This is a simple class that decompresses any known archive file. You just have to provide the path of the file to decompress. I wrote this code as I saw a post in Google+ who wanted to know how to decompress a file. So I thought, "well, lets try to write one!". Though its a small code, I confess, I had to struggle a bit. Happy Coding.

Decompresser.java

package com.gplus;

import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.Scanner;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

public class Decompresser{

  public static void main(String[] args) throws Exception {
		int temp = 0;
		System.out.println("Please enter the path of the Zip File along with the file name and file extension:");
		Scanner in = new Scanner(System.in);
		String fileName = in.nextLine();
		ZipFile zipFile = new ZipFile(fileName);
		int lastIndex = fileName.lastIndexOf(".");
		int beginIndex = fileName.lastIndexOf("\\");
		//Construct destination Dir for uncompressing the file
		String destDir = new String((String) fileName.subSequence(0, beginIndex-1));
		//Construct the destination file name				
		String destFileName = (String) fileName.subSequence(beginIndex, lastIndex);
		
		//Create the uncompression Dir
		new File(destDir + "\\" + destFileName).mkdirs();

		System.out.println("Uncompressing archive at: " + destDir + "\\" + destFileName);
		
		//Start reading through the archive and create the files in it
		Enumeration<? extends ZipEntry> zipEntries = zipFile.entries();
		while (zipEntries.hasMoreElements()) {
			ZipEntry zipEntry = (ZipEntry) zipEntries.nextElement();
			if(zipEntry.isDirectory())
			{
				new File(destDir + "\\" + destFileName + "\\" + zipEntry.getName()).mkdirs();
				continue;
			}
			InputStream input = zipFile.getInputStream(zipEntry);
			FileOutputStream fo = new FileOutputStream(new File(destDir + "\\" + destFileName + "\\"
					+ zipEntry.getName()));			
			while ((temp = input.read()) != -1)
			{
				fo.write(temp);
				temp = 0;
			}
			fo.flush();
			fo.close();
			input.close();
		}
	}
}