Write file to outputstream

It will run slower for large-sized files. To better performance, you should use the BufferedOutputStream class instead. Just like BufferedInputStream , it uses an internal buffer of size 8KB can be customized to store the data and only writes to the disk when the buffer is full. To write to a file with different character encoding scheme , you should use the OutputStreamWriter class to wrap the FileOutputStream object:.

If you are using Java 8 or higher, you can the Files. Follow me on Twitter and LinkedIn. What is meant by storing data to files? Through the above image, we can understand that when we run the java program, the data is stored in the RAM. Now, suppose the variable data stored in RAM, we want to access that data and bring it to a file in our hard disk. So, we will create an object of OutputStream in the RAM and that will point to a file referencing to hard disk. FileOutputStream File file : Creates a file output stream to write to the file represented by the specified File object.

FileOutputStream File file, boolean append : Creates a file output stream object represented by specified file object. FileOutputStream FileDescripter fdobj : Creates a file output stream for writing to the specified file descriptor, which represents an existing connection with the actual file in the file system. FileOutputStream String name : Creates an object of file output stream to write to the file with the particular name mentioned.

FileOutputStream String name, boolean append : Creates an object of file output stream to write to the file with the specified name. Then, to write data to the file, we should write data using the FileOutputStream as, fout.

Before running the program After running the program myfile. Some important Methods 1. Write Method: write : this writes the single byte to the file output stream. Add a comment. Active Oldest Votes. Improve this answer. Rob Hruska k 28 28 gold badges silver badges bronze badges.

AlexR AlexR k 14 14 gold badges silver badges bronze badges. Bozho it has a very huge downside, i will have to fight with my boss, because of it. Show 1 more comment. Which wraps the output stream in a channel.

It is still talking to an underlying ByteArrayOutputStream. There is no efficiency gain in this situation. It is pointless. JerylCook I addessed that in comments five and a half years ago and have so far attracted 5 comment votes for having done so. File copy in Java - Benchmark In general, a FileChannel with a K byte array which is read through a wrapped ByteBuffer and written directly from the byte array is the fastest way. BalusC BalusC 1. The first link actually seems to recommend an 8K buffer since the time to copy difference between 8 and K is minimal.

That seems to make sense given that most file systems still use 4KB pages and 4KB disk clusters. Difference is indeed minimal. OP is however asking for "effective way" not "efficient way".

What about using channels and Channel. IAdapter In general, using transferTo will give the best performance; unfortunately, the Servlet API doesn't expose the SocketChannel , so the optimization isn't available.