import java.io.BufferedInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.FileSystem;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

public class Main 
{
	public static void main(String[] args) 
	{
		//Open the file 
		try(ZipFile file = new ZipFile("files.zip"))
		{
			FileSystem fileSystem = FileSystems.getDefault();
			//Get file entries
			Enumeration<? extends ZipEntry> entries = file.entries();

			//We will unzip files in this folder
			String uncompressedDirectory = "uncompressed/";
			Files.createDirectory(fileSystem.getPath(uncompressedDirectory));

			//Iterate over entries
			while (entries.hasMoreElements()) 
			{
				ZipEntry entry = entries.nextElement();
				//If directory then create a new directory in uncompressed folder
				if (entry.isDirectory()) 
				{
					System.out.println("Creating Directory:" + uncompressedDirectory + entry.getName());
					Files.createDirectories(fileSystem.getPath(uncompressedDirectory + entry.getName()));
				} 
				//Else create the file
				else 
				{
					InputStream is = file.getInputStream(entry);
					BufferedInputStream bis = new BufferedInputStream(is);
					String uncompressedFileName = uncompressedDirectory	+ entry.getName();
					Path uncompressedFilePath = fileSystem.getPath(uncompressedFileName);
					Files.createFile(uncompressedFilePath);
					FileOutputStream fileOutput = new FileOutputStream(uncompressedFileName);
					while (bis.available() > 0) 
					{
						fileOutput.write(bis.read());
					}
					fileOutput.close();
					System.out.println("Written :" + entry.getName());
				}
			}
		}
		catch(IOException e)
		{
			e.printStackTrace();
		}
	}
}