Java- extract / unzip a zip file - working code example

How to Extract / unzip a zip file in Java - complete source code example .

import java.io.*;
import java.util.zip.*;

public class UnzipTest {
    public static void unzipFile(File f) throws ZipException, IOException {

        ZipInputStream zin = new ZipInputStream(new FileInputStream(f));
        System.out.println(f.getAbsoluteFile());

        String workingDir = f.getPath() + File.separator + "unziped";

        byte buffer[] = new byte[4096];
        int bytesRead;

        ZipEntry entry = null;

        while ((entry = zin.getNextEntry()) != null) {

            String dirName = workingDir;

            int endIndex = entry.getName().lastIndexOf(File.separatorChar);
            if (endIndex != -1) {
                dirName += entry.getName().substring(0, endIndex);
            }

            File newDir = new File(dirName);

            // If the directory that this entry should be inflated under does
            // not exist, create it.
            if (!newDir.exists() && !newDir.mkdir()) { throw new ZipException("Could Not Create Directory " + dirName + "."); }

            FileOutputStream fos = new FileOutputStream(workingDir + entry.getName());

            // Copy Data From the Zip Entry to a File
            while ((bytesRead = zin.read(buffer)) != -1) {
                fos.write(buffer, 0, bytesRead);
            }
            fos.close();
        }
        zin.close();
    }

    public static void main(String[] args) {
        try {
            unzipFile(new File("test.zip"));
            System.out.println("Success");
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("Error - " + e.getMessage());
        }
    }
}