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Editorial Team
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Asked: 2026-05-21T22:57:33+00:00

First please dont overlook because you might think it as common question, this is

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First please dont overlook because you might think it as common question, this is not. I know how to find out size of file and directory using file.length and Apache FileUtils.sizeOfDirectory.

My problem is, in my case files and directory size is too big (in hundreds of mb). When I try to find out size using above code (e.g. creating file object) then my program becomes so much resource hungry and slows down the performance.

Is there any way to know the size of file without creating object?

I am using
for files File file1 = new file(fileName); long size = file1.length();

and for directory, File dir1 = new file (dirPath); long size = fileUtils.sizeOfDirectiry(dir1);

I have one parameter which enables size computing. If parameter is false then it goes smoothly. If false then program lags or hangs.. I am calculating size of 4 directory and 2 database files.

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1 Answer

  1. Editorial Team

    Answering my own question..

    This is not the best solution but works in my case..

    I have created a batch script to get the size of the directory and then read it in java program. It gives me less execution time when number of files in directory are more then 1L (That is always in my case).. sizeOfDirectory takes around 30255 ms and with batch script i get 1700 ms.. For less number of files batch script is costly.

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