Java bytes from file

And I moved the ugly part into a separate message I would hide in some FileUtils class ;. Reads this stream completely into a byte array. Note : It is the caller's responsibility to close this stream. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. File to byte[] in Java Ask Question.

Asked 12 years, 8 months ago. Active 6 months ago. Viewed 1. How do I convert a java. File to a byte[]? Duncan Jones Ben Noland Ben Noland One use that I can think of is reading serialized objects from file.

Another is to find the file type using the header. Add a comment. Active Oldest Votes. Example: import java. File; import java. You can get a Path from a File. How is the file closing handled in java. This now works on Android if targeting SDK version 26 and higher.

Show 3 more comments. I'd rather have some extra lines of code than yet another dependency. Dependencies have hidden costs. You need to stay up to date with that library, include the dependency in your build scripting etc, communicate it to people using your code etc etc.

If you are already using a library that has code for it than use that, otherwsie I would say write it yourself. This answers the question of how to read a file, but not the question of how to convert an object of type java. File to byte[]. How is this used to read a File to byte[]? See other answers, e. Simple, no dependency.

Show 4 more comments. Community Bot 1 1 1 silver badge. Paulius Matulionis Paulius Matulionis This is now a better choice than the accepted answer, which requires Apache Commons. In Android, it requires min API level to be You'll need to add import java. Files; and import java. Please use ide. Load Comments. What's New. Most popular in Java. Most visited in Java Programs. We use cookies to ensure you have the best browsing experience on our website. Start Your Coding Journey Now!

It reads the text from a character input stream. It does the buffering of characters, arrays and lines for efficient reading. FileReader is used for reading streams of characters. For reading streams of raw bytes, try using a FileInputStream. Internally it uses BufferedReader to read the file. Find centralized, trusted content and collaborate around the technologies you use most.

Connect and share knowledge within a single location that is structured and easy to search. Remember to change the bytes from null to correspond to your byte array. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Convert bytes[] to 'File' in Java [duplicate] Ask Question. Asked 7 years, 8 months ago.

Active 4 months ago. Viewed 66k times. Peter Mortensen