Dataoutputstream file

Writes the specified byte the low eight bits of argument b to the underlying output stream. Exception : IOException Method void writeDouble double v Converts the double argument to a long using the doubleToLongBits method in class Double, and then writes that long value to the underlying output stream as an 8-byte quantity, high byte first.

Exception thrown: IOException Method writeInt Writes an int to the underlying output stream as four bytes, high byte first. Return Type: Void Exceptions Thrown: Writes an int to the underlying output stream as four bytes, high byte first.

Method writeLong Writes a long to the underlying output stream as eight bytes, high byte first. Throws: IOException Method writeShort : Writes a short to the underlying output stream as two bytes, high byte first. Skip to content. Change Language.

Related Articles. Table of Contents. Improve Article. Save Article. Below is an example to illustrate the implementation of various Java DataOutputStream class methods. There are separate methods to write values of different data types. For eg: writeInt for writing integers, writeChar for a character, writeDouble for double, writeFloat for float, writeBoolean for boolean, writeUFT for a string in Unicode format, writeLong for writing long numbers, writeByte for Byte values, writeChars for writing characters as a string, etc.

Connect and share knowledge within a single location that is structured and easy to search. So currently, I am trying to have my TCP program read a file from a directory this is server side , and then send that file over to the socket that requested it the client. So how can I use a DataOutputStream to send any kind of file from my server to my client, and how can my client catch that file using DataInputStream and save it to disk?

For sample code, checkout the sample class shown in this lecture notes. Anything over the network is 1s and 0s i. Let's say you want to transfer an image from one server to another then the recommended way is for the server to read the file contents as bytes java.

On the client side, read all the bytes from socket using BufferedReader in practical projects and write them to disk. You have to make sure both server and client are using the same encoding. This will work for any file type - mp3, mp4, jpeg, png, acc, txt, java. To have it usable in client system, make sure to create a file with the correct extension. Here as an example a simple server, which sends a binary file to each client without further interaction. The socket provides the output stream to write bytes to the client.

We have a file "picin. I extracted the copy method to a util class, because we need the exact same in the client. We use a small byte array as a buffer and copy one chunk after another from one stream to the other. The client opens a connection to the server and write the received bytes to a file. The socket provides the input stream with the bytes coming from the server. We use the same Util. Note: The streams are closed automatically by the try-with-ressources statement. The sockets are closed while the corresponding streams are closed.

Java 8 includes some convenience methods to copy bytes from a file to an output stream or from an input stream to a file. See java. How are we doing? Please help us improve Stack Overflow. Take our short survey. 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. Asked 4 years, 3 months ago. Active 4 years, 3 months ago.