Overview

The main purpose of the Java FileOutputStream class is to write data to a  file in the file system. The FileOutputStream is a subclass of OutputStream. OutputStream is an abstract superclass.

 

 

Constructors

The most used constructors of the class are as follows:

public FileOutputStream(String name) throws FileNotFoundException

public FileOutputStream(File file) throws FileNotFoundException

public FileOutputStream(String name, boolean append) throws FileNotFoundException

public FileOutputStream(File file, boolean append)
throws FileNotFoundException

The boolean value is for appending the new data to the existing file data. The old data in the file will not be deleted if the append boolean value is true.

Methods

The most important methods of the class are:

write() – This method is used to write the byte to the file output stream.

write( byte[] ) – This method is used to write the bytes from the specified byte array to the file output stream.

Example

The below example is to create an object for the class.

FileOutputStream fos = new FileOutputStream(“output.txt”);

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Java Tutorials

Java Tutorial on this website:

https://www.testingdocs.com/java-tutorial/

For more information on Java, visit the official website :

https://www.oracle.com/java/