Java ZIP Examples : How To Compress Byte Array Using Deflater Class

Intro

This examples, will show how to compress a byte array using Deflater class.

Example

package com.freesamplecode.java.zip;

import java.io.ByteArrayOutputStream;
import java.util.zip.Deflater;

public class CompressByteArrayDeflaterDemo {
	public static void main(String[] args){
		String str = "This tutorials will demonstrates how to compress a byte array using Deflater class";
		
		//get byte a string str
		byte[] bytes = str.getBytes();
		
		//create a deflater object
		Deflater deflater = new Deflater();
		
		deflater.setInput(bytes);
		
		deflater.finish();
		
		ByteArrayOutputStream baos = new ByteArrayOutputStream(bytes.length);
		
		byte[] buffers = new byte[2048];
		
		while(!deflater.finished()){
			int byteCompressed = deflater.deflate(buffers);
			baos.write(buffers, 0, byteCompressed);
		}
		
		byte[] byteCompressedArray = baos.toByteArray();
		
		System.out.println("Size of original byte array : "+bytes.length);
		System.out.println("Size of compressed byte array : "+byteCompressedArray.length);
	}
}

Output

Size of original byte array : 82
Size of compressed byte array : 76

Screenshot

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