Java Utililty Methods Unzip File

into.mkdirs();
ZipInputStream stream = new ZipInputStream(new FileInputStream(zip));
ZipEntry entry = stream.getNextEntry();
byte[] buffer = new byte[1024];
while (entry != null) {
    String path = entry.getName();
    if (path.startsWith(folder)) { 
        path = path.substring(folder.length(), path.length());
...

ZipFile zfile = new ZipFile(zipf);
Enumeration zList = zfile.entries();
ZipEntry ze = null;
byte[] buf = new byte[1024];
while (zList.hasMoreElements()) {
    ze = (ZipEntry) zList.nextElement();
    if (ze.isDirectory()) {
        File f = new File(String.format("%s/%s", targetDir, ze.getName()));
...

try {
    FileInputStream fis = new FileInputStream(zipFile);
    CheckedInputStream checksum = new CheckedInputStream(fis, new Adler32());
    ZipInputStream zis = new ZipInputStream(new BufferedInputStream(checksum));
    ZipEntry next = null;
    while ((next = zis.getNextEntry()) != null) {
        File currentFile = new File(dest, next.getName());
        if (next.isDirectory()) {
...

ZipInputStream zis = null;
try {
    FileInputStream fis = new FileInputStream(zipFile);
    zis = new ZipInputStream(new BufferedInputStream(fis));
    ZipEntry entry = zis.getNextEntry();
    while (entry != null) {
        byte data[] = new byte[BUF_SIZE];
        File newFile = new File(destDir, entry.getName());
...

ZipFile zip = new ZipFile(zipFile);
try {
    Enumeration<?> en = zip.entries();
    int bufSize = 8196;
    while (en.hasMoreElements()) {
        ZipEntry entry = (ZipEntry) en.nextElement();
        File file = (destDir != null) ? new File(destDir, entry.getName()) : new File(entry.getName());
        if (entry.isDirectory()) {
...

unzip(zipFile, destDir, new byte[1024 * 32]);

if (!isDirectoryWritable(destDir, true)) {
    return "unable to create writable directory: " + destDir;
ZipFile zip = null;
try {
    zip = new ZipFile(zipFile);
    Enumeration<? extends ZipEntry> entries = zip.entries();
    while (entries.hasMoreElements()) {
...

int BUFFER = 2048;
BufferedOutputStream dest = null;
ZipFile zip = new ZipFile(zipFile);
Enumeration<? extends ZipEntry> entries = zip.entries();
ZipEntry entry;
while (entries.hasMoreElements()) {
    entry = entries.nextElement();
    if (entry.isDirectory()) {
...

ZipFile zip = new ZipFile(zipFile);
destination.mkdir();
Enumeration zipFileEntries = zip.entries();
while (zipFileEntries.hasMoreElements()) {
    ZipEntry entry = (ZipEntry) zipFileEntries.nextElement();
    String currentEntry = entry.getName();
    File destFile = new File(destination, currentEntry);
    File destinationParent = destFile.getParentFile();
...

monitor.beginTask("Unzip " + zipFile.getName(), (int) zipFile.length());
final int BUFFER_SIZE = 4096;
ZipInputStream zis = new ZipInputStream(new BufferedInputStream(new FileInputStream(zipFile)));
ZipEntry entry;
while ((entry = zis.getNextEntry()) != null) {
    int count;
    byte data[] = new byte[BUFFER_SIZE];
    File outFile = new File(destination, entry.getName());
...