java extract zip

1        String sourceFile = "test1.txt";
2        FileOutputStream fos = new FileOutputStream("compressed.zip");
3        ZipOutputStream zipOut = new ZipOutputStream(fos);
4        File fileToZip = new File(sourceFile);
5        FileInputStream fis = new FileInputStream(fileToZip);
6        ZipEntry zipEntry = new ZipEntry(fileToZip.getName());
7        zipOut.putNextEntry(zipEntry);
8        byte[] bytes = new byte[1024];
9        int length;
10        while((length = fis.read(bytes)) >= 0) {
11            zipOut.write(bytes, 0, length);
12        }
13        zipOut.close();
14        fis.close();
15        fos.close();
16