Java FileOutputStream Class

Java FileOutputStream is an output stream used for writing data to a file.

If you have to write primitive values into a file, use FileOutputStream class. You can write byte-oriented as well as character-oriented data through FileOutputStream class. But, for character-oriented data, it is preferred to use FileWriter than FileOutputStream.

FileOutputStream class declaration

Let's see the declaration for Java.io.FileOutputStream class:

FileOutputStream class methods

Java FileOutputStream Example 1: write byte

Output:

Success... 

The content of a text file testout.txt is set with the data A.

testout.txt

A 

Java FileOutputStream example 2: write string

Output:

Success... 

The content of a text file testout.txt is set with the data Welcome to javaTpoint.

testout.txt

Welcome to javaTpoint.