemillis();         file dir = new file("c:/temp/packages");         file[] files = dir.listfiles();         for(file file : files) {             zipfile zfile = new zipfile(file);         }         long et = system.currenttimemillis();         system.out.println(et - st);     } }

close zipfile using zipfile.close.


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