How to divide a file into blocks in java

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Asked 3 years, 11 months ago. Active 3 years, 11 months ago. Viewed 15k times. So I will keep creating multiple files for each clientId until I can fit all the data in it and also making sure each file size is not more than bytes. Improve this question. UTF-8 uses bytes per character I think. Show 3 more comments. Active Oldest Votes. It should rather set the size to said length - or - accumulate the "byte length" of the String for each Task which, in combination with instantiating sb with an appropriate length, should lead to run time linear in the number of bytes in each file rather than quadratic.

Improve this answer. Add a comment. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. This just says copy from Channel, put it on 'position' with a size of 'count'.

Java 7 gives some useful methods in java. Files and java. Paths like Files. For the test, we used two files, a small 5,, bytes 5. We ran each version twice with the files.

The following charts are presented in logarithmic scale time is displayed in seconds and memory is displayed in megabytes. As we can see, the memory consumption is greatly reduced.

As for time, it is almost the same for every version. For small files, the time increases, but this should not concern us because it is very unlikely that we would need to divide a small 10 or 20 MB file. In case we need to do maintenance or implement this into an old system, Java 1. Paths are from Java 7 and you can probably implement a similar solution for an old legacy system.

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