Byron Kiourtzoglou

About Byron Kiourtzoglou

Byron is a master software engineer working in the IT and Telecom domains. He is always fascinated by SOA, middleware services and mobile development. Byron is co-founder and Executive Editor at Java Code Geeks.

Compress a File in GZIP format in Java

In this tutorial we are going to see how you can compress a File in Java using the GZIP compression method.

So, to perform File compression using GZIP in Java, you have to:

  • Create a FileOutputStream to the destination file, that is the file path to the output compressed file.
  • Create a GZIPOutputStream to the above FileOutputStream.
  • Create a FileInputStream to the file you want to compress
  • Read the bytes from the source file and compress them using GZIPOutputStream.

Let’s take a look at the code snippet that follows:



public class CompressFileGzip {

	public static void main(String[] args) {

		String source_filepath = "C:\\Users\\nikos7\\Desktop\\files\\test.txt";
		String destinaton_zip_filepath = "C:\\Users\\nikos7\\Desktop\\files\\test.gzip";

		CompressFileGzip gZipFile = new CompressFileGzip();
		gZipFile.gzipFile(source_filepath, destinaton_zip_filepath);

	public void gzipFile(String source_filepath, String destinaton_zip_filepath) {

		byte[] buffer = new byte[1024];

		try {
			FileOutputStream fileOutputStream =new FileOutputStream(destinaton_zip_filepath);

			GZIPOutputStream gzipOuputStream = new GZIPOutputStream(fileOutputStream);

			FileInputStream fileInput = new FileInputStream(source_filepath);

			int bytes_read;
			while ((bytes_read = > 0) {
				gzipOuputStream.write(buffer, 0, bytes_read);



			System.out.println("The file was compressed successfully!");

		} catch (IOException ex) {



The file was compressed successfully!

This was an example on how to compress files in Java with the GZIP method.

Related Whitepaper:

Java Essential Training

Author David Gassner explores Java SE (Standard Edition), the language used to build mobile apps for Android devices, enterprise server applications, and more!

The course demonstrates how to install both Java and the Eclipse IDE and dives into the particulars of programming. The course also explains the fundamentals of Java, from creating simple variables, assigning values, and declaring methods to working with strings, arrays, and subclasses; reading and writing to text files; and implementing object oriented programming concepts. Exercise files are included with the course.

Get it Now!  

Examples Java Code Geeks and all content copyright © 2010-2014, Exelixis Media Ltd | Terms of Use | Privacy Policy
All trademarks and registered trademarks appearing on Examples Java Code Geeks are the property of their respective owners.
Java is a trademark or registered trademark of Oracle Corporation in the United States and other countries.
Examples Java Code Geeks is not connected to Oracle Corporation and is not sponsored by Oracle Corporation.

Sign up for our Newsletter

20,709 insiders are already enjoying weekly updates and complimentary whitepapers! Join them now to gain exclusive access to the latest news in the Java world, as well as insights about Android, Scala, Groovy and other related technologies.

As an extra bonus, by joining you will get our brand new e-books, published by Java Code Geeks and their JCG partners for your reading pleasure! Enter your info and stay on top of things,

  • Fresh trends
  • Cases and examples
  • Research and insights
  • Two complimentary e-books